Relu Cherecheș


32-101 TEZE DE DOCTORAT – Sinteze –

Dr. Ing. Alin-Cosmin TOT
UNIVERSITATEA TEHNICĂ DIN CLUJ NAPOCA
24 august 2015
Titlul tezei: STUDII ŞI CERCETĂRI ASUPRA POLUANTULUI SONOR PRODUS DE SURSE LINIARE, CU DIMINUAREA ACESTORA PRIN FOLOSIREA MATERIALELOR FONOABSORBANTE
Cuvinte cheie: poluare sonoră, surse liniare, protecţie fonică, materiale fonoabsorbante
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Ing. Marinel CÎMPAN
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
16 aprilie 2016
Titlul tezei: STUDII ŞI CERCETĂRI DE MENTENANŢA UTILAJELOR PE PLATFORMELE DE EXPLOATARE PETROLIERĂ
Cuvinte cheie: mentenanţa utilajelor, staţie cogenerativă, termografiere, boroscopare, sisteme de diagnoză, monitorizare
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Ing. Ionela Lavinia LĂPUŞAN
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
16 aprilie 2016
Titlul tezei: STUDII ŞI CERCETĂRI PRIVIND POLUAREA FONICĂ ÎN MEDIUL INDUSTRIAL
Cuvinte cheie: poluarea sonoră, mediu industrial, mǎsurǎtori experimentale, simularea propagǎrii, evaluare fonicǎ
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Ing. Raul Ştefan FODOR
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
24 septembrie 2016
Titlul tezei: STUDII ŞI CERCETĂRI PRIVIND VIBRAŢIILE MECANICE, CU ACŢIUNE ASUPRA ORGANISMULUI UMAN, PENTRU FORTIFICAREA ACESTUIA
Cuvinte cheie: vibraţii mecanice, organismul uman, fortificare prin vibraţii
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Kinet. Sergiu-Dan VESCAN
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
24 septembrie 2016
Titlul tezei: CONTRIBUŢII LA STUDIUL VIBRAŢIILOR ASUPRA ORGANISMULUI UMAN DIN PUNCT DE VEDERE TERAPEUTIC
Cuvinte cheie: vibraţii mecanice, organismul uman, terapie prin vibraţii
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Ing. Andrei Octavian TRITEAN
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
30 septembrie 2016
Titlul tezei: STUDII ŞI CERCETĂRI PRIVIND POLUAREA SONORĂ ÎN TRANSPORTURI
Cuvinte cheie: poluare sonoră, vibraţii mecanice, organismul uman, mijloace de transport grele
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

Dr. Ing. Ovidiu-Ioan VULCU
UNIVERSITATEA TEHNICĂ DIN CLUJ-NAPOCA
30 septembrie 2016
Titlul tezei: STUDII ŞI CERCETĂRI PRIVIND MENTENANŢA MIJLOACELOR DE TRANSPORT
Cuvinte cheie: mentenanţa în transporturi, vibraţii mecanice, vehicule de transport persoane
Conducător ştiinţific: Prof. Dr. Ing. Mariana ARGHIR – UTCN

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32-100 ELEMENTE DE CALCUL AL NECESARULUI DE AZOT PENTRU IZOLAREA CU DOP DE GHEAȚĂ A UNEI CONDUCTE ORIZONTALE DE DIAMETRU MARE

COMPUTATIONAL ELEMENTS FOR THE REQUIRED NITROGEN DURING THE ICE PLUG ISOLATION OF A HORIZONTAL HIGH DIAMETER PIPE-LINE
The technique of forming controlled ice plugs in pipe-line installations in order to isolate a section from the rest of the circuit is used for carrying out circuit maintenance or repair activities without shutting down the entire installation. Considering the results from a controlled test that has been carried out on a horizontal 300 mm nominal diameter pipe-line section, we elaborated a calculation model to reveal the quantity of required liquid nitrogen. It resulted consumption 50 % higher than the actual one. The difference comes from the approximations made for the ice plug dimensions in each stage of the process.
The paper then describes the convenience of visualizing the formation of ice plugs by studying the formation of the ice layers on the pipe inner wall.
Keywords: isolating a pipe-line section, visualizing the forming of ice layers
Cuvinte cheie: izolarea unui tronson de conductă, vizualizarea depunerii de gheaţă

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32-99 STUDII ȘI CERCETĂRI ALE DEZVOLTĂRII STEATOHEPATITEI NONALCOOLICE ÎN BAZA FACTORILOR DE MEDIU ȘI COMPORTAMENTALI CU PRIVIRE LA CONSUMUL ENERGETIC ȘI DE LICHIDE

STUDIES AND RESEARCHES OF THE NON-ALCOHOLIC STEATOHEPATITIS ON THE BASIS OF ENVIRONMENTAL AND BEHAVIORAL FACTORS WITH CONCERN IN ENERGETIC AND LIQUIDS CONSUMPTION
The present scientific article shows among other aspects also the state of the art on non-alcoholic-steato-hepatitis (NASH) and its diagnosis procedure, clinical course, evolution prognosis and therapeutic options available today. It may be pointed out that NASH is a benign although serious disease that has little to do with alcohol but which may lead ultimately to cirrhosis. Environmental factors due to pollution influence may have a contribution in this, as well as the behaviour and education. The present paper review some studies concerning the NASH conditions in the western world and in the same time analyses the relation between environmental state and the disease progress. The paper points out an applied effort on the environmental pollution problem impact on health.
Keywords: behaviour, environment, NASH, overweight, pollution
Cuvinte cheie: comportament, mediu, NASH, supraponderal, poluare

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32-98 TRANZIȚIA LA STANDARDELE DE MANAGEMENT ISO EDIȚIA 2015 – OPORTUNITATE PENTRU CREȘTEREA COMPETITIVITĂȚII FIRMELOR ROMÂNEȘTI

TRANSITION TO ISSUE 2015 OF ISO MANAGEMENT STANDARDS – OPPORTUNITY TO ENHANCE COMPETITIVENESS ROMANIAN COMPANIES
The article examines a sample of 40 companies, the stage of transition to new requirements of the edition 2015 management standards, because we are midway between their approval and due date of transition. Booth, are highlighted best practices in the planning of transition and old bad habits related to training for change and improving the system. It highlights the need for training to be effective and efficient transition.
Keywords: transition to new management standards, best practices
Cuvinte cheie: tranziția la noile standarde de management, bune practici

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32-97 REUTILIZAREA STICLEI REZULTATE LA RECICLAREA VEHICULELOR SCOASE DIN UZ

REUSING OF GLASS RESULTED FROM RECYCLING
OF THE END OF LIFE VEHICLES
Economic and social development led to a significant amount of waste that must be stored which causes difficulties in storage and environmental issues. Explore the possibility of reusing glass from end of life vehicles represents the desire of this article. Advanced reusing of materials contributes significantly to consolidated environmental management implementation, which allows the environment and economy to coexist harmoniously, in the sustainable development paradigm of the beginning of this century. It is also the first condition for the development of a circular economy.
Keywords: end of life vehicles, glass, reusing, environmental impact
Cuvinte cheie: vehicule scoase din uz, sticla, reutilizare, impactul asupra mediului

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32-96 PERDELE DE VEGETAȚIE PENTRU IZOLAREA ZGOMOTULUI DIN TRAFICUL RUTIER

CURTAIN VEGETATON FOR NOISE ISOLATION
FROM ROAD TRAFIC
The following pertains to the measures that are undertaken in urban planning to combat the growing problem of noise in regards to the buildings peripheral to roadways and the types of plantations that tackle these issues in an efficient and comprehensive way along the country.
Keywords: noise isolation, green curtain, urban protection
Cuvinte cheie: izolarea zgomotului, perdele verzi, izolare urbană

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32-95 METODOLOGIA DE DETERMINARE PASIVĂ A CONCENTRAȚIILOR DE RADON ÎN AERUL DIN INTERIORUL CLĂDIRILOR

THE METHODOLOGY TO PASSIVE MONITORING OF INDOOR RADON IN BUILDINGS
Radon inside buildings represents the main source of human exposure to ionizing radiation in the world. Studies in many countries have shown that high levels of indoor radon increases the risk of lung cancer. This article present the method selected by the competence European authorities as the most suitable to complete the map of indoor radon concentration in buildings. The 59/2013 EURATOM Directive recommends to all European member countries to implement their legislation in order to protect the population from radon since 2018. The recommended method for measuring the annual concentration of radon in buildings is based on passive monitoring of radon levels by CR-39 radon detectors.
Keywords: indoor radon, passive method, CR-39 detectors
Cuvinte cheie: radon din interior, metoda pasivă, detector CR-39

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32-94 METODOLOGIE PENTRU MĂSURĂTORILE DE RADON DIN SOL

THE METHODOLOGY TO PERFORM SOIL-RADON MEASUREMENTS
Exposure to radon in homes and at workplaces constitutes one of the greatest risk from ionizing radiation. The main source of radon in buildings can be consider the soil around the house. Radon constitutes a risk which can be managed and can be reduced at reasonable costs, thereby saving many lives. The harmonized method most used worldwide to evaluate the risck of radon at a building site is presented in the curent paper.
Keywords: radon, sol, permeabilty
Cuvinte cheie: radon, sol, permeabilitate

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32-93 PROPRIETĂȚILE FIZICO-CHIMICE ALE SOLULUI DIN JURUL HALDEI RADEȘ – JUDEȚUL ALBA

PHYSICO-CHEMICAL PROPERTIES OF SOIL FROM
AROUND THE RADEȘ DUMP/ALBA COUNTY
Mining activity carried out in the past has led over time to the pollution of large tracts of land to impaired quality of the environment and human health. This paper presents physical-chemical soil around the mine Rades in choosing the most appropriate technology to remedy it. The results showed that the soil in the study area is well and poorly structured, humidity is higher upstream landfill (35.13 %) and lower downstream from it (16.36 %.) And soil pH is acidic to slightly acid values falling in the range of 4.8-6 pH units.
Keywords: dump, mining, sampling points, soil pollution
Cuvinte cheie: haldă de steril, activități miniere, puncte de prelevare, poluarea solului

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32-92 EXPLOATAREA ŞI RECUPERAREA CĂLDURII DIN SURSE ENERGETICE SECUNDARE CU POTENŢIAL TERMIC COBORÂT

HEAT EXPLOITATION AND RECOVERY FROM SECONDARY ENERGY SOURCES WITH HEAT DOWN POTENTIAL
The reduction of energy consumption or the heat recovery from different sources is an increasingly important activity both at EU. Facilities commonly used for heat recovery are heat exchangers, and heat pump. Starting from this paper, it was considered appropriate to approach a research on the heat recovery using heat exchanger form wastewater. The potential of wastewater, types of heat exchangers and their applications is discussed. In this study, is presented a reiew of heat exchangers are classified in detail based on multiple features, including utilization and construction, methodology.
Keywords: wastewater, heat recovery, energy, heat exchanger
Cuvinte cheie: apă uzată, recuperare căldură, energie, schimbător de căldură

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32-91 ASPECTE PRIVIND IMPACTUL ȊNGRĂŞĂMINTELOR CHIMICE ASUPRA SOLULUI

ASPECTS RELATING CHEMICAL FERTILIZERS
IMPACT ON SOIL
Chemical fertilizers are frequently used in agriculture for increasing agricultural outputs. Incorrect handling can cause soil pollution and damage to surface waters. The paper provides a series of chemical fertilizers examples used frequently in Romania. Furthermore the paper is showing an analysis on their impact on soil and water. A series of determinations were made for revealing their presence and their provenance. In this regard the paper is proposing to carry out a data base for revealing information about: identification, implementation and evaluation of risk assessment on soil caused by certain pollutants (heavy metals, nitrides).
Keywords: fertilizer, soil pollution, impact on the environment
Cuvinte cheie: îngrășăminte chimice, poluarea solului, impact asupra mediului

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32-90 ELIMINAREA PESTICIDELOR DIN MEDIUL ACVATIC

TAPPING PESTICIDES FROM AQUATIC ENVIROMENT
Throughout agricultural technologies a series of chemical substances are used for pest-control. Among this substance, we have to notice the pesticides due to their negative impact on the aquatic ecosystem. The most dangerous pesticides are the organochlorines, because of their property to accumulate into adipose tissues. Organochlorines through their chemical composition have mutagenic and carcinogenic potency.
The paper provides several methods for tapping these substances from surface waters. One of the methods often used is using selective membranes during the process of reverse osmosis providing chemical oxidation and adsorption.
Keywords: pesticides, pollution, waste water polluted with pesticides
Cuvinte cheie: pesticide, poluarea apelor, epurarea apelor poluate cu pesticide

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32-89 IMPACTUL COMPUȘILOR ORGANICI VOLATILI ASUPRA MEDIULUI ŞI POSIBILITĂȚI DE REDUCERE PRIN CELE MAI BUNE TEHNICI DISPONIBILE

VOLATILE ORGANIC COMPOUNDS IMPACT ON ENVIRONMENT AND THEIR REDUCTION THROUGH THE BEST AVAILABLE TECHNOLOGIES
This paper presents an analysis of the sources of volatile organic compounds (VOCs) in the atmosphere. VOCs impact on the environment and human health are reported.
In the second part of the paper some possibilities to reduce VOCs are shown, by employing the best available techniques (BATs).
Keywords: volatile organic compounds, best available technologies
Cuvinte cheie: compuși organici volatili, cele mai bune tehnologii disponibile

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32-88 FACTORII CARE INFLUENŢEAZĂ PROPRIETĂŢILE FONOABSORBANTE ALE MATERIALELOR

THE FACTORS THAT INFLUENCE THE SOUND ABSORPTION COEFFICIENT OF MATERIALS
Starting from the premise that the sound absorbing materials are used in almost all domains of activity, we analysed the factors that influence the properties of sound absorbing materials: density, porosity, resistance to airflow, tortuosity, thickness and the placement of material.
Keywords: density, Sound wave absorption, the material structure
Cuvinte cheie: densitatea, absorbţia undei sonoare, structura materialului

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32-87 STUDIUL ABSORBŢIEI SONORE DE CĂTRE PLANTELE DE INTERIOR

STUDY OF SOUND ABSORPTION BY INTERIOR PLANTS
The paper contains a proof study on the sound absorbtion by ornamental plants (indoor). They have considered a lot of plants: Buxus Sempervirens, Thuja Occidentalis, Ficus Benjamina, Spathiphyllum and Philodendron Scadens Spatiphyllum, for which we have been made on the sound absorption measurement and came to some remarkable conclusions concerning absorbed soundtrack by these plants. In this paper it proves why some plants have more pronounced sound absorption than other plants. Demonstration is made by microscopic study of the leaf planting.
Keywords: pollution sound, absorption, houseplants
Cuvinte cheie: poluare sonorǎ, absorbție, plante de interior

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32-86 CONSIDERAȚII ASUPRA MODALITĂȚILOR DE VALORIFICARE ENERGETICĂ A DEȘEURILOR MUNICIPALE ÎN JUDEȚUL SATU MARE

CONSIDERATIONS ON MODALITIES HOW MUNICIPAL WASTE ENERGY CAPITALIZING IN COUNTY SATU MARE
This paper proposes a method of critical analysis of methods of municipal waste energy recovery, with emphasis on the fraction that can not be integrated into traditional recycling streams. We refer to this category of waste, which includes a degraded state, plastic, paper, wood and textiles that can not be recycled, recovered through existing pathways. Among the main objectives of this work are: waste structure analysis at regional warehouse Doba and their potential exploited; Determination of the energy potential of partially dried; Analysis on the processes of energy capitalizing from municipal waste
Keywords: Municipal waste, energy potential, energy capitalizing, fuel economy
Cuvinte cheie: deșeuri municipale, energie potențială, valorificare energetică, economia de combustibil

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32-85 CONTRIBUȚII LA CERCETAREA APLICATIVĂ A EFECTELOR POLUĂRII MEDIULUI ÎNCONJURĂTOR DE CĂTRE TRAFICUL RUTIER ASUPRA ANATOMIEI OCHILOR ȘI A DEZVOLTĂRII PATOLOGICE

CONTRIBUTIONS TO THE APPLIED RESEARCH OF EFFECTS FROM SURROUNDING ENVIRONMENT POLLUTION DUE TO ROAD TRAFFIC UPON EYES’ ANATOMY AND PATHOLOGY DEVELOPMENT
Air pollution due to road traffic and all automotive related industries influence the natural characteristics and composition of the earth’s atmosphere. Surrounding environmental pollution due to excessive road traffic is nowadays an important determining factor in health development and stability. Pollutants of major public health concern include particulate matter (PM), carbon monoxide (CO), ozone (O3), nitrogen dioxide (NO2), and sulphur dioxide (SO2) according to the World Health Organization (WHO). The present scientific article reviews some applied studies that investigated the adverse effects of air pollution on the ocular surface and also presents some SO2 experimental data recorded in Cluj-Napoca city in recent years. The paper summarizes an experimental work on the problem of pollution impact upon human health.
Keywords: air, environment, eye, pollution, ocular surface
Cuvinte cheie: aer, mediu, ochi, poluare, suprafaţa oculară

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32-84 RECICLAREA MATERIALELOR TEXTILE PENTRU DURABILITATEA MEDIULUI ÎNCONJURĂTOR

RECYCLING TEXTILE MATERIALS FOR
ENVIRONMENTAL SUSTAINABILITY
The article presents the main problems related to over-consumption of clothes and textiles in general, due to the demand of new fashion and fast production. Therefore, it will present information about the businesses that are utilizing recycled clothing in a variety of services in order to prevent waste and maintain environmental sustainability. Also, the article will have a focus on the main fashion chains, ZARA and H&M and the Circular Economy that they present as a business method. We will see the importance of protecting the resources and our environment through ways and methods which also help the global economy.
Keywords: recycling, sustainability, textile industry, environment, circular economy

Cuvinte cheie: reciclare, sustenabilitate, industria textilă, mediu, economie circulară

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32-83 ESTIMAREA CONCENTRAȚIEI DE POLUANȚI CU SCREEN VIEW

ESTIMATING POLLUTANT CONCENTRATION USING SCREEN VIEW
Screen View is a program that uses Gaussian air dispersion model to estimate pollutants concentration at ground level. In function of pollutant source type, weather conditions and pollutant characteristics, is calculated the concentration (in μg/m3) vs. distance from source (in m).
Keywords: air pollution, Gaussian model for pollutant dispersion in air
Cuvinte cheie: poluarea aerului, model Gaussian al dispersiei poluanților în atmosferă

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32-82 VALORIFICAREA NĂMOLURILOR PROVENITE DE LA STAŢIILE DE TRATARE A APELOR UZATE DIN PERSPECTIVA ECONOMIEI CIRCULARE

SLUDGE VALORIZATION FROM WASTEWATER
TREATMENT PLANT TOWARDS A CIRCULAR ECONOMY
This study aimed to investigate the sludge removed from wastewater treatment plants and various modes of disposal as waste. One way of treating it as fertilizer on agricultural land use, its rich content in nutrients. So then it is necessary analysis and testing before use sludge future presentation. However, this method may be limited by the presence of heavy metals, pollutants microbiological agents, organic and inorganic contaminants. In this article, a variety of sampling analysis, pre-treatment, extraction and methods have been reviewed. Therefore, we consider that an important part of treatment of sludge prior to disposal is the separation of water and sludge volume reduction.
Keywords: sludge, capitalization, circular economy, wastewater treatment

Cuvinte cheie: nămol, valorificare, economie circulară, epurare ape uzate

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32-81 METODA DE ANALIZĂ A MESAJELOR PLATFORMELOR ON-LINE DIN PERSPECTIVA ECONOMIEI CIRCULARE

METHOD OF ANALYSIS ONLINE MESSAGING PLATFORMS FROM THE PERSPECTIVE OF CIRCULAR ECONOMY
This paper is based on the fact that online messages are a reality that must be taken into consideration in the traditional manufacturing process, including castings. Since circular economy principles are known for a long time in the mentioned area, this paper intends to analyse the entrepreneurial platforms in terms of sustainable development among the actors of these specific activities. The rationale of this scientific approach is given by the possibility of building a working instrument used in setting entrepreneurial platforms from the point of view of validating actions of eco-responsibilities in the field of castings from the perspective of circular economy.
Keywords: circular economy, online entrepreneurial platform, castings, online environment, online image, image analysis, image profiles
Cuvinte cheie: economie de circulară, platforma antreprenorială on-line, piese turnate, mediul on-line, imagine online, analiza imaginii, profile de imagine

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32-80 METODE ȘI TEHNOLOGII ECO-INOVATIVE PENTRU REDUCEREA ȘI RECICLAREA POLUANȚILOR ORGANICI PERSISTENȚI DIN MEDIUL ÎNCONJURĂTOR – Prezentare Generală

ECO-INNOVATIVE METHODS AND TECHNOLOGIES FOR REDUCING AND RECYCLING OF PERSISTENT ORGANIC POLLUTANTS FROM ENVIRONMENT-AN OVERVIEW
The most toxic pollutants in the environment that originated from human activities are the Persistent Organic Pollutants (POPs) which are chemicals that accumulate and persist in the environment through the trophic web causing negative effects to human and environment health. POPs present a high risk because of their capacity to be transported across the borders affecting even regions where they have never been used or produced. This article presents a general description of the persistent organic pollutants and their level at the UE level and aim to revise the best available methods and technologies utilized in reducing POPs, along with their advantages and disadvantages. The flux of the persistent organic pollutants in the environment is also outlined with the purpose to identify the low spots that need to be addressed.
Keywords: POP, bioremediation, sustainability, hazardous substances

Cuvinte cheie: POP, bioremediere, sustenabilitate, substanțe periculoase

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32-79 STUDII PRIVIND EVOLUȚIA UNOR INDICATORI AI CALITĂȚII AERULUI, AFECTAȚI DE TRAFICUL AUTO ÎN MUNICIPIUL CLUJ NAPOCA

STUDIES ON SOME AIR QUALITY INDICATORS
AFFECTED BY ROAD TRAFFIC IN CLUJ-NAPOCA CITY
The paper aims to present the current level of air pollution produced by road traffic in Cluj-Napoca city, and finally, provides possible solutions so that the pollution levels will be reduced and air quality will improve. Environmental Protection Agency in Cluj County has installed a number of 4 automatic stations for air quality measuring, in Cluj-Napoca. Measurement of PM10 pollutants is achieved by using LSPM10 method. All the recommendations were adapted to the specificity of Cluj-Napoca City, the second largest city in the country.
Keywords: air pollution, PM10, traffic, Cluj-Napoca City
Cuvinte cheie: poluarea aerului, PM10, trafic, municipiul Cluj-Napoca

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32-78 EFECTUL DEZVOLTĂRII COMPACTE ȘI PE VERICALĂ A MUNICIPIULUI CLUJ-NAPOCA ASUPRA MEDIULUI AMBIANT

THE EFFECT OF DEVELOPMENT COMPACT AND
VERTICAL CITY CLUJ-NAPOCA ON ENVIRONMENT
This paper presents some considerations on the impact on the environment of the development compact and vertically around the old traffic arteries, an urban ecosystem. As a case study, it is analysed central area of Cluj-Napoca, the results of the measurements made and the sources of noise by monitoring noise generated by road traffic in the period 2007 -2015.
Keywords: urban, noise, pollution, car traffic, environment
Cuvinte cheie: centre urbane, zgomot, poluare, trafic auto, mediu ambiant

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32-77 CONTROLUL ŞI REDUCEREA POLUĂRII ÎN TRANSPORTURI PE RAZA MUNICIPIULUI CLUJ – NAPOCA

CONTRÔLER ET RÉDUIRE LA POLLUTION DES TRANSPORTS DANS LA MUNICIPALITÉ DE CLUJ – NAPOCA
Ce document vise à présenter des méthodes pour contrôler et réduire la pollution dans les transports commune Cluj Napoca; la pollution en termes d’air et le son.
Mots-clés: pollution sonore, pollution de l`air, contrôle de la pollution, réduire la pollution, pollution de Cluj – Napoca

Cuvinte-cheie: poluare sonoră, poluare atmosferică, controlul poluării, reducerea poluării, poluarea oraşului Cluj – Napoca

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32-76 ASPECTE PRIVIND EFECTELE POLUĂRII AUTOVEHICULELOR ASUPRA MEDIULUI ÎNCONJURĂTOR – Studiu de caz

ASPECTS WITH REGARD TO THE EFFECTS OF MOTOR VEHICLE ENVIRONMENTAL POLLUTION – A case study
Pollution can be considered a major assault on the environment caused by modern man. Air pollution caused by industrial activities and road traffic has a significant impact on the health of the population, especially on those who are living in urban areas, more exactly for 80% of Europeans. It involves the emanation of organisms, which release harmful substances into the atmosphere. The amount of pollutants emitted into the air we breathe was greatly reduced once the EU has introduced policies and measures addressing air quality in the 1970s. Design and implementation of policies to address this complexity is not an easy task.
Keywords: pollution, vehicles, environmental policy, overbuilding, traffic congestion

Cuvinte cheie: poluare, autovehicule, politici de mediu, aglomerare urbană, congestie de trafic

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32-75 METODĂ DE DETECTARE A DEFECTELOR GRINZILOR ÎNCASTRATE LA AMBELE CAPETE SUPUSE VARIAŢIILOR DE TEMPERATURĂ

METHOD TO DETECT STRUCTURAL DAMAGE
IN DOUBLE-CLAMPED BEAMS IN
CHANGING TEMPERATURE ENVIRONMENT
In this paper we present a method to detect damages in beam-like structures applicable if the temperature during structural monitoring is subject of changes. Experiments are performed on a steel beam for the intact case to attain a baseline. Afterwards, measurements are performed on a beam with known damage location. Comparison is made via Minkowski distance, and the location is found with precision, proving that the developed method is applicable for beams if temperature changes are present during monitoring.
Keywords: damage detection, natural frequency, temperature, filtering, correction, experimental method
Cuvinte cheie: detectarea defectelor, frecvenţe proprii, temperatura, filtrare, corectare, metoda experimentală

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32-74 FILTRAREA ŞI CORECTAREA VALORILOR FRECVENŢELOR PROPRII ALE GRINZII DUBLU ÎNCASTRATE EXPUSĂ INFLUENŢEI VARIAŢIILOR DE TEMPERATURĂ

FILTERING AND CORRECTION OF NATURAL
FREQUENCY VALUES FOR A DOUBLE-CLAMPED BEAM
SUBJECTED TO TEMPERATURE CHANGES
This paper presents the effect of temperature changes on the natural frequencies of beams. These may have perfect or elastic restraints at ends. A temperature increase produces compressive stress and consequently a natural frequency decrease. We contrived mathematical relations to evaluate the effect of temperature for the cases of perfect rigid as well as for elastic restraints. If the beam is imperfect, i.e. anisotropic, non-homogeneous or not strength in the initial state, a correction term has to be employed to accurately find the frequencies. The correction method is also presented.
Keywords: natural frequencies, filtering, correction algorithm, temperature
Cuvinte cheie: frecvenţe proprii, filtrare, metodă de corecţie, temperatura

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32-73 ANALIZA MODELULUI EMPIRIC, FOLOSIND SISTEME DE EVENIMENTE DISCRETE APLICABILE PENTRU SISTEMELE DE TRANSPORT

ANALYSIS EMPIRICAL MODEL USING DISCRETE EVENT SYSTEMS APLICABLE FOR TRANSPORT SYSTEMS
In the paper have started from a model that allows a detailed empirical analysis of causal relationships and obtaining patterns that determine the evolution of the phenomenon. The model chosen for the study is a discrete event system applicable to optimize the transport system adaptable for manufacturing systems. In order to simulate the manufacturing process we chose Visual Object Net ++ package containing pntool library, which can be done graphics modelling analysis. Given that manufacturing times are very high and difficult process simulation is conducted, we reduced schedule in accordance with the transmission system.
Keywords: discrete event systems, manufacturing, analysis model
Cuvinte cheie: sisteme cu evenimente discrete, de fabricație, modelul de analiză

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32-72 TRANSPORTURI AGABARITICE. ELEMENTE TEORETICE DE PROIECTARE ȘI DATE REALE CONSTATATE

OVERSIZED TRANSPORT. THEORETICAL DESIGN ELEMENTS AND REAL DATA FOUND
The paper presents the difficulty of oversized transport in the European Community due to uneven rules preparation of necessary documents from country to country. These problems lead to high costs, prolonged transport, human and financial resources inefficiently used. Two oversized transport companies, one from Serbia and one from Romania, had made 43 low loaders from Croatia to Sweden, in technical and economic limits accurate. There were made pre-transport calculations related to speed, distance, fuel consumption, maintenance costs. From data collected in the field or through the tracking of trucks are highlighted differences between theoretical calculations and actual values of transport parameters.
Keywords: oversized transport, optimization route, restrictions
Cuvinte cheie: transport agabaritic, optimizare rută, restricţii

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32-71 ASPECTE PRIVIND ACCESIBILITATEA TRANSPORTULUI ÎN COMUN ÎN MUNICIPIUL SIBIU

ISSUES ON ACCESSIBILITY OF PUBLIC
TRANSPORT IN SIBIU
This paper presents the analysis of the transport service of the municipality of Sibiu. It analyses time tracking for buses on two lines of transportation in Sibiu
Keywords: transportation, time tracking
Cuvinte cheie: transport în comun, interval de urmărire

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32-70 http://stiintasiinginerie.ro/wp-content/uploads/2017/05/32-70.-SOLICITAREA-LA-VIBRAŢII-A-COLOANEI-VERTEBRALE-ÎN-CONDIŢII-DE-TRANSPORT-Acxel-Emil-FARCAȘ-Mariana-ARGHIR-1.pdf

OSCILLATING SPINE IN CONDITIONS OF TRANSPORT
The paper contains analysis of vibration measurements on a human subject located in a vehicle. The measurements were made by categories of road: asphalt, gravel and soil. Accelerometer positions were under the seat to the lumbar spine. This paper aims to establish the transmission of vibrations occurring in a vehicle and acting on the occupants.

Keywords: vibration effects, instrumentation, medium, transducer, sat
Cuvinte cheie: vibraţii, efecte, aparate de măsură, mediu, traductor, şezut

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32-69 SIMULATOR ELECTRO-HIDRAULIC MOBIL PENTRU PROVOCAREA DERAPAJULUI LATERAL UTILIZAT PENTRU INSTRUIREA CONDUCĂTORILOR DE AUTOTURISME PARTEA II – INSTALAŢIILE HIDRAULICĂ ŞI ELECTRICĂ

ELECTRO-HYDRAULIC MOBILE SIMULATOR TO CHALLENGE E A SIDE SKID USED FOR

THE TRAINING OF DRIVERS

PART II–ELECTRIC AND HYDRAULIC EQUIPMENTS

 

The article presents a simulation equipment to cause side skidding of the cars, used for training/preparing for special situations of the drivers. In the second part of the article, are presented the electric and hydraulic equipment, which assure the running of the simulator, in good conditions.

 

Keywords: electro-hydraulic equipment, mobile simulator, skidding sideways operated electro-hydraulic, electro-hydraulic simulator

Cuvinte cheie: echipament electro-hidraulic, simulator mobil, derapaj lateral, acţionare electro-hidraulică, simulator electro-hidraulic

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32-68 SIMULATOR ELECTRO-HIDRAULIC MOBIL PENTRU PROVOCAREA DERAPAJULUI LATERAL UTILIZAT PENTRU INSTRUIREA CONDUCĂTORILOR DE AUTOTURISME PARTEA I – CONCEPŢIA GENERALĂ A ECHIPAMENTULUI

ELECTRO-HYDRAULIC MOBILE SIMULATOR TO CHALLENGE E A SIDE SKID USED FOR

THE TRAINING OF DRIVERS

PART I – GENERAL CONCEPTION

 

The article presents a simulation equipment to cause side skidding of the cars, used for training / preparing for special situations of the drivers. In the first part of the article, are showed the general conception of the equipment design, main parts, technical characteristics and performances.

 

Keywords: electro-hydraulic equipment, mobile simulator, skidding sideways operated electro-hydraulic, electro-hydraulic simulator

Cuvinte cheie: echipament electro-hidraulic, simulator mobil, derapaj lateral, acţionare electro-hidraulică, simulator electro-hidraulic

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32-67 ROMANIAN ALL – TERRAIN SUPPLY VEHICLE (RATSV) – MINIROBOT DESTINAT APROVIZIONĂRII STRUCTURILOR LUPTĂTOARE DISLOCATE ÎN ZONELE MONTANE

ROMANIAN ALL – TERRAIN SUPPLY VEHICLE (RATSV) – MINI ROBOT INTENDED FOR THE SUPPLY OF THE COMBAT STRUCTURES DEPLOYED IN MOUNTAINOUS AREAS

 

In the present paper the authors describe the construction of an innovative functional model of tracked mini robot intended for the supply of troops deployed in hard to reach areas, such as mountainous ones or those that involve a high degree of risk for the human operator; this is a solution meant to support the future potential construction of innovative prototypes of mini robots designed for these missions and tasks. We present in the paper the assembly, the operation and the role of the body parts chosen for the construction of the tracked mini robot variant, describing, in detail, the advantages and the opportunities to valorise this present technological product during the assigned missions.

 

Keywords: tracked mini robot, human-artificial “partnership”, modularized structure, special applications, hard to reach areas

Cuvinte cheie: minirobot şenilat, “parteneriat” uman-artificial, structură modularizată, aplicaţii speciale, zone greu accesibile

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32-66 CONSIDERAȚII PRIVIND IMPACTUL DINTRE UN PARAPET DE PROTECȚIE ŞI UN PENDUL

CONSIDERATIONS REGARDING THE IMPACT OF A PROTECTIVE BARRIER AND A PENDULUM

 

The paper presents the impact of a pendulum with a weight of 2780 kg and a road protective barrier used on the roads of Romania. Deformable parapets are very important to protect the pedestrians and the vehicles on our roads. The maximum dynamic deflection of the parapet, measured after the test was 0,240 m and 0,435 m of working width.

The barrier was deformed as expected. Damping elements have taken a large amount of energy during impact. The pendulum is used by researchers in this field. This is a very good way to track the behavior and damping elements of the barriers in the laboratory.

 

Keywords: shock test, road restraint systems

Cuvinte cheie: încercare la şoc,  sisteme de reținere rutiere

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32-65 TESTE EXPERIMENTALE PE DISCUL BIPLAN AL VANEI FLUTURE

EXPERIMENTAL TESTS ON A BUtTERFLY

VALVE BIPLAN DISC

 

The paper present the obtained experimental results after laboratory tests on a butterfly valve biplane disc by using electrical resistive tensometry method. Measuring the variation of the sensor’s resistance through electrical methods is proportionally with its elongation and the deformation of the part of the butterfly valve disc. The measured elongations for three static loads applied on the valve disc are presented.

 

Keywords: deformations, biplane butterfly valve disc, tensometers electro-resistive

Cuvinte cheie: deformaţii, disc biplan vană fluture, tensometrie electro-rezisitivă

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32-64 REZULTATE PRELIMINARE PRIVIND UTILIZAREA METODEI CORELĂRII DIGITALE A IMAGINII ÎN STUDIUL IMPLANTURILOR DENTARE

PRELIMINARY RESULTS CONCERNING ON THE IMPLEMENTATION OF THE VIDEO IMAGE CORRELATION METHOD IN THE DENTAL IMPLANTS ANALYSIS

 

The authors, in their preliminary investigations [1; 2; 3], conceived an original testing bench, destined to human mandibles’ strain-state evaluation.

Involving the mentioned testing bench, the authors started to perform some preliminary experimental investigations in several dental implants’ behaviours.

In the described investigations, the authors some useful correlations between the dental implant’s positioning on the mandible, the applied mastication force magnitude and its relative 3D positioning with respect to the implant’s longitudinal axis.

Their next topic will consist in a searching examination of the optimal positioning of the implants, with respect to their loading conditions.

One has to underline the fact that the proposed original methodology will represent in the next period a high-accuracy approach in the evaluation of the strain-state analysis of the dental implants.

 

Keywords: dental implant, testing bench, displacement field, Video Image Correlation

Cuvinte cheie: implant dentar, stand de încercat implanturi, câmp de deplasare, Corelare Digitală a Imaginii (VIC)

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32-63 CONSIDERAȚII ASUPRA TENSIUNILOR ȘI DEFORMAȚIILOR DIN CADRELE PRESELOR DE MARE TONAJ

CONSIDERATIONS ON THE FRAMES STRESSES

AND STRAINS HEAVY PRESSES

 

In paper presents a theoretical study of the state of stress and strain in the machine frame framework heavy press. These frameworks are made up of a plurality of frames each comprised of two closed C-shaped elements (calipers) connected by tightening by means of threaded rods (Fig. 1)

 

Keywords: press, frame, strength, stress, deformations, thrusts

Cuvinte cheie: presă, batiu, forță, tensiuni, deformații, tirant

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32-62 APLICATII ALE METODELOR NUMERICE DE CALCUL ÎN ANALIZA COMPORTĂRII VANELOR FLUTURE BIPLANE

APPLICATIONS OF THE NUMERICAL METHODS IN ANALYZE THE BEHAVIOR OF BIPLANE BUTTERFLY VALVES

 

The paper presents the elongations obtained by numerical results on a butterfly valve biplane disc by using finite element method and these values were compared with elongations resulted from laboratory tests for three levels of water pressure applied upstream the biplane disc. The comparison between two methods to determine the elongation it shows that the finite element method applied to the disc can replace electrical resistive tensometry, to compute stresses and deformations for biplane butterfly disc on an industrial scale.

 

Keywords: finite element method, disc biplane specific strain

Cuvinte cheie: metoda elementelor finite, disc biplan, deformaţii specifice

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32-61 ANALIZA STĂRII DE TENSIUNI ŞI DEFORMAŢII ÎN CORPURILE DE RULARE DE MICI DIMENSIUNI

STRESS AND STRAIN ANALYZE OF

SMALL ROTATION BODIES OF BEARINGS

 

In the paper is presented the study of tensions and strains ho appears in small radial roller bearings during the compressive strength testing caused by forces acting perpendicular to the roller generator. For modelling a roller bearing Ø 16×24 [mm] we used SolidWorks program, the tests were conducted on two types of rollers with and without defect loaded in five-speeds charging.

 

Keywords: reel, bearing, local deformation, finite element

Cuvinte cheie: rolă, rulment, deformaţie locală, elemente finite

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32-60 STUDIUL STĂRII DE TENSIUNI ȘI DEFORMAȚII ALE ROLELOR DE RULMENT PRIN MODELARE CU METODA ELEMENTELOR FINITE

STRESS AND STRAIN STUDY OF THE ROLLER BEARINGS USING FEM METHOD

 

This paper aims to study the stresses and strains that occur in small radial bearings with rolls of Æ 7,5×15 mm diameter. We have considered five-speed charging for two distinct cases: without and with defects.

 

Keywords: roller bearing, contact voltage, strain, roll flange

Cuvinte cheie: rulment radial, tensiune de contact, deformație, rolă-placă plană

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32-59 EFICIENŢA DIFERIŢILOR ESTIMATORI AI DISIMILARITĂŢII UTILIZAŢI ÎN DETECTAREA DEFECTELOR

THE EFFICIENCY OF SEVERAL DISSIMILARITY ESTIMATORS USED IN DAMAGE DETECTION

 

This paper deals with damage detection methods based on interpreting the results of vibration measurement. We briefly described an own method for damage evaluation, which takes into account a large number of frequencies achieved from weak axis bending modes. This allows the precise location of the defect location. We represented two histogram types, one with measurements and several resulted from calculations for possible damage scenarios. The damage location was determined with three estimators, among those the best results being attained with the Minkowski distance.

 

Keywords: damage, severity assessment, natural frequencies, vibration

Cuvinte cheie: defecte, evaluarea severității, frecvenţe naturale, vibraţii

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32-58 MODIFICAREA DISTRIBUŢIEI TENSIUNILOR ÎN ZONA DEFECTULUI ŞI EFECTUL ACESTEIA ASUPRA FRECVENŢELOR PROPRII ALE GRINZII

STRESS DISTRIBUTION ALTERATION IN THE DAMAGED ZONE AND ITS EFFECT ON THE BEAM’S NATURAL FREQUENCIES

 

In this paper the relation to be used for deriving the frequency of a beam with transverse crack is tested against finite elements method (FEM) simulation results. We have first analytically derived the beam deflection and compared with results achieved by means of the FEM simulation. The good concordance was found, thus the FEM model is calibrated. Afterwards, damage of different depth was introduced in the beam and the natural frequencies derived. These values were compared against results attained by applying the proposed relation and a good fit was found.

 

Keywords: beam, damage detection, vibration, natural frequencies, deflection

Cuvinte cheie: grindă, detectarea defectelor, vibraţii, frecvenţe proprii, săgeată

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32-57 DESPRE MODIFICAREA FRECVENŢELOR NATURALE ALE GRINZILOR DATORITĂ COROZIUNII

ON THE NATURAL FREQUENCY CHANGES OF

BEAMS DUE TO CORROSION

 

This paper presents a relation to be used for deriving the effect of mass loss on the natural frequencies of beams. Herein the stiffness decrease is not considered, since its effect on the natural frequencies is well-known. Consequently, the beam was considered with a constant cross-section but with reduced volumetric mass density in the corroded region. By this approach, we have first analytically studied the beam dynamics from an energetic point of view and contrived the mathematical relation. Afterwards, this relation was successfully tested against FEM simulations.

 

Keywords: beam, corrosion, vibration, natural frequencies, mode shape

Cuvinte cheie: grindă, coroziune, vibraţii, frecvenţe naturale, formă modală

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32-56 OPTIMIZAREA TOPOLOGICĂ A STRUCTURILOR ÎN INGINERIE

TOPOLOGICAL OPTIMIZATION OF THE STRUCTURE IN ENGINEERING

 

Nowadays the rapid development of the industry required use the optimization method. First part of this study shows the structural optimization method used in mechanical enginnering, being made a detailed explanation of the iterative optimization process. In the second part of the paper is presented the CAD modelling and the topological optimization of the holder used in mechanical engineering. the results of the optmization study and the conclusions are presented at the end of this paper.

 

Keywords: topological optimization, finite element analysis, objective functions

Cuvinte cheie: optimizare topologică, analiza cu elemente finite, funcții obiectiv

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32-55 SIMULAREA NUMERICĂ A UNEI VANE DE ECLUZĂ DE LA HIDROCENTRALA PORȚILE DE FIER I

NUMERICAL ANALYSIS OF A LOCK VALVE

OF IRON GATE I HYDRO

 

One of the valves of the intermediate head of the lock of Iron Gate I Hydroelectric Power Station was damaged; it was replaced by another version. In order to elucidate the cause of the damage was done a numerical simulation using ANSYS Fluent software. The simulation has required the modeling of parts of channel for filling/emptying of the lock, taking also into account the hydrostatic water pressure, not just those static or dynamic. The paper presents a modeling of steady flow through the valve which is in a certain position, which shows velocity and pressure fields and the forces on the faces of the valve.

 

Keywords: lock, water navigation, valve, Iron Gate I Hydroelectric Power Station, numerical analysis, ANSYS Fluent

Cuvinte cheie: ecluză, vană, hidrocentrala Porțile de Fier I, simulare numerică, ANSYS Fluent

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32-54 METODĂ HIBRIDĂ DE STUDIU PENTRU ORICE TIP DE SECȚIUNE SUPUSĂ LA TORSIUNE

A HYBRID MeTHOD OF STUDY FOR ANY SECTION

TYPE UNDER TORSIONAL LOADING

 

This paper presents a methodology regarding the numerical analysis of any section type under torsion loading. This methodology is named a hybrid one, because it practically consist in using of the membrane analogy – an experimental method –  but the solving and result analysis are made by Finite Element Method (FEM). In the modelling of a structure, of a beam, applying of the torsion moment involves some difficulties especially regarding of the local stress concentration. By the methodology presented in this paper, the analysis of the shear stress field can be made with a great accuracy using FEM, without any experimental means. This methodology takes into account all the physical significations of the membrane analogy and all these are evaluated by FEM. That require of the pressure-effort ratio to be -2 is made by a thermal loading, cooling the membrane. By post-processing, the numerical result analysis can be quickly and easily made. The modelling presented in this paper can be used for any section type: whatever the shape, no matter if the section has one or more holes etc. By this methodology, the membrane analogy becomes more efficient, more versatile and more accessible for any section type.

 

Keywords: torsion, membrane analogy, finite elements

Cuvinte cheie: torsiune, analogia cu membrana, elemente finite

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32-53 ȘCOALA DE REZISTENȚA MATERIALELOR DIN UNIVERSITATEA POLITEHNICA DIN BUCUREȘTI

SCHOOL OF STRENGTH OF MATERIALS FROM POLYTECHNIC UNIVERSITY OF BUCHAREST

 

Strength of Materials School of the Polytechnic University of Bucharest has a history of nearly 150 years attested. The paper presents the steps taken by the Strength of Materials School, closely related to evolution University, personalities that contributed to the formation and development of this school, the laboratory created and its involvement in solving of problems in economy and priority directions in research.

The conclusions of the paper highlight the conditions in which it forms a school for it to persist and grow.

 

Keywords: strength of materials, stability of construction, engineering school, electrical strain gauge technique, vibrations

Cuvinte cheie: rezistenţa materialelor, stabilitatea construcţiilor, şcoală de inginerie, tensometrie electrică, vibraţii

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32-52 STUDIU DE CAZ ASUPRA TERMOIZOLAŢIILOR CLĂDIRILOR CU MATERIALE ORGANIC – NATURALE

CASE STUDY ON THERMAL INSULATION IN BUILDINGS WITH ORGANIC – NATURAL MATERIALS

 

Reducing energy consumption through the thermal insulation of buildings, including insulation using materials of organic-natural origin is a current concern of specialists. The paper analyses energy rehabilitation solutions with various materials of organic-natural origin, proving the efficiency of using low density thermo isolating materials, as well as the efficiency of using small amounts of renewable primary energy in the production of said materials.

 

Keywords: building, thermal insulation, energy consumption, material, organic, natural

Cuvinte cheie: clădire, izolaţie termică, consum energetic, material, organic, natural

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