Volumul 19


19-51 DETERMINAREA TIMPULUI DE PORNIRE A TRANSPORTOARELOR CU BANDĂ ACŢIONATE CU MOTOR ASINCRON TRIFAZAT

THE DETERMINING OF THE START TIME OF A BELT
CONVEYER DRIVEN BY A THREE-PHASE INDUCTION
MOTOR
The paper introduces an analytical method of determining the start time
of induction motors driving belt conveyers or other work machinery, which show
a constant resistant couple. This method is based on the analysis of the
transitory start condition of three-phase induction motors, showing a constant
resistant torque on the shaft.
Keywords: starting time, three-phase induction motor, conveyor
Cuvinte cheie: timp de pornire, motor asincron trifazat, bandă
transportoare
51 DETERMINAREA TIMPULUI DE PORNIRE A


19-52 OBŢINEREA ŞI CARACTERIZAREA COMPORTĂRII ELECTRICE A UNOR COMPOZITE POLIMERICE CU INCLUZIUNI ANORGANICE

L’OBTENTION ET LA CARACTÉRISATION DU
COMPORTEMENT ÉLECTRIQUE DE COMPOSÉS
POLYMÉRIQUES À INCLUSIONS INORGANIQUES
Le papier présente la modalité de réalisation de certains diélectriques
non homogènes en verre/polymère ou rutil/poymère. On indique les valeurs
des permittivités relatives et des résistivités électriques pour plusieurs
mélanges conçus et on a mis en l`évidence l`influence du diamètre des billes
de verre sur ces propriétés.
Mots-clés: diélectriques, polymères composites, la permittivité relative,
le volume de concentration, le facteur de perte
Cuvinte cheie: dielectrici, compozite polimerice, permitivitate relativă,
concentraţie volumică, factor de pierderi

52 OBŢINEREA ŞI CARACTERIZAREA COMPORTĂRII


19-53 CONSIDERAŢII PRIVIND REGIMUL TERMIC AL CONDENSATOARELOR CU DIELECTRIC SOLID LA FUNCŢIONAREA ÎN REGIM NESINUSOIDAL

CONSIDERATIONS SUR LE REGIME THERMIQUE DES
CONDENSATEURS A DIELECTRIQUE SOLIDE, AU
FONCTIONNEMENT EN REGIME NON SINUSOÏDAL
L’article présente une méthode de calcul du régime thermique des
condensateurs alimentés avec tension non sinusoïdale, en tenant compte de la
modification des pertes de puissance active du diélectrique déterminée par la
variation de la permittivité et du facteur de pertes avec la fréquence des
harmoniques.
Mots-clés: pertes diélectriques, la tension harmonique, la température,
la permittivité, facteur de perte
Cuvinte cheie: pierderi dielectrice, tensiune nesinusoidală, regim
termic, permitivitate, factor de pierderi

53 CONSIDERAŢII PRIVIND REGIMUL TERMIC AL


19-54 UTILIZAREA INDUSTRIALĂ A CONVERTOARELOR STATICE DE MARE PUTERE (I)

INDUSTRY APPLICATIONS WITH HIGH POWER STATIC
CONVERTERS
The use of AC Drives in the industry applications has seen tremendous
growth over the last 40 years with the rapid development of high-power
semiconductors, power converter topology, new control strategies, and their
implementation with the advanced digital processors. These have mode it
possible to design drives with higher VA rating, with PWM and VC/DTC.
However, this article presents a real application in Kronospan S.A.
Sebes, with an ACS 5000 ABB static frequencies converter.
Keywords: power electronics, inverters, two and three levels of voltage,
direct torque control, industrial applications
Cuvinte cheie: dispozitive electronice de putere, invertoare pe două şi
trei nivele de tensiune, control direct de cuplu, aplicaţii industriale

54 UTILIZAREA INDUSTRIALĂ A CONVERTOARELOR


19-55 UTILIZAREA INDUSTRIALĂ A CONVERTOARELOR STATICE DE MARE PUTERE (II)

INDUSTRY APPLICATIONS WITH HIGH POWER STATIC
CONVERTERS
The use of AC Drives in the industry applications has seen tremendous
growth over the last 40 years with the rapid development of high-power
semiconductors, power converter topology, new control strategies, and their
implementation with the advanced digital processors. These have mode it
possible to design drives with higher VA rating, with PWM and VC/DTC.
However, this article presents a real application in Kronospan S.A.
Sebes, with an ACS 5000 ABB static frequencies converter.
Keywords: power electronics, inverters, two and three levels of voltage,
direct torque control, industrial applications
Cuvinte cheie: dispozitive electronice de putere, invertoare pe două şi
trei nivele de tensiune, control direct de cuplu, aplicaţii industriale

55 UTILIZAREA INDUSTRIALĂ A CONVERTOARELOR


19-56 PROTECŢIA ELEMENTELOR INDUCTIVE ÎMPOTRIVA TENSIUNILOR INVERSE LA DECONECTARE (I)

THE PROTECTION OF INDUCTIV ELEMENTS
TO INVERSE TENSIONS AT TO DISCONNECT (I)
The paper presents the protection methods of inductive elements
counter to inverse tensions at to disconnect
Keywords: release voltage, the diode protection by varistors and
Zener diodes
Cuvinte cheie: tensiune inversǎ, protecţie prin diode, prin varistoare şi
diode Zener

56 PROTECŢIA ELEMENTELOR INDUCTIVE


19-57 PROTECŢIA ELEMENTELOR INDUCTIVE ÎMPOTRIVA TENSIUNILOR INVERSE LA DECONECTARE (II)

THE PROTECTION OF INDUCTIV ELEMENTS
TO INVERSE TENSIONS AT TO DISCONNECT (II)
The paper presents the protection methods of inductive elements
counter to inverse tensions at to disconnect
Keywords: release voltage, the diode protection by varistors and
Zener diodes
Cuvinte cheie: tensiune inversǎ, protecţie prin diode, prin varistoare şi
diode Zener

57 PROTECŢIA ELEMENTELOR INDUCTIVE


19-58 PROTECŢIA ELEMENTELOR INDUCTIVE ÎMPOTRIVA TENSIUNILOR INVERSE LA DECONECTARE (III)

THE PROTECTION OF INDUCTIV ELEMENTS
TO INVERSE TENSIONS AT TO DISCONNECT (III)
The paper presents the protection methods of inductive elements
counter to inverse tensions at to disconnect
Keywords: release voltage, the diode protection by varistors and
Zener diodes
Cuvinte cheie: tensiune inversǎ, protecţie prin diode, prin varistoare şi
diode Zener

58 PROTECŢIA ELEMENTELOR INDUCTIVE


19-59 DEPENDENŢA ENERGIEI ELECTRICE CONSUMATE DE CUPTORUL ELECTRIC CU ARC ÎN FUNCŢIE DE GREUTATEA ŞARJEI ELABORATE

ELECTRICAL ENERGY CONSUMPTION FOR ELECTRIC
ARC FURNACE DEPENDING TO THE WEIGHT CHARGE
This paper refers to the dependence about electrical power
consumption for electric arc furnace and charge weight. A proper dosage of
scrap reduces specific consumption of electricity.
Keywords: dependence, electric arc furnace, specific consumption
Cuvinte cheie: dependenţă, cuptor cu arc electric, consum specific

59 DEPENDENŢA ENERGIEI ELECTRICE CONSUMATE DE


19-60 REDUCEREA CONSUMULUI DE ENERGIE ELECTRICĂ LA CUPTORUL CU ARC ELECTRIC

REDUCING THE ELECTRICITY CONSUMPTION FOR
ELECTRIC ARC FURNACE
The paper presents a study of the electric arc furnace who using
Carbon-Jet and Oxygen-Jet to reduce specific consumption of energy.
Electric arc furnaces (EAF) play an important and increasing role in
modern steel work concepts. The ability to precisely control the temperature
and chemistry of the batch make EAF an ideal choice for producing high-grade
steel for the recycling of scrap. Of the steel made today 36 % is produced by
the EAF route and this share will increase to 50 by 2030.
Keywords: electric arc furnace, oxygen, carbon injection
Cuvinte cheie: cuptor cu arc electric, oxigen, carbon, injectare

60 REDUCEREA CONSUMULUI DE ENERGIE ELECTRICĂ


19-61 SISTEM DE CONTROL AL MAŞINII ASINCRONE CU ROTOR BOBINAT ÎN APLICAŢII EOLIENE

CONTROL SYSTEM OF AN WOUND INDUCTION
GENERATOR IN WIND APPLICATIONS
This paper presents a control model of a drive system with wound
induction generator and rotor converter for variable speed wind power station.
For design optimization of power and control the simulations are used.
Keywords: renewable energy, wound rotor induction generator, the rotor
converter, control, simulation
Cuvinte cheie: energii regenerabile, generator asincron cu rotor bobinat,
convertor rotoric, control, simulare

61 SISTEM DE CONTROL AL MAŞINII ASINCRONE CU


19-62 CONSIDERAŢII PRIVIND AVARIILE PRODUSE LA ARBORII TURBINELOR BULB DE LA PORŢILE DE FIER II

CONSIDERETIONS CONCERNING THE DAMAGES
CREATED ON BULB TURBINES IRON GATES II
The paper presents the damages observed, after an important time of
running, on the shafts of hydraulic bulb turbines. The damages have taken the
form of multiple cracks, generated through fatigue stresses.
Keywords: application to fatigue, hydraulic tubine bulb, cracking, corrosion
Cuvinte cheie: solicitare de oboseală, tubine hidraulice bulb, fisuri,
coroziune

62 CONSIDERAŢII PRIVIND AVARIILE PRODUSE LA


19-63 MANAGEMENTUL RISCULUI DE MEDIU ŞI SUSTENABILITATEA ÎNTREPRINDERII

ENVIRONMENTAL RISK MANAGEMENT AND
SUSTAINABLE ENTERPRISE
Risks are a daily presence in the everyday economy; they are
indicated as economic losses, damage to facilities, equipment and workplace
accidents. Risk management has developed both conceptually and in practice,
becoming an industry in countries with a functional market economy. The paper
presents mechanisms for measuring and hedging, focusing on the possible
benefits that company would get by applying well-established procedures. Risk
management is treated from the perspective of a single aspect that is part of
global management, which requires information from many fields: economic,
technical, legal, statistical and psychological, which corroborated towards
sustainable development, will lead to business sustainability.
Keywords: management, risk, enterprise sustainability, sustainable
development
Cuvinte cheie: management, risc, sustenabilitatea întreprinderii,
dezvoltarea durabilă

63 MANAGEMENTUL RISCULUI DE MEDIU ŞI


19-64 CONSIDERAŢII GENERALE ASUPRA MANAGEMENTULUI SITURILOR CONTAMINATE ÎN EUROPA

GENERAL CONSIDERATIONS REGARDING
CONTAMINATED SITES MANAGEMENT IN EUROPE
In the last three decades, contaminated sites management in Europe
has been developed as a very complex domain of the environment protection,
but lack of the EU legislation for this difficult issue led to differences between
European states. Remediation of the contaminated sites needs important
financial resources.
Keywords: potentially contaminated site, contaminated site,
remediation of contaminated sites management
Cuvinte cheie: sit potenţial contaminat, sit contaminat, remediere,
managementul siturilor contaminate

64 CONSIDERAŢII GENERALE ASUPRA


19-65 INVESTIGAREA SITURILOR CONTAMINATE ŞI ELABORAREA STUDIILOR DE FEZABILITATE PENTRU PROIECTELE DE REMEDIERE

INVESTIGATION OF CONTAMINATED SITES AND
ELABORATION OF FEASIBILITY STUDIES FOR
REMEDIATION PROJECTS
Remedial investigation and feasibility study are two major phases
within management of contaminated sites. Remedial investigation is based on
field investigation, characterization of the contamination and base risks
assessment. The feasibility study represents a process for identification the
alternatives for remediation and for deliver the best solutions to the decision
maker at the best prices and periods of time.
Keywords: contaminated site, investigation, remedial alternatives
Cuvinte cheie: sit contaminat, investigare, alternative de remediere

65 INVESTIGAREA SITURILOR CONTAMINATE ŞI


19-67 UTILIZAREA DEŞEURILOR CA SURSĂ ALTERNATIVĂ DE ENERGIE

USING WASTE AS AN ALTERNATIVE ENERGY SOURCE
Urban waste in storage can be an inexhaustible source of energy.
Under the action of bacteria, an organic substance from waste undergoes
anaerobic reduction as a result the significant amount of biogas, which contains
an average of over 50 % methane, which has a high calorific value. These
gases can be captured by a network of pipes, filters, dryers can be fuel for an
internal combustion engine driving a generator, or can be liquefied. Thus from
the waste, obtain electricity, clean energy and easy to carry. In this way all
urban landfills in Romania can become energy producers. The benefits are
enormous, in that energy from waste sites and biogas is captured with a more
powerful greenhouse gases than carbon dioxide.
Keywords: waste, alternative energy source, biogas, greenhouse, gas
Cuvinte cheie: deşeuri, sursă alternativă de energie, biogaz, efect de
seră, gaz metan

67 UTILIZAREA DEŞEURILOR CA SURSĂ


19-68 TENDINŢE ÎN PRODUCEREA MATERIALELOR BIOPLASTICE

TRENDS IN BIOPLASTICS OBTAINING
MATERIAL PRODUCTION
Bioplastics, industry and agriculture are close connected. On a side
renewable resources from agriculture are basic feedstock for bioplastics
manufacturing. On the other side, products made from bioplastc materials have
a large applicability in agriculture, and as packaging in food industry. After the
bioplastics fulfill their mean and become residues, the cycle is closed by using
them as compost for fertilizer and a soil improvement in agriculture.
This interdependence lied when about 50 million hectares in EU are
not needed for food production for new opportunities in agriculture.
Keywords: bio-materials, renewable energy, agriculture
Cuvinte cheie: materiale bioplastice, surse regenerabile, agricultură

68 TENDINŢE ÎN PRODUCEREA


19-69 VALORIFICAREA DEŞEURILOR DIN PET-URI ŞI REALIZAREA UNOR MATERIALE COMPOZITE NOI ARMATE CU PULBERI/FIBRE METALICE

PET WASTE RECOVERY AND MAKING NEW COMPOSITE
MATERIALS ARMED WITH POWDER/FIBRES METAL
Reuse of PET waste will result in prevention and environmental
protection involves use of these recycled materials subtantiale energy savings
compared to using raw materials. Making parts of recycled PET reinforced with
powders and/or metal fibers are required due to mainly support the benefits
conferred by the presence of recycled polymeric material which is lighter than
metals, which leads to increased operational efficiency.
Keywords: composite materials, recycling, PET sites
Cuvinte cheie: materiale compozite, reciclare, PET – uri

69 VALORIFICAREA DEŞEURILOR DIN PET-URI ŞI


19-70 ASPECTE PRIVIND CALITATEA APEI CA PROBLEMĂ IMPORTANTĂ PENTRU IRIGAŢII

ASPECTS REGARDING WATER QUALITY AS AN
IMPORTANT ISSUE IN IRRIGATION
In spite of progress achieved in this field, the processes taking place in
agriculture are still under the unfavorable effect of some natural factors, their
occurrence, duration and extension in space not being preventable or entirely
removed. Irrigated agriculture has an increasingly important part in
environmental protection in the rural areas, at the global level irrigation being
tributary to supply with water of good quality. Assessment of water quality must
be performed on a regular basis. Equipment developed during the phase of
experimental model has been tested at ANIF- Territorial Branch Olt – Argeş.
Sensoristics of monitoring is made of sensors for pH, electrical conductivity at
25 0C, Na+, Cl-, turbidity. This equipment performs monitoring of water quality at
the intake, at the basic pumping station.
Keywords: irrigation, irrigation water quality, monitoring equipment
Cuvinte cheie: irigaţie, apă de irigaţie, calitate, echipament de
monitorizare

70 ASPECTE PRIVIND CALITATEA APEI


19-71 CERCETĂRI EXPERIMENTALE PRIVIND DETERMINAREA INDICATORILOR DE CALITATE AI RÂULUI NADĂŞ PE TRONSONUL LOCALITĂŢII AGHIREŞU

EXPERIMENTAL STUDIES ON DETERMINATION
OF QUALITY INDICATORS OF RIVER NADĂŞ ON THE
LOCALITY AGHIREŞU SECTION
This paper aims to establish indicators of river quality Nadăş,
Aghireşu village area, to be used for agricultural and domestic water.
Keywords: water quality, surface water, chemical analysis
Cuvinte cheie: calitatea apei, apă de suprafaţă, analize chimice

71 CERCETĂRI EXPERIMENTALE PRIVIND


19-72 INFLUENŢA FACTORILOR POLUANŢI ASUPRA CALITĂŢII APEI SUBTERANE DIN LOCALITATEA DEZMIR DIN JUDEŢUL CLUJ

THE INFLUENCE OF THE POLLUTANT FACTORS ON THE
GROUNDWATER QUALITY IN DEZMIR, COUNTY CLUJ
This paper represents a study of the groundwater quality of Dezmir,
county Cluj in the context of three main pollution factors: the municipal solid
waste landfill from Pata Rât, the heavy traffic in the area and the fertilizers and
pesticides used in agriculture.
Keywords: air pollution, cultural heritage, acid rain, black crust,
monuments, degradation
Cuvinte cheie: poluarea aerului, patrimoniul cultural, ploi acide, crustă
neagră, monumente, degradare

72 INFLUENŢA FACTORILOR POLUANŢI ASUPRA


19-73 TEHNOLOGII DE DEPOLUARE A APELOR UZATE CU CONŢINUT DE METALE GRELE REZULTATE DIN SECTORUL MINIER

TECHNOLOGIES FOR REMEDIATION OF WASTE WATER
CONTAINING HEAVY METAL MINING SECTOR RESULTS
The origin of acid mine water with high content of metals is
accelerated oxidation of iron pyrite and other metal sulfides as being due to
exposure of these minerals in contact with oxygen and water, as a
consequence of metal ore processing. There are two general categories of
treatment methods that are well researched: active treatment, which requires
the use of chemical treatment systems for acid buffering and passive treatment,
which allows biological and chemical processes occurring naturally in the
system to operate outside the control of polluted effluent received.
Keywords: surface mining, heavy metals, precipitation, active
treatment, passive treatment
Cuvinte cheie: ape de mină, metale grele, precipitare, tratare activă,
tratare pasivă

73 TEHNOLOGII DE DEPOLUARE A APELOR UZATE


19-74 STAŢIE DE EPURARE PENTRU 100.000 LOCUITORI – STUDIU DE CAZ – STUDIU DE FEZABILITATE PRIVIND RETEHNOLOGIZAREA STAŢIEI DE EPURARE PITEŞTI

WASTEWATER TREATMENT PLANT DESIGNED FOR 100,000
POPULATION EQUIVALENT – CASE STUDY – FEASIBILITY
STUDY FOR UPGRADING THE TREATMENT PLANT PITESTI
The present paper presents the study of an municipal wastewater
plant which is designed for 100,000 population equivalent. The research is
focused on the feasibility study for upgrading the treatment plant Pitesti. The
aim of the refurbishment works is to rehabilitate and develop the water supply
system and sewerage, actions resulting from their aging both morally and
physically and development of socio-economic activities in the city of Pitesti.
Keywords: wastewater treatment plant, upgrading, quality indicators
Cuvinte cheie: staţie de epurare, retehnologizare, indicatori de calitate

74 STAŢIE DE EPURARE PENTRU 100.000 LOCUITORI –


19-75 EVALUAREA IMPACTULUI ECOLOGIC ASUPRA MEDIULUI DATORAT PROCESĂRII MATERIALELOR ÎNTR-O TURNĂTORIE

THE WAY TO EVALUATE THE ECOLOGICAL IMPACT
TOWARDS THE ENVIRONMENT CAUSED BY THE
PROCEDURAL OF MATERIALS IN A FOUNDRY
This paper refers to a methodology of evaluation of the ecological
impact to the environment in the case of some materials in an industry like the
one of a foundry.
Keywords: pollution, ecology
Cuvinte cheie: poluare, ecologie

75 EVALUAREA IMPACTULUI ECOLOGIC


19-76 PIROLIZA DEŞEURILOR SOLIDE PRIN PROCEDEUL „PUROX”

„PUROX” PYROLYSIS PROCESS OF SOLID WASTE
This project presents a summary of a new pyrolysis method of solid
waste in fuel gas, which is currently emerging. It explains the principle of
recovery of waste through a pyrolysis process, called „PUROX” and is given
main achievements in this field worldwide. The project highlights the
advantages and disadvantages of new methods of pyrolysis.
Keywords: endothermic process, waste water, solid waste, solid waste
Cuvinte cheie: procedeu endoterm, apă uzată, deşeuri solide, reziduu
solid

76 PIROLIZA DEŞEURILOR SOLIDE PRIN


19-77 TRATAREA DEŞEURILOR PERICULOASE DIN ACTIVITĂŢI MEDICALE

HAZARDOUS WASTE TREATMENT OF MEDICAL ACTIVITIES
According to current legislation, waste treatment from medical
activities aimed to achieving a final product of the environment and health
friendly. The most popular method treatment of these types of waste is
incineration. As an alternative to those, it has been developed installations that
do not use incineration, and today is known different alternative medical waste
treatment, of which the most commonly used are steam sterilization,
microwaves, chemical treatment, thermal treatment (pyrolysis). The paper
makes an analysis of the most used methods; we present a hybrid treatment
installation.
Keywords: waste treatment, sterilization
Cuvinte cheie: deşeuri, tratare, sterilizare

77 TRATAREA DEŞEURILOR PERICULOASE DIN


19-78 DISTRIBUŢIA MINERALELOR ÎN CENUŞA DE HUILĂ DE LA TERMOCENTRALA PAROŞENI

MINERALS DISTRIBUTION IN COAL FLY ASH FROM
PAROSENI POWER PLANT
Large ash dumps, formed in time, are a high harmful potential for
environment. Our study points out the mineral contained in fly ash resulted at
Paroşeni power plant. The X-ray diffraction analysis reveals large amounts of
quartz, mullet, potasic feldspar, Seri cite and hydrated hematite. Microscopy
investigation prove that quartz particles keeps their initial equiaxial shape
meanwhile higher amount of mullet and hematite feature spherical shape due
to their melting during coal burning. The quantitative microscopic analysis
reveals three particles domains: the larger one having the average diameter of
100 μm, the intermediary one having the average diameter of 44 μm, and the
finest one having the average diameter of 23 μm. Quartz particles are often
found in the larger particle range, hematite hydrate and mullet are often found
in the intermediary particle range, meanwhile feldspar and Seri cite are situated
mainly in the finest particle range.
Keywords: ash, coal, power plant
Cuvinte cheie: cenuşă, huilă, termocentrală

78 DISTRIBUŢIA MINERALELOR ÎN CENUŞA DE HUILĂ


19-79 POLUAREA SONORĂ

NOISE POLLUTION
Noise pollution is a danger that threatens population and environment
along with other factors such as: gas emissions in the atmosphere, the
discharge of waste water with dangerous substances content on soil and water,
storage of waste on the ground.
It is found that both sounds, how much and infra-sounds and ultra –
sounds have adverse effects on humans. The most important source of noise in
the larger cities is road traffic generated by the friction of the wheels on the
asphalt and packaging the engines.
To reduce the noise level of the individual measures are taken which
are the personal discipline, and technical measures covered by the obscuration
of the source of noise, protected housing, which is situated the antiphon rooms
noisy plants, screens phonoabsorbant for highways.
Keywords: noise, electromagnetic radiation, mechanical waves, noise,
noise monitoring, environmental noise, noise management
Cuvinte cheie: poluare sonoră, radiaţii electromagnetice, unde
mecanice, zgomot, monitorizarea poluării sonore, zgomotul în mediu,
managementul zgomotului

79 POLUAREA SONORĂ


19-80 MODELAREA COLOANELOR DE DESORPŢIE UTILIZATE ÎN CAPTAREA DIOXIDULUI DE CARBON

MODELLING OF DESORPTION COLUMNS
USED IN CARBON CAPTURE
PROCESSES
As the CO2 emissions continue to grow due to the increase in demand
of cement, steel, iron, ammonia, natural gas and other products that in the
process of manufacturing produce significant CO2 emissions an alternative
solution needs to be found. The solution is represented by adsorptiondesorption
processes that are being used to capture CO2. This paper will focus
on the desorption column and a modelling algorithm will be presented based on
first principle equations.
Keywords: adsorption desorption, reactive distillation, CO2
Cuvinte cheie: adsorpţie-desorpţie, distilare reactivă, CO2

80 MODELAREA COLOANELOR DE


19-81 NOTE PRIVIND MODELAREA MATEMATICĂ A UNOR SISTEME SPECIALE

NOTES ON THE MATHEMATICAL MODELING
OF SOME KIND OF SPECIAL SYSTEMS
The paper discusses a brief view on a mathematical approach of a
special kind of systems: the financial services.
Keywords: mathematical modeling, finance, financial product
Cuvinte cheie: modelare matematică, finanţe, produs financiar

81 NOTE PRIVIND MODELAREA MATEMATICĂ


19-82 SIMULAREA FUNCŢIIOR LOGICE PNEUMATICE, UTILIZÂND SOFTUL FLUIDSIM PNEUMATIC

LOGICAL PNEUMATICS FUNCTION SIMULATED, USING
FLUIDSIM PENUMATICS SOFTWARE
This paper presents the realization of the main pneumatic logic
functions, using FluidSim Pneumatics software.
Keywords: logic functions, software, pneumatic, Fluids
Cuvinte cheie: funcţii logice, software, pneumatica, FluidSim

82 SIMULAREA FUNCŢIIOR LOGICE PNEUMATICE,


19-83 TEHNOLOGII INTEGRATE SAP ACTUALE DE DEZVOLTARE A APLICAŢIILOR WEB BUSINESS

CURRENT TECHNOLOGIES SAP BUSINESS WEB
APPLICATIONS DEVELOPMENT
Nowadays it tends to use client-server applications based on the Web
that are very effective if the number of users in system is large or very large.
Each company has a network and a browser. This paper presents a study on
current SAP technologies integrated for development of the Web applications
for enterprises.
Keywords: Web technologies, integrated software systems, Web
applications, business, Business Server Pages, Web Dynpro
Cuvinte cheie: tehnologii Web, sisteme software integrate, aplicaţii
Web business, Business Server Pages, Web Dynpro

83 TEHNOLOGII INTEGRATE SAP ACTUALE DE


19-84 MODALITĂŢI DE EVITARE A REZONANŢEI PE TIMPUL TRAGERILOR DINTRE FRECVENŢA PROPRIE DE OSCILAŢIE A TEVILOR DE ARMAMENT ŞI CEA A FORŢELOR PERTURBATOARE

WAYS OF AVOIDING THE TIME LUCKY RESONANCE
NATURAL FREQUENCY OF OSCILLATION OF BETWEEN
THE PIPES AND THE WEAPONS OF FORCES DISTURBANCE
This paper presents a theoretical model and practical approach in the
comparative study of the natural vibration frequencies of the system during
firing weapons and the spectrum of disruptive forces.
Keywords: spectrum, disruptive forces, resonance, breath of fire,
shooting rhythm, plan drawing, the center of mass
Cuvinte cheie: spectru de frecvenţe, forţe perturbatoare, rezonanţă,
gură de foc, cadenţă de tragere, plan de tragere, centru de masă

84 MODALITĂŢI DE EVITARE A REZONANŢEI PE TIMPUL


19-85 EVOLUŢIA PARAMETRILOR ATMOSFERICI ÎN PREZENŢA UNDEI DE ŞOC CAUZATĂ DE DETONAŢIA UNEI ÎNCĂRCĂTURI EXPLOZIVE

ATMOSPHERIC PARAMETERS IN THE PRESENCE
OF SHOCK WAVE CAUSED DETONATION OF AN
EXPLOSIVE CHARGE
The paper presents results of recent research on the effects of
detonation of explosive charges on the Earth’s atmosphere. Developments are
studied environmental parameters, temperature, pressure, speed, in the
presence of the shock wave.
Key words: detonation, explosive charge, blast, shock wave front, and
state variables
Cuvinte cheie: detonaţie, încărcătură explozivă, undă de şoc, frontul
undei de şoc, parametri de stare

85 EVOLUŢIA PARAMETRILOR ATMOSFERICI ÎN


19-86 CONSIDERAŢII PRIVIND CURGEREA GAZELOR PRIN TUBURI CU DIAMETRE MICI

CONSIDERATIONS ON GAS FLOW THROUGH SMALL
DIAMETER TUBES
The paper refers to the study of movement of gas through small
diameter tubes. It customizes the case when the movement is considered onedimensional
mass-exchange, heat and mechanical work outside. Research
results are a tool in the design of small diameter pipes weapons.
Keywords: mass flow, one-dimensional motion, ballistics, power line
Cuvinte cheie: debit masic, mişcare unidimensională, balistică, linie de curent

86 CONSIDERAŢII PRIVIND CURGEREA GAZELOR


19-87 LABORATORUL DE REZISTENŢA MATERIALELOR DIN FACULTATEA DE INGINERIE HUNEDOARA LA A 40-A ANIVERSARE

THE STRENGTH OF MATERIALS LABORATORY FROM
THE FACULTY OF ENGINEERING HUNEDOARA,
AT ITS 40th ANNIVERSARY
The paper focuses on presenting the Strength of Materials Laboratory
at its 40th anniversary. This lab has significantly contributed to the practical
training of the students, nevertheless playing an important part in performing
mechanical and technological experiments for Bachelor, Masters and PhD
topics as well as for various research grants.
Keywords: mechanical and technological tests, samples, test stands
Cuvinte cheie: încercări mecanice şi tehnologice, epruvete, standuri
experimentale

87 LABORATORUL DE REZISTENŢA MATERIALELOR


19-88 E,G ŞI  – CARACTERISTICI ELASTICE ALE MATERIALELOR

E, G ET  – CARACTÉRISTIQUES ÉLASTIQUES DES
MATÉRIAUX
On présente les contributions fondamentales des scientifiques –
mathématiciens et mécaniciens – au développement de la Résistance des
Matériaux et de la Théorie de l’Élasticité. T. Young, Ch. A. de Coulomb et S.D.
Poisson ont lié leurs noms – entre autres – aux paramètres qui définissent les
caractéristiques élastiques des matériaux: les modules d’élasticité (E et G) et le
coefficient de contraction transversale (). On souligne le fait que sans
connaître le plus exactement possible les valeurs de ces constantes, il devient
pratiquement impensable de concevoir et de réaliser rationnellement les
diverses structures mécaniques modernes.
Mots-clés: applications, barres, poutres, ressorts, plaques, le stress, la
tension, modules élastiques: longitudinale et transversale contraction
transversale coefficient, la conception rationnelle
Cuvinte cheie: solicitări, bare, grinzi, resorturi, plăci, tensiuni,
deformaţii, module de elasticitate: longitudinală şi transversală, coeficient de
contracţie transversală, proiectare raţională

88 E,G ŞI  – CARACTERISTICI ELASTICE ALE


19-89 LEGEA LUI HOOKE ÎNTR-O ABORDARE PLURIDISCIPLINARĂ

HOOKE’S LAW IN A MULTIDISCIPLINARY APPROACH
This paper presents the Hooke’s law treatment from a multidisciplinary
perspective. This approach requires owners of competence in these areas:
Informatics, Technical Drawing, Mechanics and Physics. Multidisciplinary study
refers to an object in one and the same discipline by means of several
disciplines at once.
Keywords: transdisciplinarity, interdisciplinary, multidisciplinary, metacognitive
skills, key skills, erosive agent, transgression, deforming force, tension (unit effort)
Cuvinte cheie: transdisciplinaritate, interdisciplinaritate, pluridisciplinaritate,
competenţe metacognitive, competentele cheie, agent eroziv,
transgresiune, forţă deformatoare, tensiune (efort unitar)

89 LEGEA LUI HOOKE ÎNTR-O ABORDARE


19-90 DETERMINAREA GRAFO-ANALITICĂ PE BAZA FRECVENŢEI PROPRII A ADÂNCIMII DEFECTULUI LA BARE ÎNCASTRATE

GRAPHIC-ANALYTICAL METHOD FOR DAMAGE DEPTH
DETERMINATION BASED ON NATURAL FREQUENCIES
AT CANTILEVER BEAM
The paper presents research results of authors in determining of the
damage depth for a cantilever beams by using natural frequencies. A graphicanalytical
method is proposed which permit to evaluate the damage depth and
localize the position of the damage on the beam length. The method is based
on results obtained from the numerical modal analysis for the first ten modes of
vibration. Experimental tests have confirmed the method and the results have
application in non-destructive examination based on vibration analysis.
Keywords: natural frequencies, defect, depth, bar mixer
Cuvinte cheie: frecvenţe proprii, defect, adâncime, bară încastrată

90 DETERMINAREA GRAFO-ANALITICĂ PE BAZA


19-91 ARBORE DE DISTRIBUŢIE TUBULAR AL MOTORULUI CU ARDERE INTERNĂ

TUBULAR CAMSHAFT FOR INTERNAL
COMBUSTION ENGINE
The current paper presents the results of the study to investigate the
possibility of replacing the conventional camshaft of an internal combustion
engine, with a hollow, tubular cross section camshaft.
In the conventional form the camshaft is stamped or forged, and made
of iron, having a full circular section. The proposed tubular camshaft is made
out of steel, and the cams are attached by shrinking-on the shaft. We have
considered three constructive variants of the tubular camshaft.
The strain state and the tensions of the classical camshaft and the
three constructive variations of the tubular camshaft were examined using the
finite element method.
Keywords: tree distribution, strain, stress, finite element method
Cuvinte cheie: arbore de distribuţie, deformaţii, tensiuni, metoda
elementelor finite

91 ARBORE DE DISTRIBUŢIE TUBULAR


19-92 VARIANTE CONSTRUCTIVE PENTRU UN CAPTOR LAMELAR DE FORŢĂ DE 3 kN

CONSTRUCTION OPTIONS FOR A LAMELLAR
FORCE TRANSDUCER OF 3 kN
This paper presents the results of the study to design a lamellar force
transducer of 3 kN. We analysed and presented eight variants of the elastic
element of the transducer. All variants of the elastic element having the same
constructive dimensions. For each constructive variant we performed an
analysis of the state of stress and the state of strain using finite element
method. Choosing the best final variant was done taking into account the
variation of strains and tensions.
Keywords: force sensor, elastic element, finite element method
Cuvinte cheie: captor de forţă, element elastic, metoda elementelor finite

92 VARIANTE CONSTRUCTIVE PENTRU UN


19-93 SIMULAREA CU AJUTORUL METODEI ELEMENTELOR FINITE A ÎNCERCĂRII LA COMPRESIUNE A ARCULUI ELICOIDAL EXTERIOR AL BOGHIULUI Y 32 R

SIMULATION USING FINITE ELEMENT METHOD IN
COMPRESSION TEST EXTERIOR BOGIE
SCREW ARC R 32 Y
This study aimed to simulate the finite element method of compression
test CAD model of the outer helical spring is part of the bogie frame Y32R. The
simulation sought to obtain verification of reception of the main features of the
arc, such as height L0 pregnancy due dates arc empty wagon (P0) and tensile
strength of steel at the load P given by overloaded wagon.
Making simulation using Finite Element Method implies a CAD model
of the helical spring outer model was developed using Solid Works 2005
software package. Subsequently, this model has undergone in the simulation
software package COSMOS Works 2005.
Keywords: finite element, stress, arrow nodal, elongation
Cuvinte cheie: elemente finite, tensiuni, săgeată nodală, alungire

93 SIMULAREA CU AJUTORUL METODEI ELEMENTELOR


19-94 STUDIUL ANALITIC ŞI NUMERIC AL DEPLASĂRILOR PENTRU O GRINDĂ ARTICULATĂ

THE ANALYTICAL AND NUMERICAL STUDY
OF DISPLACEMENTS FOR AN ARTICULATED BEAM
In this paper had realized an analytical and numerical study to
determine the displacements and stresses for an articulated square beam
loaded to bending. To realize this study had considered the following two
cases: a) the beam is continuous and b) the beam has a joint in the middle. For
numerical analysis had used the ANSYS 12.1 (for static and dynamic analysis)
and RDM software and for analytical study had used the relations from
literature.
Keywords: articulated beam, displacements, stresses, finite element
Cuvinte cheie: grindă articulată, deplasări, tensiuni, elemente finite

94 STUDIUL ANALITIC ŞI NUMERIC AL


19-95 MODIFICAREA STRUCTURII PORTANTE A VAGOANELOR CISTERNĂ ÎN VEDEREA CREŞTERII SARCINII PE OSIE ŞI MICŞORAREA TAREI VEHICULULUI

TANK WAGON BODY CHANGING IN PURPOSE TO
INCREASE AXLE LOAD AND TARE VEHICLE DECREASING
Lifetime of a railway wagon is around 30 year. During that time,
periodical revisions are made. In some cases, the wagon is subject to
modernization programs, which can prolong the lifetime of the wagon to 40
years or more. In some cases the wagon’s owner wish to increase wagonload
capacity in purpose to transport more, because 1 tone of load can increase
exponentially the value of the wagon.
Keywords: tank wagon, finite elements, Ansys, increasing container capacity
Cuvinte cheie: vagon cisternă, elemente finite, Ansys, creşterea
capacităţii recipientului

95 MODIFICAREA STRUCTURII PORTANTE A


19-96 FACTORUL DE INTENSITATE AL TENSIUNII (KI) PENTRU O CONDUCTĂ DE ABUR SUPUSĂ NUMAI LA ŞOC TERMIC (ΔθS)

STRESS INTENSITY FACTOR (KI) FOR A STEAM PIPE
SUBJECTED ONLY TO THERMAL SHOCK (ΔθS)
The temperature of a steam pipe is variable because of the steam
pressure variation inside of it. If the steam temperature variation takes place
during a short time, the steam is subjected under a thermal shock. The effect of
the thermal shock is superimposed on the effect of the mechanical load, going
to an additional load on the pipe. The thermal shocks are dangerous for the
strength elements.
In the paper is presented the variation of stress intensity factor of a
steam pipe subjected only to thermal shock.
Keywords: steam pipe, longitudinal cracks, thermal shock
Cuvinte cheie: conductă de abur, fisură longitudinală, şoc termic

96 FACTORUL DE INTENSITATE AL TENSIUNII (KI)


19-97 LOCALIZAREA DEFECTULUI ÎN BARE ÎNCASTRATE UTILIZÂND INDICELE ABATERII RELATIVE A FRECVENŢELOR PROPRII

LOCALIZATION OF DAMAGE IN CANTILEVER BEAMS USING
THE RELATIVE SHIFT IN NATURAL FREQUENCIES
This paper presents a method to locate the damages in cantilever
beams based on relative shift in natural frequencies. This method takes in to
account the particular manner in which the natural frequencies of the first then
modes change due to the occurrence of damage. The measured frequencies
changes are a compared with values contained in a databases, determined on
models using the finite element method. For these databases we consider a
large number of damages locations. By comparing the changes in frequencies
obtained trough measurements with those determined on models, for the first
ten vibration modes, it was possible to locate damages with high accuracy.
Keywords: vibration, bar mixer, frequencies, detecting defects
Cuvinte cheie: vibraţii, bară încastrată, frecvenţe proprii, detectarea
defectelor

97 LOCALIZAREA DEFECTULUI ÎN BARE ÎNCASTRATE


19-98 ÎNCERCĂRI TENSOMETRICE EFECTUATE LA ŞASIUL LOCOMOTIVELOR CU ABUR

STEAM LOCOMOTIVE FRAME EXPERIMENTAL
STRESS ANALYSIS
Experimental stress analysis with strain transducers bases where
discovered by Kelvin in 1850. Wheatstone bridge was already known from 1833
(it was made by Hunter Christie) was developed by Charles Wheatstone in
1843. In Romania experimental stress analysis method for railway vehicles is
used from 1960. The first testing laboratory was in now known Romanian
Railway Authority.
Keywords: steam engine, vibrates, tensometers
Cuvinte cheie: locomotivă cu abur, frem1, tensometrie

98 ÎNCERCĂRI TENSOMETRICE EFECTUATE


19-99 APLICAREA RECOMANDĂRII OIML R60-91 & ANEXA A-93 LA ÎNCERCAREA DE MODEL A CELULELOR DE CÂNTĂRIRE

L’APPLICATION DE LA RECOMMANDATION OIML
R60-91 & ANNEXE A-93 À L’ESSAI DE MODÈLE
POUR LES CELLULES DE PESÉE
Le travail se réfère aux performances métrologiques de 15 types des
cellules de pesée livrées par 11 constructeurs de 8 pays dans l’intervalle 1997-
2000, utilisant les résultats obtenus à l’essai de modèle (homologation
métrologique) des cellules conformément à la Recommandation Internationale
OIML R60-91. Les résultats expérimentaux ont été interprétés et présentés
d’après les rigueurs de l’Annexe A-93 de cette Recommandation. Finalement
on présente la dynamique des essais de modèle des cellules de pesée
effectués par l’Institut National de Métrologie (INM) Laboratoire de Timişoara
dans la période 1992-2000.
Keywords: load cells, test model, International Recommendation R60-
91 & Appendix A-93
Cuvinte cheie: celule de cântărire, încercare de model,
Recomandarea Internaţională R60-91 & Anexa A-93

99 APLICAREA RECOMANDĂRII OIML R60-91 &


19-100 STUDIUL FORŢELOR CARE ACŢIONEAZĂ ASUPRA OSULUI FEMURAL

STUDY OF FORCES THAT ARE APPLIED
ON THE FEMORAL BONE
The paper presents a general view over the biomechanics of the
femoral bone. The theme is treated both from the static (simple unipodal
stand) and dynamic (walking) perspective. The direction of the force that is
applied on the femoral bone as well as it’s value represent one of the main
infect in the forthcoming of the fracture. Their studies have a true importance
in the field of researching the appearance of fractures and the causes that
precede them.
Keywords: bone, human leg, hip bone, human walking
Cuvinte cheie: ţesut osos, membru inferior uman, os femural,
mersul uman

100 STUDIUL FORŢELOR CARE ACŢIONEAZĂ


19-101 UNELE ASPECTE PRIVIND PROIECTAREA ŢEVILOR ARMAMENTULUI DE INFANTERIE

TUBE DESIGN ON SOME ASPECTS OF
INFANTRY WEAPONS
This paper presents the pattern of modern interior design small arms
pipes. This model is a handy tool for optimizing military specialists’ constructive
characteristics of the pipes.
Keywords: rifled barrel, internal ballistics, finite element, the buoyant
spiral, mesh, design variables, objective function
Cuvinte cheie: ţeavă ghintuită, balistică interioară, element finit, spirală
arhimedică, discretizare, variabile de proiectare, funcţie obiectiv

101 UNELE ASPECTE PRIVIND PROIECTAREA