Arhive zilnice: decembrie 29, 2013

23-51 SURSĂ REGLABILĂ DE TENSIUNE ÎN COMUTAȚIE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Corina Daniela CUNȚAN Ioan BACIU la de

ADJUSTABLE IN COMMUTATION VOLTAGE SOURCE
The paper presents an adjustable in commutation self-oscillating voltage
source which permits the control of the output voltage through a digital
command. The command can be made from a PC or from a microcontroller
module that controls a specialized integrated circuit, namely UC3842B. This
forms variable duration pulses of the in commutation transistor according to the
input signal.
The source has galvanic isolation in the feedback loop to assure safety.
Cuvinte cheie: sursă în comutaţie, comandă digitală, optocuplor, buclă
de reacţie, conversie analog-numerică
Keywords: source commutation, the digital command, optocoupler,
reaction, the conversion loop analog-digital

23-51 SURSĂ REGLABILĂ DE TENSIUNE ÎN COMUTAȚIE

23-52 SECURITATEA FUNCŢIONALĂ A SISTEMELOR ELECTRICE/ELECTRONICE/ELECTRONICE PROGRAMABILE REFERITOARE LA SECURITATE ÎN STANDARDIZAREA NAŢIONALĂ ŞI INTERNAŢIONALĂ

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Florin Neacşu la de

FUNCTIONAL SAFETY OF
ELECTRICAL/ELECTRONIC/PROGRAMMABLE
ELECTRONIC SAFETY-RELATED NATIONAL
AND INTERNATIONAL STANDARDIZATION
This article aims to help the designers, users, and certification bodies
of electrical/electronic/programmable electronic safety-related systems to
understand the origins and principals of functional safety identify the standards
available for guidance and give practical advice on designing, applying,
verifying and validating a “functional” safety related control system to
machinery. It is based on SR EN 61508, series of standards.
Cuvinte cheie: securitate funcțională, sisteme electrice, electronice,
electronice programabile, nivel de integritate
Keywords: functional safety, electrical systems, electronic,
programmable electronics, level of integrity

23-52 SECURITATEA FUNCŢIONALĂ A SISTEMELOR ELECTRICE

23-53 DESCĂRCĂRI SUB FORMĂ DE TRĂSNET. RISCURI/PERICOLE – partea I-a

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Garibald POPESCU la de

DOWNLOADS IN THE FORM OF LIGHTNING.
RISKS/HAZARDS – part I –
The article presents: terminology; the main risks/hazards arising
from electricity atmospheric effects; risk/danger of the fibrillation lightning
current through the human body; risks\/hazards generated by downloads in
the form of globular lightning; preventive measures for the management of
risks/hazards that can be generated from domestic if in the form of lightning
discharges; preventive measures for the management of risks\/hazards
other than domestic ones, which can be generated in the case of landings in
the form of lightning strikes
Cuvinte cheie: trasnet, descarcari, terminologie, riscuri/pericole,
electricitate atmosferica, trasnet globular, control, prevenire
Keywords: lightening, downloads, terminology, risks/hazards,
atmospheric electricity, lightning ball, control, prevention

23-53 DESCĂRCĂRI SUB FORMĂ DE TRĂSNET.

23-54 DESCĂRCĂRI SUB FORMĂ DE TRĂSNET. RISCURI/PERICOLE – partea a II-a

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Garibald POPESCU la de

DOWNLOADS IN THE FORM OF LIGHTNING.
RISKS/HAZARDS – part II –
The article presents: terminology; the main risks/hazards arising from
electricity atmospheric effects; risk/danger of the fibrillation lightning current
through the human body; risks\/hazards generated by downloads in the form of
globular lightning; preventive measures for the management of risks/hazards
that can be generated from domestic if in the form of lightning discharges;
preventive measures for the management of risks\/hazards other than domestic
ones, which can be generated in the case of landings in the form of lightning
strikes
Cuvinte cheie: trasnet, descarcari, terminologie, riscuri/pericole,
electricitate atmosferica, trasnet globular, control, prevenire
Keywords: lightening, downloads, terminology, risks/hazards,
atmospheric electricity, lightning ball, control, prevention

23-54 DESCĂRCĂRI SUB FORMĂ DE TRĂSNET.

23-55 MĂSURAREA CARACTERISTICILOR METEO PENTRU DETERMINAREA POTENŢIALULUI EOLIAN. MĂRIMI, INSTRUMENTE, MODALITĂŢI DE STOCARE A VALORILOR MĂSURĂTORILOR ŞI INCIDENTE CARE POT SĂ APARĂ LA ÎNREGISTRAREA ŞI TRANSMISIA DATELOR

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Adrian CUZMOŞ Constantin Viorel CÂMPIAN Cosmin DUMBRAVĂ Ioan ION la de

WEATHER FEATURES MEASUREMENTS PERFORMED
TO EVALUATE THE WIND POTENTIAL.
VALUES, MEASUREMENT INSTRUMENTS, WAYS TO
STORING MEASUREMENT VALUES AND INCIDENTS
THAT MAY OCCUR IN DATA TRANSMISSIONS
To evaluate the wind potential for a location must be know the average
multiannual values of the weather features for her. These can be computed
based on measured values. The measurement can be performed using several
types of installations, which are initially set the time range for which the weather
feature values are averaged. In this process incidents can occur, which results
in wrong data.
The cause that generate lack of measurements data can be related to
the support pillars, installation and/or sensors and the calculation equipment,
storage and data transmission over the internet.
Cuvinte cheie: meteo caracteristici, senzori, transmisii de date, reţea
GSM, incidente în datele măsurătorilor şi audiovizualului, incidente
Keywords: weather features, sensors, data transmission, GSM
network, incidents in data measurements and broadcasting, incidents

23-55 MĂSURAREA CARACTERISTICILOR METEO PENTRU DETERMINAREA POTENŢIALULUI EOLIAN.

23-56 INFLUENŢE ASUPRA MIŞCĂRII MASELOR DE AER. CONSIDERAŢII FUNDAMENTATE PE VALORILE MĂSURĂTORILOR EXPERIMENTALE DE LA STÂLPI ANEMOMETRICI

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Adrian CUZMOŞ Constantin Viorel CÂMPIAN Cosmin DUMBRAVĂ Ioan ION la de

INFLUENCES ON THE MOVEMENT OF AIR MASSES.
CONSIDERATIONS BASED ON THE EXPERIMENTAL
VALUES OBTAINED FROM ANEMOMETRIC PILLARS
In the initial management of an investment for the realization of a wind
generator farm, the most important activity is the evaluation of the target area.
The evaluation has to take in to account the existence of the electrical network
to acquire electricity, the access roads for installing and further supervising of
the equipment’s, the environmental impact etc. The most important factor in
making decision is the wind potential. It is determined from measurements
using special installation and depends entirely on relief and climate, actually by
the geographic area.
Cuvinte cheie: meteo caracteristici, potenţialul de vânt, viteza vântului,
de relief, clima, loc geografic
Keywords: weather features, wind potential, wind velocity, relief,
climate, geographical place

23-56 INFLUENŢE ASUPRA MIŞCĂRII MASELOR DE AER. CONSIDERAŢII FUNDAMENTATE PE VALORILE MĂSURĂTORILOR EXPERIMENTALE

23-57 APLICAREA INGINERIEI INVERSE PENTRU RECONSTRUCŢIA GEOMETRIEI UNUI ROTOR

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Dănuţ FLOREA Dorian NEDELCU Raoul AVASILOAIE la de

THE REVERSE ENGINEERING OF A RUNNER
The objective of the application is to describe the reverse engineering
stages to transform a real runner into a virtual geometry, using the Noomeo
Optinum 3D scanner, Numisoft and Rapidform XOR3 software.
Cuvinte cheie: Inginerie inversă, scaner 3D, rotor
Keywords: Reverse Engineering, 3D scanner, runner

23-57 APLICAREA INGINERIEI INVERSE PENTRU RECONSTRUCŢIA GEOMETRIEI UNUI ROTOR

23-58 ANALIZA NUMERICĂ A TENSIUNILOR REMANENTE DINTR-O PIESĂ TURNATĂ

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan Aurel CHERECHEŞ Mircea BEJAN la de

NUMERICAL ANALYSYS OF RESIDUAL STRESSES
IN A CASTING
In this paper, the authors study the evolution of the residual stresses
that arise in a water drinker (used in animal husbandry), during casting. The
residual stresses are determined by simulation using a numerical method
(control volume).
Cuvinte cheie: tensiuni remanente, turnare, simulare numerică,
adăpătoare
Keywords: residual stresses, casting, numerical simulation, water
drinker

23-58 ANALIZA NUMERICĂ A TENSIUNILOR REMANENTE

23-59 ANALIZA EXPERIMENTALĂ A TENSIUNILOR REMANENTE DINTR-O PIESĂ TURNATĂ

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan Aurel CHERECHEŞ Mircea BEJAN Mircea Cristian DUDESCU la de

EXPERIMENTAL ANALYSYS OF RESIDUAL STRESSES
IN A CASTING
In this paper, the authors study the residual stresses that arise in a
water drinker (used in animal husbandry). The residual stresses are being
determined experimentally using blind hole method.
Cuvinte cheie: tensiuni remanente, metoda găurii oarbe cu martor de
deformație, adăpătoare
Keywords: residual stresses, blind hole method, water drinker

23-59 ANALIZA EXPERIMENTALĂ A TENSIUNILOR REMANENTE DINTR-O PIESĂ TURNATĂ

23-60 TRADUCTOR ELECTRIC REZISTIV REUTILIZABIL

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Gheorghe Aurel GHERMAN la de

REUSABLE ELECTRO-RESISTIVE TRANSDUCER
This paper presents a Reusable Electro-Resistive Transducer for
measuring deformation of the structures of resistance during their operation.
The sensitivity of this sensor is close to the classical Electrical Resitance Strain
Gauge as having the same base of measurement. The proposed reusable
transducer’s advantage is that it can be reused several times at different
measuring points. In this manner, essential cost reductions are to be made to
the experimental measurements of stress and strain.
Cuvinte cheie: tensometrie electrică rezistivă, deformaţii, tensiuni
Keywords: tensometrie electrical resistive, strains, tension

23-60 TRADUCTOR ELECTRIC REZISTIV REUTILIZABIL

23-61 SISTEME DE ACȚIONARE PE BAZĂ DE SILFOANE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Dan MÂNDRU Vasile Sergiu JIȘA la de

BELLOWS ACTUATING SYSTEMS
This paper propose a thorough theoretical and experimental research
on bellows actuators in order to design and develop some operated bellows
actuators systems with at most three degree of freedom (DOF) with different
options of corrugated items, the final scope being to establish a precise method
of motion control. It is expected that most representative applications of
actuators investigated will fit in field of biomedical engineering.
Cuvinte cheie: silfoane, elemente tubulare gofrate, actuatori
Keywords: bellows, corrugated tubular elements, actuators

23-61 SISTEME DE ACȚIONARE PE BAZĂ DE SILFOANE

23-62 DETERMINAREA FRECVENŢELOR PROPRII ALE BARELOR COTITE

Această intrare a fost publicată în 2013 Revista Volumul 23 și etichetată Florian MUNTEAN Gilbert Rainer GILLICH Zeno-Iosif PRAISACH la de

DETERMINING THE NATURAL FREQUENCIES
OF BENDED BEAMS
This paper presents the natural frequencies obtained from modal
analysis, performed with ANSYS software, for the first 60 vibration modes of a
bended bar (L shape) without defect and with defects situated on three different
locations along the column. The research was made in order to highlight the
changes of the structure’s dynamic behaviour in terms of natural frequencies.
Cuvinte cheie: frecvenţe proprii, bara cotită, detectarea defectelor, simulare
Keywords: natural frequencies, bended beam, damage detection, simulation

23-62 DETERMINAREA FRECVENŢELOR PROPRII

 

23-63 CONSIDERAȚII ASUPRA VIBRAȚIILOR DIN SUSPENSIA VEHICULELOR FEROVIARE ȘI MĂSURAREA LOR

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan VIDICAN Mircea BEJAN la de

REFLECTIONS ON RAILWAY
VIBRATION VEHICLE SUSPENSIONS
Making a simple mechanical model railway vehicle must contain
masses suspended bogie and vehicle weight box connected by elastic and
dynamic elements. Thus, the suspension of railway vehicles consists of elastic
elements, connecting elements, and shock. Vibration measurements of elastic
element (or set of elastic elements) of a railway vehicle suspension requires a
stand to simulate operating conditions. This paper presents such a stand which
operates as a vibrator.
Cuvinte cheie: model mecanic, vibrații, suspensiile vehiculelor
feroviare, stand de simulare și măsurare, vibrator
Keywords: mechanical design, vibrations, suspension rail vehicle
simulation and measurement stand, vibrating

23-63 CONSIDERAȚII ASUPRA VIBRAȚIILOR DIN

23-64 CONSIDERAȚII DESPRE AMORTIZOARELE MAGNETOREOLOGICE LA VEHICULELE FROVIARE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan VIDICAN Mircea BEJAN Radu MUREŞAN la de

MAGNETORHEOLOGICAL DAMPERS CONSIDERATIONS
RAILWAY VEHICLES
This paper presents with a new type of hydraulic damper cylinder in
which fluid is a special fluid called magneto rheological fluid. If this liquid is in a
magnetic field when it changes its rheological properties of.
The magnetic field is stronger with the increasing liquid viscosity.
Cuvinte cheie: lichid, amortizor, câmp magnetic, vâscozitate
Keywords: liquid, damper, magnetic field, viscozity

23-64 CONSIDERAȚII DESPRE AMORTIZOARELE MAGNETOREOLOGICE LA VEHICULELE FROVIARE

23-65 ANALIZA DISPOZITIVELOR DE IZOLARE SEISMICĂ DIN ELASTOMERI FĂRĂ ŞI CU INIMĂ DE PLUMB

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Gilbert Rainer GILLICH Vasile IANCU la de

ANALYSIS OF ELASTOMERIC INSULATORS
WITHOUT AND WITH LEAD HEART
Seismic isolation using neopren rubber bearings or lead rubber bearings
is achieved by inserting these devices between the infrastructure and the
superstructure in order to retrieve and dissipate seismic energy so that the
constructions will not by damage.
These devices are designed and built according to the size, complexity,
degree of loading and seismic zone where the construction will be located.
Cuvinte cheie: izolator, elastomer, inimă de plumb, rigiditate
Keywords: insulator, elastomer, lead heart, stiffness

23-65 ANALIZA DISPOZITIVELOR DE IZOLARE SEISMICĂ

23-66 VIBRAŢIILE MECANICE CA O MODALITATE DE TRATAMENT

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Mariana ARGHIR Raul Ștefan FODOR Sergiu Dan VESCAN la de

VIBRATION AS A TREATMENT MODALITY
Whilst exposure to vibration is traditionally regarded as perilous,
recent research has focused on potential benefits. Acute physiological
responses to isolated tendon and muscle vibration and to whole body vibration
exercise are reviewed, as well as the training effects upon the musculature,
bone mineral density and posture. Possible applications in sports and medicine
are discussed. Vibration training also seems to improve balance in subpopulations
prone to fall, such as frail elderly people.
Cuvinte cheie: musculare vibraţii, modalitatea de tratament
Keywords: muscle vibration, treatment modality

23-66 VIBRAŢIILE MECANICE CA O MODALITATE

23-67 STUDIU TEORETIC ASUPRA APLICABILITĂȚII IMPEDANȚEI MECANICE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Anamaria BIRIŞ Claudiu Alin GLIGOR Mariana ARGHIR la de

THEORETICAL STUDY ON THE APPLICABILITY OF
MECHANICAL IMPEDANCE
The present paper will be a presentation of the informations from
specialized literature and international standards about the importance of
mechanical impedance study for all structures including human body.
Exposure to harmful vibrations can lead to damages of the structures
and health problems or disorders that can appear at the human body.
The knowledge of the structures and human body mechanical
impedance is essential for realizing appropriate administrative, technical and
medical prevention measures.
Cuvinte cheie: impedanță mecanică, răspuns dinamic, vibrații
mecanice
Keywords: mechanical impedance, dynamic response, mechanical
vibrations

23-67 STUDIU TEORETIC ASUPRA APLICABILITĂȚII IMPEDANȚEI MECANICE

23-68 STUDIUL EXPERIMENTAL AL ACŢIUNII VIBRAŢIILOR MAŞINILOR-UNELTE PORTABILE ASUPRA SISTEMULUI UMAN MÂNĂ-BRAŢ

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Anamaria BIRIŞ Claudiu Alin GLIGOR Mariana ARGHIR la de

EXPERIMENTAL STUDY OF THE VIBRATION ACTION
OF PORTABLE MACHINE TOOL ON
THE HUMAN HAND-ARM SYSTEM
This paper is an experimental study about the importance o vibration
action acting on the human operator. For this study were made a series of
measurements on different parts of the hand-arm system of a human operator.
Were measured the vibrations generated by a hammer drill operating both idle
or full load.
Conclusions reguarding this measurements were then generated and
the results are presented in the paper below.
Cuvinte cheie: vibraţii mecanice, maşini-unelte portabile, mână-braţ
Keywords: mechanical vibration, machine tools, portable, hand-arm

23-68 STUDIUL EXPERIMENTAL AL ACŢIUNII VIBRAŢIILOR MAŞINILOR-UNELTE PORTABILE ASUPRA SISTEMULUI UMAN MÂNĂ-BRAŢ

23-69 METODE DE DETERMINARE A CONSTANTELOR ELASTICE DE MATERIAL

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Daniel Gheorghe LAKATOS Mircea BEJAN la de

METHODS FOR DETERMINING THE ELASTIC
CONSTANTS OF THE MATERIAL
The behaviour of materials under the action of the loads can be
characterized by using some physical constants, called mechanical
characteristics and material elastic.
The present research represents a synthesis of analytical and
experimental methods to determine those characteristics of material.
Cuvinte cheie: tracțiune, constantă elastică, tensiune
Keywords: traction, elastic constant, stress

23-69 METODE DE DETERMINARE A CONSTANTELOR ELASTICE DE MATERIAL

23-70 MODULUL DE ELASTICITATE A OŢELULUI DIN STRUCTURILE METALICE INDUSTRIALE EXISTENTE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Adela Diana BERDIE Gelu OPRIŞA la de

THE COEFFICENT OF STEEL ELASTICITY OF THE
EXISTING INDUSTRIAL STEEL STRUCTURES
Existing industrial steel structures, and especially those we use in the
steel industry, for whom the normal operation age is approaching completion,
are affected by the phenomena of hardening and aging of steel. Depending on
the size tension (unit stress) and the period of running, this paper is intended to
adopt a different coefficient of longitudinal elasticity corresponding to
components of the resistance structure.
Cuvinte cheie: ecruisaj, îmbătrânire, modul de elasticitate,
tensiuni, valoare
Keywords: ecruisaj, aging, elasticity module, tension, value

23-70 MODULUL DE ELASTICITATE A OŢELULUI DIN STRUCTURILE METALICE INDUSTRIALE EXISTENTE

23-71 FACTORUL DE INTENSITATE AL TENSIUNII PENTRU O CONDUCTĂ DE ABUR SUPUSĂ LA ŞOC TERMIC

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Pavel TRIPA la de

STRESS INTENSITY FACTOR OF A STEAM PIPE
SUBJECTED UNDER A THERMAL SHOCK
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 a load on the pipe. The thermal shocks are dangerous for the strength
elements.
Cuvinte cheie: conductă de abur, tenacitate la rupere, şoc termic
Keywords: steam pipe, stress intensity factor, thermal shock

23-71 FACTORUL DE INTENSITATE AL TENSIUNII PENTRU

23-72 METODĂ DE CONTROL NEDISTRUCTIV AL VASELOR DE PRESIUNE RIDICATĂ

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan SZÁVA Pál Botond GÁLFI la de

NDT METHOD FOR HIGH-PRESSURE VESSELS
The high-pressure vessels are widely used in technique. Their safeoperating
without damage represents a major demand. Taking for example the
Oxygen-, Nitrogen-, or natural gas vessels, one of their main cause/motive of
damage consists of the punt-corrosion (bottom-corrosion), which leads to the
drastically reduction (shortening) of their life-time, respectively it will
compromise their working in safety conditions. The widely-used periodical
testing methods, mainly in advance of their refilling with the working agent, are
nor sure, nor efficiently. The authors propose a simply new NDT testing
protocol, based on the Moiré-Fringe Method, but it can be applied successfully
using the Digital Correlation one. There are also described two original testing
benches. The proposed methodology will assure a high-efficiently monitoring
and good traceability of the tested vessels, respectively such controlling
method, which will not diminish their initial life-times.
Cuvinte cheie: control nedistructiv, vase de presiune, metoda franjelor
moiré
Keywords: NDT, high-pressure vessel, moiré-fringe method

23-72 METODĂ DE CONTROL NEDISTRUCTIV AL

23-73 STUDIUL NUMERIC AL CONCENTRATORULUI DE TENSIUNE PENTRU O BARĂ CU CRESTĂTURI ÎN „V” SUPUSĂ SOLICITĂRII DE ÎNTINDERE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Dănuţ FLOREA Dorian NEDELCU Raoul AVASILOAIE la de

A NUMERICAL STUDY OF THE LOCAL STRESS FOR A
RECTANGULAR BAR WITH OPPOSITE EDGE V-NOTCHES
LOADED WITH TENSILE FORCE
The application present a numerical study of the local stress for a
rectangular bar with opposite edge V-notches loaded with tensile force and
comparative results of the SolidWorks Simulation and experimental data, for
various geometrical modifications.
Cuvinte cheie: simulare, SolidWorks, bară, concentrator
Keywords: simulation, SolidWorks, bar, stress concentrator

23-73 STUDIUL NUMERIC AL CONCENTRATORULUI DE TENSIUNE PENTRU O BARĂ CU CRESTĂTURI ÎN „V” SUPUSĂ SOLICITĂRII DE ÎNTINDERE

23-74 CONSIDERAŢII PRIVIND OPORTUNITATEA UTILIZĂRII MODELULUI SHEAR PENTRU BARE DE DIFERITE LUNGIMI

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Carla PROTOCSIL Gilbert Rainer GILLICH la de

CONSIDERATIONS THE USE OF SHEAR MODEL FOR
BEAMS OF DIFFERENT LENGTHS
This paper presents a study of dynamic behaviour for different lenghts of
beams, preserving constat section. The natural frequencies on beams, for 8
bending vibration modes after weak axis were determinated using Sh model
and by FEM analysis. For any lenght of beam, the result is pretty good,
acceptable errors.
Cuvinte cheie: vibraţii, modul formei de vibraţie, frecvenţe, metoda Shear
Keywords: vibrations, mode shape, frequencies, the Shear method

23-74 CONSIDERAŢII PRIVIND OPORTUNITATEA

23-75 CONSIDERAŢII PRIVIND OPORTUNITATEA UTILIZĂRII MODELULUI EULER-BERNOULLI PENTRU BARE DE DIFERITE LUNGIMI

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Carla PROTOCSIL Gilbert Rainer GILLICH la de

CONSIDERATIONS THE USE OF EULER-BERNOULLI
MODEL FOR BEAMS OF DIFFERENT LENGTHS
This paper presents a study of dynamic behaviour for different lengths of
beams, preserving constant section. The natural frequencies on beams, for 8
bending vibration modes after weak axis were determinates using EB model
and by FEM analysis. The comparative study showed that for long lengths, the
model is sufficiently precise, while the lengths of the beams the errors are
significant. The comparative study showed that for long beams the model is
very precise, while the shorter lengths the errors are significant.
Cuvinte cheie: vibraţii, modul formei de vibraţie, frecvenţe, metoda
Euler-Bernoulli
Keywords: vibrations, mode shape, frequencies, the Euler-Bernoulli
method

23-75 CONSIDERAŢII PRIVIND OPORTUNITATEA UTILIZĂRII MODELULUI EULER-BERNOULLI PENTRU

23-76 CONSIDERAŢII PRIVIND EFECTELE COROZIUNII ASUPRA COMPORTAMENTULUI DINAMIC AL GRINZILOR

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Daniel BOBOŞ Gilbert Rainer GILLICH Zeno-Iosif PRAISACH la de

CONSIDERATIONS REGARDING CORROSION EFFECTS
ON BEAMS DYNAMIC BEHAVIOR
Negative effects caused by corrosion are significant, both economically
and in terms of public safety, so incipient detection of corroded areas is
necessary to take in real-time measures to prevent the occurrence of
dangerous situations. This paper presents types of corrosion and various actual
methods used to detect corroded areas together with a new approach in
damage detection based on vibration measurements. While the proposed
method base on frequency changes, to understand the dynamic behaviour of
beams subjected to corrosion is a first step. It permits establishing appropriate
mathematical models and development of damage detection methods implying
the monitoring and analyzes of beams natural frequencies.
Cuvinte cheie: coroziune, detectarea defectelor, frecvenţe proprii
Keywords: corrosion, damage detection, natural frequency

23-76 CONSIDERAŢII PRIVIND EFECTELE COROZIUNII

23-77 CONSIDERAȚII PRIVIND SOLICITAREA DINAMICĂ PRIN ȘOC A MATERIALULUI UZUAL UTILIZAT PENTRU PARAPETELE DE PROTECȚIE LA DRUMURI

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Maria – Adriana CORDOȘ Mircea BEJAN Vasile RUS la de

CONSIDERATIONS ON DYNAMIC LOADING BY SHOCK OF
MATERIAL USUAL USED ON ROAD RESTRAINT SYSTEMS
This paper presents a presentation between the results of experiments
conducted by dynamic loading by shock of the material which is made the road
restraint systems, S235JR black and galvanized. For an appropriate safe level,
protection systems must absorb as much energy as possible during impact,
maintaining their integrity. Road restraint systems protect the road vehicles
from dangers, which are forwarded to the roadway minimizing serious injury.
Restraint deformed metal systems components are made of S235JR, S275JR
or other equivalent. After road restraint systems components execution, they
are promoted to the technological flow hot dip galvanizing, which are protected
against corrosion.
Cuvinte cheie: încărcare dinamică, șoc, S235JR, sisteme de reținere
rutiere
Keywords: dynamic loading, shock, S235JR, road restraint systems

23-77 CONSIDERAȚII PRIVIND SOLICITAREA DINAMICĂ PRIN ȘOC A MATERIALULUI UZUAL UTILIZAT

23-78 PROIECTAREA ȘI REALIZAREA PARAPETELOR DE PROTECȚIE LA DRUMURI UTILIZÂND INSTRUMENTE CAD/CAE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Maria – Adriana CORDOȘ Mircea BEJAN la de

DESIGN AND IMPLEMENTATION OF ROAD RESTRAINT
SYSTEMS USING CAD/CAE INSTRUMENTS
The objective of this paper is to provide theoretical foundations for a
modern approach to design and execution of Road Restraint Systems using
CAD / CAE technology. The global stiffness of the road restraint system is
largely attributed to the design of the distance spacer in the initial phase of an
impact. How to make virtual modelling is based on using Solid Works software,
finite element analysis software using Hyper Mesh RADIOSS extension and
rapid prototyping for fast implementation of Road Restraint Systems
components. The paper present a new damper used to absorb the energy
produced during impact.
Cuvinte cheie: sistemele de reținere rutiere, CAD/CAE, amortizor
Keywords: road restraint systems, CAD/CAE, damper

23-78 PROIECTAREA ȘI REALIZAREA PARAPETELOR

23-79 SOLUȚII CONSTRUCTIVE PRIVIND REALIZAREA PARAPETELOR DE PROTECȚIE CE ECHIPEAZĂ CĂILE RUTIERE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Constantin Vasile BÎTEA Cornel IACOB-MARE Eugen-Marius AFRONIE la de

CONSTRUCTIVE SOLUTIONS REGARDING THE
IMPLEMENTATION OF THE PROTECTIVE
RAILINGS FITTED ROADS
By definition, the railing is a wall or a railing of little height which
serves to delimit the edge of a road, a bridge, aimed at stopping vehicles and
restoration mainly on the carriageway, pedestrians and conveyance of other
road users.
Cuvinte cheie: carcase, rezistență, oţel, deformare, parapet de protecţie
Keywords: enclosures, endurance, steel, deformation, protection guardrail

23-79 SOLUȚII CONSTRUCTIVE PRIVIND REALIZAREA PARAPETELOR DE PROTECȚIE CE ECHIPEAZĂ

23-80 STUDIUL MODELELOR 2D CU AJUTORUL METODEI ELEMENTELOR FINITE

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Nicuşor Laurenţiu ZAHARIA Tiberiu Ștefan MĂNESCU la de

2D MODELS STUDY USING FINITE ELEMENT METHOD
2D models can be used for probe modelling in purpose to perform finite
element analysis in a small time. The 2D model can be the result from a 3D
model.
Cuvinte cheie: epruvete, model 2D, model 3D, elemente finite
Keywords: 2D, pattern pieces, 3D model, finite elements

23-80 STUDIUL MODELELOR 2D CU AJUTORUL

23-81 METODE DE PROIECTARE A ARCURILOR DE COMPRESIUNE ELICOIDALE UTILIZATE LA ECHIPAMENTE SPECIALE, CU AJUTORUL MEF DIN UTILITARUL Cosmos Xpress

Această intrare a fost publicată în 2013 Volumul 23 și etichetată Ioan NECŞA la de

METHODS OF DESIGN HELICAL COMPRESSION SPRINGS
USED IN SPECIAL EQUIPMENT, USING MEF
UTILITY Cosmos Xpress
This paper presents the pattern of modern elastic elements design for
middle arms. This model is a handy tool optimizing military specialist’s
constructive characteristics of the box elements.
Cuvinte cheie: balistică internă, elemente finite, spirală arhimedică,
discretizare, variabile de proiectare, functie obiectiv
Keywords: internal ballistics, finite elements, arhimedica, meshing,
spiral variables design, based on objective

23-81 METODE DE PROIECTARE A ARCURILOR DE COMPRESIUNE ELICOIDALE UTILIZATE LA ECHIPAMENTE SPECIALE, CU AJUTORUL