# Tiberiu Dimitrie BABEU

## 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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## 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
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

## 23-11 ACADEMICIANUL ȘTEFAN NĂDĂȘAN – DIN VIAȚA ȘI ACTIVITATEA SA

OF HIS LIFE AND HIS WORK
Stephen Nădășan (born 19 august 1901 in Timisoara on September
23, 1967 in Timisoara) was a Romanian engineer. Is the founder of the
Romanian School of testing materials. Contributed to the improvement of cast
irons and brought important innovations in welding of metals. Titular member of
the Romanian Academy. It shows aspects of his life and his work,
supplemented with chronological data.
Cuvinte cheie: Ștefan Nădășan, academician și inginer român,
fondatorul școlii românești de încercarea materialelor
Keywords: Ștefan Nădășan, academician and engineer, founder of the
Romanian School of trial materials

## 21-89 RELEVANŢA PROCESULUI DE ECRUISARE APLICAT ARCURILOR ELICOIDALE CILINDRICE ALE VEHICULELOR FEROVIARE

RELEVANT PROCESS APPLIED HARDENING COIL
SPRINGS CYLINDRICAL RAILWAY VEHICLES
In the performance of helical springs, the surface residual stresses are
introduced: the outside bar tensile stress and compressive stress inside the
bar. They associated with a possible primer for cracks can lead to premature
rupture of the spring in use. To eliminate this drawback springs are subjected to
hardening treatment which is performed, usually with steel shot.
This paper aims highlighting the importance of the hardening process
applied coil springs to increase resistance to fatigue and lifetime.
Cuvinte cheie : ecruisare, arcuri, epruveta ALMEN, bile de otel (alice)
Keywords: hardening, springs, Almen specimen, steel balls (shot)

89 RELEVANŢA PROCESULUI DE ECRUISARE APLICAT