On the Shock Caused by the Collision of Railway Vehicles
"Aurel Vlaicu" University
No. 77 Revolutiei Bld.
The shock caused by the collision of railway vehicles
determines the transmission of forces and accelerations
to the vehicles, with unwanted consequences. In order to
diminish the effects of the shock, railway vehicles are
equipped with shock insulators. A personal theoretical
approach is presented, completed by a series of
experimental studies on the efficiency of the elastic
elements of buffers and long displacement dampeners, in
regards to the diminishing of the response amplitude of
the mechanical system formed by the vehicles that take
part in the collision.
The energy characteristics of the shock caused by
collision of railway vehicles are described, a personal
computation method of the force transmitted during
collision, original force transducer solutions used in
order to determine the force transmitted during
The time evolutions of the kinematic and dynamic
parameters (displacement, velocity, acceleration) of the
vehicles during the shock are presented and the unwanted
consequences of the shock caused by collision are
discussed in regards to the resistance of the bearing
structures, the equipment and the integrity of the
Brief Biography of the Speaker:
Ion Copaci graduated from the "Traian Vuia" Polytechnic
Institute in Timisoara, Romania, Faculty of Mechanics.
He received his Ph.D. in the field of Mechanical
Engineering with the thesis „Contributions on the
Behaviour of the Bearing Structures of Railway Cars
During the Longitudinal Shock Caused by Collision",
presented at the "Politehnica" University Timisoara,
Faculty of Mechanics, Department of Rolling Stock.
Technical Experience: research in the area of vibrations
and shocks on railway vehicles (rolling quality,
repeated shock), bearing structure resistance (lifetime,
fatigue), elastic elements that equip the suspension or
shock insulators of railway vehicles, torsional rigidity
and travel safety, quantitative determinations (MATHAR)
of the internal stresses on the bearing structures of
bogies and Francis turbine rotors. Contributions and
experimental research for the promotion on the railway
of over 150 freight and passenger railway car
prototypes, in almost 30 countries on 5 continents, as a
result of over 30 years of research.
Nowadays he is a Professor at the Faculty of Engineering
of "Aurel Vlaicu" University, Arad, Romania.
Field of specialization: Railway Transport Vehicles,
with disciplines taught: "Dynamics of Railway Vehicles"
and "Experimental Research on Railway Vehicles".
He has published over 120 research papers, 7 books and 4
He is a member of 6 societies and professional
associations and he is a member of the Ukrainian Academy