Rail Vehicle Cab Structural Dynamic Behavior under Collision and Improving its Crush Worthiness
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Date
2014-07
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Addis Ababa University
Abstract
is now constructing a modern and reliable railway industry, consequently; one main
problem of the Rail vehicle transportation industry is its accidents. This paper will attempt to
develop a passive safety consideration for rail vehicle cab using computational methods for
predicting the rail vehicle cab structural dynamic behavior under collision for enhancement in its
crush worthiness.
The rail vehicle cab structural dynamic behavior under collision analysis is done for light rail
transit (LRT) vehicle cab, through finite element method (FEM) and it is one of the non-linear
finite element problems as the vehicle cab structure is the assembly of multiple parts, diverse
structural shape and is made of different materials.
During crush, these parts experience high impact loads resulting in high stresses. Once these
stresses exceed the material yield load and/or the buckling critical limit, the crashing structural
components undergo large progressive elastic-plastic deformation and/or buckling. This system
absorbs 4.5MJ kinetic energy in a progressive of 2.25m deformation length. The whole process
occurs within very short time durations and this is simulated by non-linear FEM using ANSYS
(LS-DYNA).
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Keywords
Crush Worthiness, Crush Worthiness, Collision, Dynamic Behavior