Structural dynamic analysis of freight railway wagon using finite element method

摘要

This paper describes the development of a virtual freight wagon vehicle using virtual prototyping computer tools. The freight wagon considered as open type wagon "BOXN25" of the Indian Railways. The freight wagon vehicle comprises of car body structure and two bogies. Solidworks is used for modeling the freight wagon and the geometry is exported to finite element tool, ANSYS. A multi degree of freedom system has been reviewed and compared with system having infinite degree of freedom (continuous structure). The current problem falls in the category of large models (Block Lanczos Algorithm is used) and has high degrees of freedom (PCG Solver is used). The structural dynamic response for the virtual freight wagon is determined. It is seen that the car body deformation is influenced by its elastic underframe and sidewalls. The influence of vibration modes, which describe local deflection, on the comfort level and stability of laden goods is discussed. Mode shapes up to a frequency of 30 Hz are considered.