Finite element modeling and analysis for the modals of vehicle’s frame

Analytical method and software technology of finite element plays a very important role in vehicle structural analysis.Taking an off-road vehicle′s frame as an example,using the HyperWorks software,sets up the finite element analysis model on SHELL element type as basic type.Introduces the finite element modeling process and discusses matters in the modeling process to which should be pay attention. The modal analysis was studied by Optistuct,and analyzes the modal of frame based on former ten the natural frequencies and modal shapes,supplies important modal parameter for the response analysis and foundation in the theory to impove design of the vehicle frame.