Finite Element Analysis of Car's Sub-Frame

This paper studied the sub-frame of car. To optimize the design of the sub-frame of car, the finite element analysis was applied to the sub-frame.Through the static analysis, it found that the yield maximum stress is greater than the vice stress of frame material. The result showed that the static strength of sub-frame met the requirements.The rationality of the design of the side frame was verified. The twelve order modal parameters of sub-frame were analyzed.