Research of Frame Optimization Technology Based on SIMP

Abstract

The low frequency vibration of vehicle is very popular. The vibration can reduce ride comfort and cause early damage of part, so we must do something to reduce it. But the vibration has more complex impact factors, so it is very difficult to solve it. This paper has studied a new method to reduce it. It has studied the natural frequencies of the frame on the platform of OptiStruct software. Through the research, we find that the first order mode natural frequency of the frame is close to the external motivation, which is caused by moving unbalance of wheels. It leads to the resonance phenomenon, which is the main reason for vehicle low frequency vibration. In order to improve the vibration, this paper has researched the principle of SIMP topology optimization technology, and searched for the topology frame structure, whose first mode natural frequency is far away from the external motivation. Finally, this paper shows a new design for the frame, which reduces the low frequency vibration of vehicle greatly.