Hook Position Optimization of Automobile Exhaust System
Under the excitation of the engine and the road surface,the vibration and noise of the exhaust system are transmitted to the body,which will produce the vibration noise of the whole vehicle.This will seriously affect the NVH(Vibration,Noise,Harsh-ness)performance of the vehicle.The position of the hook is optimized by ADDOFD(average driving degree of freedom displace-ment method).Firstly,the finite element model of the exhaust system is established according to the existing exhaust system,and the modal analysis of the exhaust system is carried out respectively by simulation and experiment,and the finite element model is verified by experimental mode.Finally,based on the finite element model of the effective exhaust system,the position of the hook is optimized by the ADDOFD method.The results show that the vibration of the vehicle is obviously improved after optimizing the hook position,which proves that the original hook position is not the optimal position.This method can effectively select the better position of NVH performance suspension in early vehicle development.
Exhaust SystemModal AnalysisMean Driven Degree of Freedom MethodHook Position Optimization
NETL
NSTL
万方数据
维普
