Light Truck Body Vibration Problems With The System Resolution

In condition of good roads and empty loads,at the speed of 55-60km/h,the cab of BJ1043V8PE6 Light Truck, developed by Futian Corporation, produced vibration distinctly. It caused complains and dissatisfied due to the sensitivity that the vibration happened during the common vehicle velocities. The consumers required compensation and withdrawing the truck.All of this brings about bad effects over the production and sale. To solve it, a deep, systemic and overall research program organized by me has been developed.Making the whole truck the research object and building up all the FEM model including body and chassis. After finite element mode analysis of body and chassis by NASTRAN, the systems dynamic character is realized. It is the academic basis of modifying the strcuctures. Dynamic Response analysis is a direct an effective method in vibration research. It helps research between many schemes and choose the best one. In order to solve the vibration totally, fine examination and testing is done. Modification was made with the failure truck and test of varied schemes was done. It proved that the simulation results is correct. Through comparing simulation analysis with experiments, the thesis systemically investigates the reasons of vibration and obtains the scheme to solve this type of problem.According to the analysis and experiments, the thesis brings forward the improved method of the system and carries into execution. It solved the problem effectively and in good time. In the thesis, the research method of integrating dynamic simulation analysis and finite element analysis with experiment is advanced, which is utilized in production development and fault diagnose and disposal. It creates great economic benefit for Futian Corporation and plays a key role in shortening the research period and reducing the cost. The research results have the universally instructions and references for solving the body's vibration.