Simulation Analysis And Optimization Of Heavy-Duty Truck Cab Suspension System

The aim of this project was the parameter optimization of cab suspension system by means of multibody system dynamics analysis. Through the optimal design of cab suspension system structural parameters and the matching between subsystems performance parameter, improved the truck ride comfort.thereby increased the market competitive ability of the truck.The main research of this paper was:1.according to parameters of some heavy-dyty truck cab air spring suspension system, a virtue prototype model of cab suspension system was built (cab was considered as rigid body).Using real vehicle test data as simulating excitations, we calculated the response of every suspensioning point through the dynamic model. The dynamic model was verified by comparison analysis between simulation results and test results in time domain and frequency domain2.Taking into account the effect of low frequency component to cab suspension system vibration characteristics in body system, we considered the cab as flex body, and built rigid-elastic coupling virtue prototype model of cab air suspension system. Using real vehicle test digitals as simulating excitations, we calculated the response of every suspensioning point through the dynamic model. The rigid-elastic coupling dynamic model was verified by comparison analysis between simulation results and test results in time domain and frequency domain 3.Comparing the rigid virtue prototype model to the rigid-elastic coupling virtue prototype model of cab air suspension system, we got the influence of cab(considered as flex) to dynamic model accuracy, and choose one model to optimize.4. using the above verified rigid-elastic coupling dynamic model, we optimized the design of cab suspension system by means of DOE test, the influence of every configuration parameter and component characteristic variation to cab suspension system performance were reviewed. The optimal design of cab suspension system was accomplished based on the reasonable suggestion of improving the cab suspension performance.