Based On Analysis Of Multi-body Dynamics Model Of Vehicle Ride Comfort

SUV is the sport utility vehicle. Because it not only has some functions of off-road vehicle but also partly satisfies the home recreation requirement, the SUV type is favourably received in the market. The handling stability and ride comfort are critical factors affecting the driving safety of vehicles. In the manufacture of high-speed vehicles, the vehicle handling and ride are more important and are becoming the main criterion in vehicle performance evaluation. With the rapid development of the computer technique, the virtual prototype technique based on the multi-body dynamics is widely applied in the design region of vehicle handling and ride comfort.Taking into the theory and method of multi-body system dynamics, the multi-body system models of a SUV type front suspension and full vehicle are parameterized with ADAMS software in this dissertation. The sensitivity analysis, the optimization design of front suspension performance as well as the full vehicle dynamic performance are finished. The preliminary ride comfort analysis of the full vehicle is studied. This study gives an efficient method which has the theoretical guidance value for the SUV type research and development.By the multi-body system models of SUV type front suspension and full vehicle, the sensitivity analysis for the main performance parameters of the front suspension and the full vehicle handling and stability is conducted. It is discussed for the design variables to affect the front suspension performance parameters and the full vehicle handling and stability. The important factors are discovered. At last, the dynamic optimization design of the full vehicle handling and stability is finished. The valuable guidance is supplied for the design and R&D of the SUV type.The multi-body system ride comfort model of a SUV full vehicle is founded, considered the influence of rubber sleeve on the ride of the SUV type full vehicle. The auto-operation program of the road document is finished with the VB software. The program to appraise the ride of the full vehicle is completed by the MATLAB software and the preliminary ride analysis is studied. The mathematic model of this SUV full vehicle is fulfilled and the ride analysis is accomplished with SIMULINK. The consistency is achieved between the result from ADAMS and the result from SIMULINK.Through the simulating calculation and the analysis, the built multi-body models of the SUV front suspension and the full vehicle are accorded with the real vehicle type on the main performance and on the variation trend. The models and the results are confirmed by the manufacturing corporation of the SUV type.