| A s a kind of important transportation, car has made a prominent position in the field of transportation and the daily lives of the people, and its safety, driving comfort, handling stability are demanded increasingly higher by user. The automotive suspension system, which affects the dynamic characteristics of automotives, is the most critical subsystem. While the wheel orientation parameters decided by the suspension has a direct impact on the ride-comfort of automotives. Moreover, multi-body dynamics system has an important position in automotive suspension system and dynamics system.During the modeling of McPherson Suspension, three-dimensional software UG for solid modeling was used, precise geometric positioning parameters and quality parameters were obtained, and based on the test characteristic parameters, modeling of non-linear characteristics of shock absorber was successfully implemented in ADAMS, which made the model simulation closer to real automotive McPherson suspension condition. Added with the road surface excitation, the change rule of automotive suspension parameter under working was analyzed, and then to optimize the structure of model with ADAMS/Insight.Under the basis above, using ADAMS software to set up dynamics model of whole automotive, including front and rear suspension, steering, body tires and other systems. The establishment of a virtual road surface model, commonly used to realistic simulation of A-class road, and ride comfort of their vehicle to the road surface in the simulation analysis.Conducted the road test of ride-comfort and compared with simulation results, the correctness of model were verified. By changing the front suspension, tire, and related-parameters, a lot of dynamics simulation calculation were conducted, from which we can qualitatively know these parameters how to affect the law of vehicles ride-comfort, and how to improve the sample-vehicles' ride-comfort.
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