基于人体动力模型和7自由度全车模型，路面采用Kelvin地基上Euler梁进行模拟，通过车轮与路面接触处的位移协调方程和车路相互作用力的平衡关系建立人－车－路耦合振动方程，采用New-mark积分法对方程组进行求解。对小型汽车在路面上行走过程进行了仿真分析，采用乘坐舒适度指标对人体振动舒适性进行评价，为从乘坐舒适度角度来评价路面不平顺提供了理论依据，并对路面级别、车速、乘坐者数量以及车辆各参数对系统振动的影响进行了初步讨论。

The human body is simplified as the parallel dynamic model and the vehicle as the seven-freedom vibrating model. The road is supposed as the Euler Beam on the Kelvin base. And then base on the compatibility deformation condition and the interaction force between the road and the vehicle, the dynamic functions of the body-vehicle-road coupled system are derived. The functions are been divided and solved with mode synthesis method and New-mark method. The process while the vehicle is running on the road is simulating, and the riding comfortable is analyzed with the synthetic comfortableness. It proffers the thereunder that the comfortableness can evaluate road roughness. And also the effects of the vehicle parameters, vehicles velocity, road surface class and the amount of passenger on the vibration of the system are also analyzed.