Abstract: In this paper , 4-degree-of-freedom's vehicle model is developed, with the comideration of the influences of vehicle roll on dynamic loads caused by pavement roughness . By using this model , the vehicle dynamic loixle under different vehicle speeds and wave-lengths but the saw wave-highs pavement roughness.

Key words: vehicle model, 4-egree-of-freedom, vehicle vibmtion, dynamic load;sudace evenneas , roll

摘要： 考虑汽车侧倾因素在路面不平引起汽车动荷问题中的影响,建立了4自由度车辆模型,并据此模型实例分析计算了在路面波幅一定的情况下,汽车在不同波长路面上以不同车速行驶时产生的车辆动荷载.

关键词: 汽车模型, 四自由度, 车辆振动, 动荷载, 路面平整度, 侧倾