中文摘要：

提出了在路面随机谱激励下,将多个参数变量进行分离,两两组合,并按不同基准对车-桥振动的动力放大效应进行归类分析的方法。建立了考虑路面随机激励的车-桥振动微分方程组,计算了系统中的动力放大系数并赋予其点、线、面的几何意义;定义了路面不平顺谱放大系数,并以响应类型、车速、路面不平顺等级为标准进行了计算、归类分析。结果表明：车-桥系统的动力放大效应总体上随车速及路面不平顺等级的增大而增大;在不同路面不平顺等级下,桥的动力放大系数小于车的动力放大系数;同时,路面不平顺等级显著影响车与桥的动力放大系数;工程上应重视对路面的维护,以减小对桥梁结构的冲击,降低车辆行驶的振动。

英文摘要：

A classification analysis method on dynamic amplification effect of the vehicle-bridge system was proposed under random spectral excitations of the road surface.The differential equations of vehicle-bridge system were solved on numerical method.The dynamic amplification factor in system was calculated and geometrical significances of point,line and plane of the factor were endued.The roughness dynamic amplification factor was defined,and was calculated based on the classification of the response type,vehicle velocity,road surface roughness.Results show that the dynamic amplification effect increases with the vehicle velocity and the ranks of road roughness,and the amplification factors of bridge are always little than those of vehicle under different ranks of road roughness.The factors are significantly affected by the rank of road roughness.So the road maintenance should concentrate on reduction of impact of bridge and vibration of vehicle.