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中文摘要：
为了求解车桥系统振动方程中随时间变化的刚度矩阵、质量矩阵和阻尼矩阵，采用将列车一桥梁作为一个整体系统，用能量法导出了车桥系统的刚度矩阵、质量矩阵和阻尼矩阵．用此方法对某连续钢桁梁桥的振动响应进行了仿真分析，并计算了某简支钢桁梁桥的横向振动，与实测值的波形图接近，证明该方法正确可靠．
英文摘要：
To solve the matrices of stiff, mass and damping varying with time in vehicle-bridge vibration equations, the train and bridge were coupled together as one composite system. The vibration equations of vehicle-bridge time varying system were established by means of potential energy principle. The vibration responses of a continuous truss girder bridge were analyzed by using this method. The lateral vibration calculation results of a truss girder bridge are close to the testing values. This confirms the reliability of the method.
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