中文摘要：

针对公路桥梁车桥耦合振动响应分析的复杂性,结合分离迭代法原理与车辆动力学理论,提出了基于ANSYS的车桥耦合振动响应数值分析方法.将车辆模型与桥梁模型分别独立建于ANSYS软件环境中,利用约束方程实现任意时刻车轮与桥面接触点的位移协调关系（力的平衡关系自动满足）,基于ANSYS瞬态动力学求解功能,采用APDL编程实现车辆（车流）过桥的耦合动力时程响应分析,并与相关文献算例结果进行了定量比较.研究结果表明：该方法精度较高,与文献结果对比,光滑路面下响应相对误差均在5％以内,考虑桥面平整度时响应趋势基本一致;该方法在任意载荷步处不需要迭代计算,避免了复杂程序设计,极大地提高了分析效率.

英文摘要：

The analysis of vehicle - bridge coupling vibration for highway bridges is complicated. A numerical method of analyzing vehicle - bridge coupling vibration is presented based on ANSYS software combining prin ciple of separation iteration method and theory of vehicle dynamics. The vehicle and bridge models are built separately by using ANSYS, and the displacement coordination relation between the wheel and the bridge sur face is fulfilled with the help of constrain equation at any time, meanwhile the balance of interaction between vehicle and bridge is automatically satisfied. When single vehicle or several vehicles drived through bridges, coupled dynamic time - history response of bridges is analyzed by APDL programming based on transient dy namics function of ANSYS, and the computed results are quantitatively compared with those in references. The results show that this method is reliable. Compared with the results in the references, the relative error of dy namic response of bridges is less 5% on smooth deck, while the varying trend of dynamic response of bridges is similar on roughness deck. Iterative computation is not needed in this method at any load step, so complicated program design is avoided and analysis efficiency is greatly improved.