中文摘要：

对于移动力作用下简支梁的振动,推导了考虑阻尼和自由振动影响的动力学方程用以研究简支梁桥在车辆荷载作用下的动态挠度响应,并通过动力学有限元方法验证了该理论解的可靠性.利用该理论解探讨了影响车辆荷载冲击系数的主要因素,包括车辆的速度、桥梁的自振频率、结构材料类型和阻尼等,所得结论可为桥梁结构的减振降噪提供参考.

英文摘要：

The dynamic equation goveming the vibration of the simple-supported beam under moving load is presented for the analysis of the transient deflection of bridge under vehicle load, in which the damp effect and free vibration are considered. The theoretical solution is validated by the dynamic finite element method. Using the proposed method, the parameters affecting the impact factor of vehicle load is discussed, such as the velocity of the vehicle, length of the bridge, construction material and damping. The results are informative in reducing the vibration and noise of bridge structure.