车-桥耦合系统的动力特性分析

The Dynamic Analysis of Bridge under Moving Vehicles

利用振型叠加法以及时变力学系统的求解方法,以简支梁桥为对象,开展了车-桥耦合系统的振动特性分析。通过数值计算,比较了移动力、移动质量、移动振动系统三类模型的计算结果,讨论了跨径和移动速度变化时对挠度冲击系数和弯矩冲击系数的影响。并根据Piotr给出的结果对本方法进行了验证。

In this paper, the dynamic characteristics of the bridge-vehicle interaction is studied. Vehicle loads are represented as moving forces, moving masses, or moving multi-degree-of-freedom bodies. The various stiffness and damping characteristics of vehicles are taken into account in the multi-(degree)-of-(freedom) models. Numerical results are presented for calculating the effects of the moving velocity and the span on the impact coefficient of bridge.