车辆荷载激振下多跨连续梁桥的减振研究

The Vibration Reduction Research of Multi-span Beam Bridge Under Moving Vehicular Loads

以行车作用下安装弹簧-质量体系的连续梁桥为研究对象,对桥梁进行减振研究。将车辆简化为两自由度体系系统,将弹簧-质量体系与连续梁桥考虑为一个整体,建立车辆与带弹簧-质量体系连续梁桥的耦合力学模型。通过数值算例表明:安装弹簧-质量体系减振装置可以降低连续梁的振动响应,当弹簧-质量体系的频率接近桥梁的第一阶自振频率时,减振效果较好。

The paper studies the vibration reduction of coupled vehicle-bridge system with spring-mass under moving vehicular loads. The vehicle is simplified as two degree of freedom system. The bridge and spring-mass are considered as a whole. The coupling mechanical model is established to simulate the vehicle and the spring- mass system of continuous beam bridge. The numerical examples show： the damping device of spring-mass system can reduce the vibration response of continuous beam bridge; when the frequency of the spring-mass system is close to the bridge of the first-order natural frequency, the vibration reduction effect is good.The nearly first frequency of bridge, the better reducing vibration effects.