大跨度悬索桥的车桥耦合振动分析

Analysis of vehicle-bridge interaction of long span suspension bridges

车桥耦合相互作用问题采用有限元法分析时是一个时变的线性动力系统。文章将时变的线性动力系统分解成时变的线性动力系统和时不变的线性动力系统的叠加,利用状态空间理论建立了车桥耦合振动有限元法分析的状态空间法,并对悬索桥在移动车辆作用下的车桥耦合振动问题进行了研究。

Based on finite element method, the vehide-bridge interaction（VBI）（the couphng interaction between the vehicles and bridges） can be transformed to a linear time-variant system. The system is deeomposed of a linear time-variant system and a linear time-invariant system. Using the modal matrix of linear time-invariant system and state space method, the state space equation of the vehicle-bridge coupling system is obtained. The VBI problem of a suspension bridge subjected to a moving vehicle is analyzed by using the presented methocd