基于达朗贝尔原理的车桥耦合振动模型仿真

Simulation of Vehicle Bridge Coupling Vibration Model Based on D′Alembert’s Principle

针对车辆与桥梁间共振现象的影响,导致耦合位移误差较大、振动频率较大的问题,研究一种基于达朗贝尔原理的车桥耦合振动模型仿真方法。根据车桥之间的时-空分布,构建车桥振动响应关系,在车辆与桥梁始终保持接触的情况下,利用达朗贝尔原理建立车桥耦合振动模型,整合不同振动模型节点的仿真过程为一个振型函数,控制仿真过程的计算量,最终完成车桥耦合振动模型仿真。仿真结果表明,所设计仿真方法产生的耦合位移误差及振动耦合频率较小,计算量最少,适合实际仿真使用。

The resonance between vehicle and bridge results in large coupling displacement error and vibration frequency.In this regard,this paper studies a simulation method of vehicle bridge coupling vibration model based on D′Alembert’s principle.Based on the time-space distribution between vehicle and bridge,the response relationship of vehicle and bridge vibration was established.On the premise that the vehicle always kept in contact with the bridge,D′Alembert’s principle was used to establish the vehicle bridge coupling vibration model.A new vibration model function was generated by the integration of different vibration model nodes.The amount of calculation in the simulation process was controlled to complete the simulation of the vehicle bridge coupled vibration model.The simulation results show that the simulation method has minor coupling displacement error and vibration coupling frequency,less calculation,and is suitable for practical simulation.