Dynamic Analysis Method of Vehicle-Bridge Coupling for Complicated Bridges Based on ANSYS

A computational method for numerical analysis of vehicle-bridge coupled vibration for complicated bridges with the existing common finite element analysis software ANSYS has been put forwand.The vehicle and bridge are considered as two separate subsystems in the method,and the generalized virtual work principle and finite element method are applied,respectively,to derivation of the vibration equation sets for vehicle and bridge.By coupling of vehicle vibration and bridge vibration with compatibility equations of displacement and contact equations of vehiclebridge interaction,equations of vehicle-bridge coupled vibration are established and the implemented with ANSYS.Numerical analysis shows that,with iterations for only three times,the results with higher accuracy and reliability are achieved,which are in good agreement with impact factor calculated with the fundamental frequency of continuous beam bridges given by code.The method proposed provides a convenient and reliable numerical analysis approach to dynamic performance evaluation of complicated bridges such as curved continuous beam bridges.