Research On Dynamic Response Of Vehicle Flow Coupled With Continuous Rigid Frame Bridge

In bridge engineering,the coupling vibration of bridge and vehicle is a hot research trend.In the past,the research on the coupling of multi vehicle and bridge often used some combinations of moving loads to approximate the moving vehicles,which failed to fully consider the dynamic characteristics of the moving vehicles,so it has great limitations.Based on the engineering background of dakenghe bridge,this paper establishes the finite element model of the three-axle heavy-duty truck,which simulates the real vehicle characteristics such as the mass of the car body,the rotation of the tire,the tire pressure,the suspension stiffness of the car body as much as possible,and can better study the dynamic response of the bridge under the vehicle load.The main work of this paper is as follows:(1)This paper introduces the research status of vehicle bridge coupling,including the calculation method and basic theory,the principle of explicit and implicit solution of LS-DYNA software and the contact algorithm to realize coupling.(2)A three-axle heavy-duty truck model and a continuous rigid-frame bridge model were established with actual engineering as the background,and the correctness of the models was verified.(3)The coupling analysis of the continuous rigid frame bridge and the vehicle was carried out,and the dynamic response of the bridge like deformation and force,under various vehicle conditions were obtained.