Research on Mathematical Modelling and Analysis Mothod of Vehicle-bridge Coupled Vibration

Abstract

The existing vehicle-bridge coupled vibration analysis of the vehicle model cannot accurately consider the vehicle dynamic characteristics and the impact of flexible tires on the vehicle-bridge coupled vibration response. This paper analyzes the surface contact on the vehicle-bridge coupled vibration by establishing a new three-dimensional wheel model The contact surface between the wheel and the road surface is simulated as a rectangle, and the vehicle-bridge coupled vibration equation is established through the coordinated displacement conditions and force interaction between the contact surfaces. The vertical acceleration of bridges and car bodies is significantly affected by track irregularities. Improving line conditions can effectively improve the comfort of trains; at the same time, the higher the speed, the greater the root mean square of the random response of bridges and vehicles, which is caused by track irregularities. The greater the dispersion of the vibration response of the coupled system.