Axle coupling vibration analysis method

The invention discloses an axle coupling vibration analysis method. The method comprises the following steps: S1, constructing a passing vehicle driving model; s2, constructing a deformation coordination model between the passing vehicle and the bridge, and determining the interaction force between the passing vehicle and the bridge; s3, constructing an axle coupling motion model; s4, an axle coupling motion model based on a mass damper is constructed, dynamic responses of the vehicle and the bridge are obtained, and axle coupling vibration analysis is completed. The dynamic response of the vehicle-bridge-mass damper coupling system constructed on the basis of the axle and the mass damper is smaller than that of a vehicle-bridge coupling system without a damping device, and the axle coupling vibration analysis method has an obvious suppression effect on axle coupling vibration of a large-span long-connected continuous beam bridge; the vertical vibration acceleration and the vertical displacement of a running