In order to study the vibration effect of rubber mortar under cement asphalt mortar, the vertical dynamic model of vehicle-track-bridge coupling is established based on dynamic compliance method. The vehicle considers 1/8 rounds of the system, and only considers primary suspension. And the rails are regarded as infinitely long Timoshenko beams, the bridge is simplified as simply supported Euler beam, fastener system, Cement asphalt mortar, rubber pad with linear spring damping unit simulation, combined wheel dynamic compliance, rail dynamic flexibility and linear contact soft calculate the frequency of the track and field force and apply to the rail, calculate the rail, track plate, bridge dynamic response. The vibration response of the rubber pad was evaluated by the vibration acceleration level, the acceleration level insertion loss and the Z-level insertion loss. The results showed that the vibration response of the steel belt was slightly increased after the rubber pad was used, the insertion loss of the Z-stage was -0.81 dB, the vibration response of the bridge is reduced to -10.3 dB, the vibration response of the bridge is reduced obviously, and the insertion loss of the Z stage is 15.6 dB. The calculation results show that the rubber pad can effectively reduce the vibration of the bridge structure. The relevant research provides a reference for vibration reduction and noise reduction of bridges.
