Insights into Underrail Rubber Pad’s Effect on Vehicle-Track-Viaduct System Dynamics

To scientifically characterize the dynamic mechanical characteristics of rubber pad under rail fasteners and its influence on response vehicle-rail-viaduct system, taking WJ-7B high-speed railway (HSR) with constant resistance as an example, a TFDV model was applied to viscoelasticity theoretical in coupling vehicle-rail-bridge also studied. The results show that energy storage modulus loss factor curved surface relation versus change frequency-temperature. In certain frequency/temperature range, increase decrease temperature frequency, low parameters is more significant. With temperature, minimum value total flexibility decreases, corresponding extreme frequency shifts high frequency. Viscoelastic features mainly affect vehicle subsystem rail-bridge subsystem. ambient pad, dominant band power spectrum curve each structure