Modelling and Experimental Validation of the Dynamic Damping Characteristics of A High-speed Train Hydraulic Damper

Abstract

Abstract Aiming to understand the effects of damper parameter on vehicle system dynamics in the context of railway vehicle system design, a full parametric damper model, which includes the complete valve system dynamics, the dynamic force equilibrium equation, the flow continuity equation, the flow losses model and the comprehensive stiffness model, is established in this work. Both numerical simulation using the established damper model and bench test of dynamic performance of the damper are carried out, the comparison shows that the maximum relative error between simulation and bench test is only 2.6%, in addition, the rates of asymmetry are near and both small. Therefore, the simulation result agrees well with the test result, the established full parameter damper model is validated, the model would be accurate in predicting damper parameter effects in further high-speed train dynamics research and vehicle design.