Abstract: On purpose to obtain high ride comfort in high-speed train, the modeling strategy which analyze the whole vehicle system coupling the equivalent linearization damper model is presented. Then the key components of damping changeable shock absorber depending on the vehicle model under excitation due to rail roughness is optimized. The optimized data indicated that damper design depend on the whole vehicle is more suitable than design separated it from the system. So this research is feasible and practicable.

Key words: Damping changeable damper, Equivalent linearization modeling, Optimizing modeling, Vehicle stationarity