Electro-mechanical coupled modeling and vibration characteristics analysis of high-speed train transmission system
To investigate the vibration characteristics of the high-speed train transmission system during operation,this study established an electromechanical coupling dynamic model based on multi-body sys-tem dynamics theory and AC drive theory,utilizing Simpack and Simulink.The vibration characteristics of the transmission system,with and without wheel-rail excitation,were analyzed.The accuracy of the model was validated by comparing the simulated and measured vibration acceleration data in both time and frequency domains.The comparison between conditions with and without wheel-rail excitation revealed that,in the absence of wheel-rail excitation,the vibration amplitude of the transmission system is rela-tively small,with the primary frequency component in the frequency domain being the internal gear mes-hing excitation frequency.However,under wheel-rail excitation,as the operating speed increases,the vibration amplitude of the transmission system increases sharply.At low speeds,the dominant frequency in the frequency domain is the gear meshing frequency,while at high speeds,the wheel polygon effect be-comes dominant.The comparison of conditions inside and outside the phase separation zone showed that motor torque significantly increases the vibration amplitude of the transmission system,and the dominant frequency components of gear meshing frequency and wheel polygon effect become more pronounced in the frequency domain.The results indicate that,due to the unique service environment of the high-speed train transmission system,motor torque and wheel-rail excitation have a significant impact on the system's vibration.Therefore,the coupling effect of load and excitation must be considered in the design of the transmission system.
万方数据
维普
