Vibration Characteristics of High Speed EMU Bogies Under Rail Corrugation Disturbance
Based on time-domain analysis,frequency-domain analysis,time-frequency analysis,and statistical analysis methods,the vertical vibration acceleration of the axle box,frame,and vehicle body in a high speed railway track corrugation section was taken as the research object.The vibration transmission mechanism of the high speed EMU axle box-frame-vehicle body under rail corrugation excitation was studied,and the vertical vibration transmission laws and frame vibration characteristics were summarized.A Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)and time-frequency analysis method CEEMDAN-SPWVD for Smooth Pseudo Wigner Ville Distribution(SPWVD)based on adaptive noise were proposed.Case analysis was conducted using vehicle dynamic response system test data,and on-site verification was implemented.The results show that the maximum vibration amplitude of the corrugation section frame is about 1.88 times that of the non-corrugation section,and the total root mean square acceleration in the corrugation section of the 500～600 Hz frequency band accounts for 65.12%of the total root mean square acceleration in the entire frequency band range,which is much larger than the proportion in the non corrugation section(4.56%).The CEEMDAN-SPWVD method proposed in this article can effectively identify the corrugation section,and the theoretically calculated grinding wavelength is close to the on-site measured wavelength.
high speed railwayvibration characteristicnumerical simulationrail corrugationbogie frameCEEMDAN-SPWVD
万方数据
维普
