Experimental Research on Abnormal Vibration for A Metro Bogie
Aiming at the abnormal vibration issue of a certain type of bogie during service,based on Miner's cumulative damage theory and equal damage principle,the time-frequency characteristics of wheel-rail vibration transmission are used to carry out experimental research.The test results show that in the equivalent stress amplitude of the bogie frame,the energy in the low frequency section within 100 Hz accounts for the largest proportion,and the energy in some positions near 70 Hz accounts for 18.78%-33.85%.Combined with the theoretical calculation of bearing fault frequency,test main frequency comparison and dismantling judgment,the main vibration frequency of 70 Hz is caused by the defect fault on the outer ring raceway of the bearing;considering that the vertical vibration of the axle box has a main frequency of 63 Hz,which is similar to the elastic mode of the frame,which aggravates the steering to a certain extent.The vibration frequency of the line fasteners is concentrated at 350 Hz and 430 Hz,which has a greater impact on the wheel-to-axle box system and less on the frame.The research methods and conclusions can be used as a reference for solving similar problems such as local vibration of the bogie,and provide a certain reference value for the structural design and operation as well as later maintenance management of metro.
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NSTL
万方数据
维普
