The fixed-speed vertical motor exhibited a significant amplitude even when stationary.During operation,waveform distortion was observed at the drive end,while the non-drive end exhibits greater vibration compared to the drive end.Vibration at non-drive end appears higher in the east-west direction than that in the north-south direction,and there was considerable fluctuation in the amplitude.Analysis,disassembly,and experimental validation revealed that the waveform distortion at the drive end was caused by dynamic-static friction,excessive vibration at the non-drive end was due to flange resonance,inadequate support stiffness caused higher vibration in the east-west direction,and fluctuation in the amplitude was caused by beat vibration.The issue of abnormal motor vibration is resolved by welding channel steel at the flange and implementing vibration isolation materials.
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