My project has specified several 5 - 8 MW, 2-pole (3564 rpm) induction motors. The lateral analyses on these motors predict coupling-end vibration at the following:
- 4113 rpm, 3rd mode shape(exceeds run speed by 15.4%) - Motor A
- 7186 rpm, 4th mode (within 1% of 2X run speed and 2xLF) - Motor...