I am refering to the rpm where a machine's resonance frequencies will cause vibration to the point of self destruction. Within all industry it is important to run up a machine through its critical speed as quickly as possible, whether it be a pump, compressor, turbine or other mechanical device.
Due to adverse road conditions the other day I spent a lot of time around 3500 - 4000rpm at some point between these rpm the vibration was excessive and after a 200 mile ride I found various bolts had worked themselves loose, one side stand bolt fully fell out, the other was half way out and various other bolts had loosened.
A lot of work & time offshore is spent on condition monitoring and vibration analysis to prevent this on all rotating equipment, I am just wondering if anyone has noticed higher vibration at specific revs
some are aware of critical speeds, others are not, ideally when a critical speed is established it should be avoided.
Last edited by F4-1NXS; 11-19-2012 at 12:24 PM.