What is the difference between modes and nodes?
John from PA posted:
The attached will provide a pictorial of simple mode shapes for a rotor.
For extensive details, I suggest you review http://sandv.com/downloads/0505swan.pdf for material related to mode shapes.
According to this case study,
They had backward whirling during cost down and couse to drop resonance frequency .so it mentioned that this ocoures because of asymmetric bearing or nonlinerity stiffness . My question is what is the another source of backward whirl ?
Can it phenomenia help us to machin fault dedtection ? For example excessive bearing clearance or etc
I didn't have the benefit of the Internet when I was trying to learn this stuff!
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