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A shaft has two heavy rotors mounted on it The transverse...

This question belongs to Mechanical Engineering Theory Of Machine
Theory of Machine
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A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

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Correct Answer: Option A
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2 Comments
Vimala K
Vimala K 7 years ago
When two shafts 100+200 hz = 60 rpm * 60 (2).
rpm = 7200.
rpm the transverse natural frequency 1.35 to 1.5,
7200/1.3 =5367 rpm.
Bonthu Dileep
Bonthu Dileep 7 years ago
(1/f)=(1/10000)+(1/40000)
f=89.44hz
n=89.44*60
=5367rpm
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