Rotordynamics
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bansidhar
I want to perform the transient analysis of a rotor which reaches the speed 50,000 rpm in 0.25 min and runs at that speed for 2 mins and ramp down to zero speed in 0.5 mins.

how to perfom the transient analysis and plot Amplitude Vs time or Amplitude Vs frequency plot.

kindly suggest.

regards,
bansidhar
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replied to:  bansidhar
arz83
Replied to:  I want to perform the transient analysis of a rotor which...
Hi
you should do a transient analysis
because your run uo has acceleration
you should update your forces because of unbalace

for this, you should calculate the kinitic energy of
unbalance mass. and then by fy and fz =-d/dt(dT/dydot,dzdot)
calculate the force at every step
do you have acces to ANSYS? IN help document is one example
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