Thanks for reply. That article emphasized on the stiffening due to CF load. In real engine test, the softening effect due to temperature (especially for turbomachinery) actually was built in the stiffness ( where you wrote K2= k1 + K3*w^2). That's why some of the frequencies of some natural...
Thanks. I agree with you. I am talking about component dynamics and there is no gyro included.
How do you come up with this equation f=sqrt (a+ b*ω^2) ? Is it listed in any document ?
To my understanding, it is actually one of the formulas used by many industries.
a = f0^2 b =...
I would like to discuss different ways of creating the Campbell Diagram (from FEA results) used in dynamics. If you have frequency at bench (70F and zero speed) and frequency at the max speed (with temperature), you can either connect these two points directly by a straight line, or you can...