1. Steel rotor dimensions. Each bearing has stiffness of 1
Steel rotor dimensions. Each bearing has stiffness of 1.8E7 N/m times a variable multipler (see critical speed map)

2. Flexible Rotor Critical 82hz
Critical Speed Map
Slide 4
49hz
Slide 5
Flexible Rotor Critical 82hz
Slide 3
Rigid Rotor
Critical 1.9hz

3. Bearing Stiffness Multiplier 0
Bearing Stiffness Multiplier > Rigid Rotor Critical Modeshape

4. Bearing StiffnessMultipler 1 -> 1st Critical Involves some bearing flexing and some rotor flexing.

5. Bearing Stiffness 1000 -> Flexible Rotor Critical