Page 268 - Machinery Component Maintenance
P. 268
250 Machinery Component Maintenance and Repair
Direction Of
Rotor Rotation
Pr inc i pa 1 Pencil Mark
Inertia Axis
("high spot")
Shaft Axis and
Axis of Rotation
Below Resonance Princial
Inertia Axis and
Axis of Rotation
Re so nanc e 2 x Resonance
and higher
Figure 6-8. Angle of lag and migration of axis of rotation.
Figure 6-9. Angle of lag and amplitude of vibration versus rotational speed.
