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Fundamentals of Rotating Machinery Diagnostics

Donald E. Bently
Donald E. Bently
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Charles T. Hatch
Charles T. Hatch
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Bob Grissom
Bob Grissom
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ASME Press
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Rotor systems are subjected to many kinds of forces. Forces can act in radial and axial directions, and torques and moments can act in angular directions. These forces can be static, or unchanging in direction and time, or they can be dynamic, where they can change in magnitude or direction with time.

Introduction to Modeling
The Coordinate System and Position Vector
Lambda (λ): A Model of Fluid Circulation
Fluid-film Bearing Forces and Stiffnesses
Other Sources of Spring Stiffness
The Damping Force
The Perturbation Force
The Free Body Diagram
The Equation of Motion
Solution of the Equation of Motion
Nonsynchronous Dynamic Stiffness
Amplitude and Phase of the Vibration Response
The Attitude Angle: Rotor Response to a Static Radial Load
Synchronous Rotor Response
Synchronous Dynamic Stiffness
Predicted Rotor Vibration
The Benefits and Limitations of the Simple Model
Extending the Simple Model
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