PD4007 Rotor Dynamics Syllabus:

PD4007 Rotor Dynamics Syllabus – Anna University PG Syllabus Regulation 2021

OBJECTIVES:

The main learning objective of this course is to prepare students for
1. Apply and develop mathematical model of a system
2. Applying the design and suggest bearings for specific applications
3. Applying a fatigue life calculation for various types of bearings
4. Apply and analyze bearing behavior
5. Study the dynamics of rotors mounted on Hydrodynamic Bearings.

UNIT I INTRODUCTION TO ROTOR DYNAMICS

Torsional vibrations analysis – critical speeds and response to imbalance- Transfer matrix analysis- Instability of rotors- Gyroscopic effects

UNIT II HYDRODYNAMIC BEARINGS

Hydrodynamic Lubrication equation for dynamic loadings-Squeeze film effects in journal bearings and thrust bearings -Rotating loads , alternating and impulse loads in journal bearings – Journal center Trajectory- Analysis of short bearings under dynamic conditions- Finite difference solution for dynamic conditions.

UNIT III BALANCING OF ROTORS

Classification of rotors and balancing criteria, balancing of rigid and flexible rotors- balance criteria for flexible rotors

UNIT IV ROTOR DYNAMICS IN TURBOMACHINEY DESIGN

Motion of the shaft in the bearing- Rotor supported on rigid and flexible supports-Campbell diagram, Rotor Dynamic Analyses- Undamped critical speed – Unbalance response- Damped eigenvalue analysis- Bearing stiffness and damping coefficients- Mechanics of Hydro dynamic Instability- Half frequency whirl and Resonance whip- bearing instability and Oil Whirl Technologies to Improve the Stability of Rotor-bearing Systems–Design configurations of stable journal bearings.

UNIT V DYNAMICS OF ROTORS MOUNTED ON HYDRODYNAMIC BEARINGS

Hydrodynamic Lubrication equation for dynamic loadings-Squeeze film effects in journal bearings and thrust bearings -Rotating loads , alternating and impulse loads in journal bearings – Journal center Trajectory- Analysis of short bearings under dynamic conditions- Finite difference solution for dynamic conditions.

OUTCOMES:

Upon completion of this course, the students will be able to:
 understand application of various types of bearings and their operating principles
 design and suggest bearings for specific applications
 perform fatigue life calculations for various types of bearings,
 understand and analyze bearing behavior
 study the dynamics of rotors mounted on Hydrodynamic Bearings

REFERENCES:

1. Ehrich(ed.), F.F., 1992, Handbook of Rotor dynamics, McGraw-Hill.
2. Genta, G., 1999, Vibration of Structures and Machines, 3rd edition, Springer
3. Genta, G., 2005, Dynamics of Rotating Systems, Springer, NY
4. Goodwin M.J., 1989, Dynamics of Rotor-Bearing Systems, Unwin Hyman, Sydney.
5. Krämer E., 1993, Dynamics of Rotors and Foundations, Springer-Verlag, New York.