MEng5304 - Rotor Dynamics

Department of Mechanical Engineering

College of Engineering and Technology, Aksum University

Course Number MEng5304

Course Title Rotor Dynamics

Degree Program B.Sc. in Mechanical Engineering

Module Mechanical Design Electives

Module Coordinator NN

Lecturer NN

ECTS Credits 5

Contact Hours (per

Semester)

Lecture Tutorial Laboratory/Practice Home Study

32 48 0 55

Course Objectives &

Competences to be

Acquired

Course Objectives

Upon completion students should be able

To formulate physical and mathematical models of complex rotor

- bearing - foundation systems.

Solve the mathematical model by means of analytical and

numerical methods for equilibrium position and forced vibration.

Assess stability of solutions. Understand the dynamic phenomena

that can be encountered in the rotating machinery.

Course Description

Modeling of shafts, rigid and elastic elements, bearings and

foundations; composition of mathematical model of rotor systems;

condensation techniques; analysis: equilibrium position, response to

the external excitation, free vibration, stability of equilibrium

position; influence of the internal and external damping; influence of

the gyroscopic effect and rotor with non-circular cross-section;

passive and active control of vibrations.

Course outline

1. Introduction to Rotor Dynamics.

2. Discussion of Journal bearings: Motion of

shafts in bearing, Basic Vibration Principles

and Definitions, Bearing stiffness and damping

coefficients.

3. Entering the World of Rotor Dynamics: Rotor

supported on rigid supports, Rotor supported on

flexible supports, rigid and elastic elements,

modeling of shafts, bearings, and foundations.

4. Rotor Dynamic Analyses: Composition of

mathematical model of rotor systems,

Undamped critical speed analysis, Unbalance

response analysis, Damped eigenvalue analysis,

Stability analysis, Technologies to Improve the

Stability of Rotor-bearing Systems.

5. Condensation techniques; analysis: equilibrium

position, response to the external excitation,

free vibration, stability of equilibrium position.

6. Influence of the internal and external damping;

influence of the gyroscopic effect.

7. Rotor with non-circular cross-section

8. Passive and active control of vibrations

Pre-requisites MEng3072(Mechanical Vibration)

Semester 6th

Status of Course Professional Elective

Teaching & Learning

Methods

• Lectures supported by Lab, Assignments, and Tutorials,

• Project work.

Assessment/Evaluation &

Grading System

Continuous assessments

-Minimum of (50%)

Final examination

Attendance Requirements

Minimum of 80% attendance during lecture hours; and

• 100% attendance during project work sessions, except

for some unprecedented mishaps.

Literature Reference:

1. Agnieszka Muszynska, Rotordynamics (Mechanical Engineering

(Marcell Dekker)), May 20, 2005.

2. Giancarlo Genta, Dynamics of Rotating Systems (Mechanical

Engineering Series), April 22, 2005.

3. Robert B. McMillan, Rotating Machinery: Practical Solutions to

Unbalance and Misalignment, Dec 2, 2003.

4. Rotating Machinery Vibration, M.L. Adams jr, Marcel Dekker

Inc., 2001

5. Handbook of Rotordynamics, F.F. Ehrich, Krigeer Publishing

Company, 1999

6. Rotor Dynamics, Rao,J.S., New York: J. Wiley 1983.