COURSE OVERVIEW:

Rotor dynamics fundamentals for plant engineers provides a specialized technical deep dive into the behavior of rotating shafts and the structures that support them. Unlike static mechanical analysis, rotor dynamics accounts for the gyroscopic effects, damping, and stiffness of fluid-film bearings and the interaction between the rotor and the casing. This course is essential for engineers working with high-speed machinery like centrifugal compressors and steam turbines, where operating speeds often cross multiple critical frequencies.

The scope of this course includes the study of lateral and torsional vibrations, critical speed analysis, and rotor stability. Participants will learn how to interpret complex diagnostic plots, such as Bode, Nyquist, and Waterfall diagrams, which are used to track machine behavior during transient states (startup and shutdown). The coverage also explores the "Jeffcott Rotor" model as a baseline for understanding how unbalanced forces behave as a machine approach and pass through resonance.

Additionally, the curriculum addresses the influence of the "support system," including the effects of pedestal stiffness and the hydrodynamic properties of journal bearings on overall machine stability. Engineers will gain the skills to identify sub-synchronous instabilities like oil whirl and oil whip, which can be catastrophic if not properly managed. By understanding these advanced dynamics, plant engineers can better evaluate equipment design, troubleshoot persistent high-vibration issues, and ensure the safe operation of high-energy rotating assets.

COURSE OBJECTIVES:

After completion of this course, the participants will be able to:

1. Explain the fundamental differences between static and dynamic rotor behavior.
2. Define "Critical Speed" and its significance in high-speed machinery.
3. Analyze the effects of rotor mass and stiffness on natural frequencies.
4. Interpret Bode and Nyquist plots to identify resonance and phase shifts.
5. Distinguish between lateral and torsional vibration modes.
6. Evaluate the impact of gyroscopic forces on overhung rotors.
7. Understand the role of damping in controlling vibration amplitude.
8. Describe the hydrodynamic forces in journal bearings and their effect on stability.
9. Identify the signatures of oil whirl and oil whip in high-speed compressors.
10. Utilize Campbell Diagrams to map interference between excitation and natural frequencies.
11. Predict the behavior of flexible rotors versus rigid rotors.
12. Assess the impact of "internal friction" and "cross-coupled stiffness" on stability.
13. Troubleshoot rotor rubs and their effect on thermal stability (Morton Effect).
14. Communicate effectively with machinery OEMs regarding rotor dynamic design.

TARGET AUDIENCE:

This course is specifically designed for Plant Engineers, Rotating Equipment Specialists, Machinery Design Engineers, and Advanced Vibration Analysts who work with high-speed turbomachinery.

TRAINING COURSE METHODOLOGY:

A highly interactive combination of lectures, discussion sessions, and case studies will be employed to maximise the transfer of information, knowledge, and experience. The course will be intensive, practical, and highly interactive. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. The attendants will also be encouraged to raise more of their questions and to share in developing the right answers using their analysis and experience. There will also be some indoor experiential activities to enhance the learning experience. Course material will be provided in PowerPoint, with necessary animations, learning videos, and general discussions.

The course participants shall be evaluated before, during, and at the end of the course.

COURSE CERTIFICATE:

National Consultant Centre for Training LLC (NCC) will issue an Attendance Certificate to all participants completing a minimum of 80% of the total attendance time requirement.