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Spring 2021 (March 22-25)
Cost = $1950

Dear Clients, Friends, & Associates:

As a result of the highly favorable reviews we received for its first dozen offerings in 2012 through 2020, I am pleased to announce that we will be repeating our week-long rotordynamics training course this coming March. The course, entitled “Practical Rotordynamics for Real Machinery” will be presented the week of 22 March, 2021.
Because of the COVID travel restrictions, we will be presenting this course virtually for the first time. We had a "trial run" at the Turbomachinery Symposium in December, presenting some of the same info. that is in this course, and the reviews were excellent. Still, since we have not done this virtually before, we are offering a substantial discount on the cost of the course.
Since the course focuses on three major topics, we have three expert instructors participating, as follows:

  1. Lateral Rotordynamics – Malcolm Leader, P.E. (President - Applied Machinery Dynamics)
    Malcolm has long been known as one of the best rotordynamicists in the world and is also well-known for his keen troubleshooting abilities. He has written several dozen papers on these topics.

  2. Bearings – Dr. Erik Swanson, P.E. (President - Xdot Engineering and Analysis)
    In addition to traditional fluid-film bearings, Erik is well-known for his expertise in foil and magnetic bearings. Additionally, Erik is a wizard at using the DYROBES rotor/bearing computer code, which all of the presented case studies have been done in.

  3. Torsional Vibration – Mark A. Corbo, P.E. (President - No Bull Engineering)
    In addition to having authored some of the most well-known and best-received papers on the subject, I am currently serving as the Chair for the Torsional section of the API 684 rotordynamics tutorial.

Although the syllabus from last year's course is probably going to be “tweaked” a bit, some of the topics that will be addressed in depth include the following:

  1. Fundamentals/Basics
  2. Relevance of the various topics (i.e., why do we even care about this?)
  3. Modeling tips
  4. Undamped critical speed maps
  5. Unbalance response analysis
  6. Rotordynamic instability
  7. High pressure compressor stability analysis
  8. Pump rotordynamic considerations
  9. Fluid-film bearing types
  10. Tilting-pad bearings
  11. Specialized bearings (i.e., magnetic bearings, foil bearings, etc.)
  12. Seals
  13. Undamped torsional analysis
  14. Torsional Campbell diagrams
  15. Variable frequency drives
  16. Torsional response analysis
  17. Synchronous motor start-up analysis
  18. Reciprocating machine torsionals
  19. Machinery specific considerations
  20. API specifications and compliance
  21. Case studies

The course, which will cover all of the above topics, will run from Monday through Thursday (22 through 25 March) and cost $1950 (plus $95 fee if paying online) per participant. In addition to the formal sessions, if there is interest, we will be happy to host a short Q&A session on Friday the 26th. Additionally, we will ensure that there will be plenty of time for informal interaction with all three instructors, including breaks and lunches.

Some of the benefits you would receive from taking this course include the following:

  1. A greater familiarity with lateral and torsional rotordynamics which would allow you to communicate more effectively with experts in the field.

  2. A better understanding of the meaning and validity of rotordynamic results obtained from consultants and/or in-house rotordynamic codes.

  3. A better understanding of the rotordynamic causes of common rotating equipment problems which would assist you when trying to troubleshoot field and test-stand problems.

  4. A better feel for which system elements play an important role in rotordynamic behavior and which ones have little impact. This would be valuable when evaluating potential design changes.

  5. An appreciation that rotordynamic analysis can be performed in a practical and timely manner and does not require a “research project.”

  6. An appreciation for the large role that rotordynamic behavior plays in the reliability of rotating equipment and for the importance of evaluating that behavior in the design stage.

To learn more about the course, please either e-mail me or call me personally at (941) 896-8174. If you are interested in this subject but are not able to personally attend the course, I would be happy to provide you with reprints of the technical papers that my portion of the course is partially based on.

Hope to see you there!

Best Regards,


Mark A. Corbo, P.E.

President & Chief Engineer

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