Spring 2015 Course Attendee Reviews:

Practical Rotordynamics for Real Machinery

April 20 - 23, 2015 in Charlottesville, VA

Instructors: Malcolm E. Leader, Mark Corbo, Erik Swanson


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Thanks again to all of the participants!


Spring 2015 DyRoBeS Feedback Results

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Excellent/YesOKPoor/No
1The instructors knowledge of DyRoBeS was:9
2The exercises to practice using DyRoBeS were:72
3The pacing of the course was:54
4The amount of material covered was:72
5The amount of interaction encouraged was:9
6Was your interest held?9
7Was your time well spent in the course?9
8Would you recommend this course to others?9
9Would you recommend this group of instructors to others?9

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Responses to "What was particularly helpful about the course?"

  • Shows the power of this tool very well
  • Definitely the workstop was quite useful and practical.
  • Don't know enough to know how helpful yet
  • Good introduction to the program & continuation of the past week's discussions
  • Explanation of using multiple layers & shafts
  • Ability to actually use the software


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Responses to "What would you recommend changing about the course?"

  • Possibly a pre-course exercise w/Dyrobes trial available earlier
  • Test case comparisons to model solutions.
  • Demos pre-tested; move the Dyrobes intro part to end of Thursday to allow more hands on
  • Include addl exercises to use with demo version
  • It could possibly be longer/more indepth with combining beperf with rotordynamics
  • I flew through the examples with pretty much no use of Dyrobes prior to I think more could be covered


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Responses to "Now that you have completed this course, what additional training (if any) would be helpful?"

  • More time on the program/likely more questions will arise
  • Not sure
  • More use of program
  • Learning specifics about what approximations to raise for different circumstances that might arise as we find them
  • Just more practice with more complex systems


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Other comments or feedback:

  • Program looks good. Not sure if it is an ideal match for my company's core product (transmissions) with AMESim already our core plant modeling simulation tool. Clerly Dyrobes is superior to AMESim for the specific tasks it does.
  • It would be nice to share contact info of all students with class, unless requested not to shre.
  • Thank you for putting this course together
  • I get the point of the rotordynamics course is not to promote a specific software but I would have preferred it to be more integral with Dyrobes use.



Spring 2015 Rotordynamics Short Course

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Excellent/YesOK/Yes and NoPoor/No
1The instructors knowledge of rotordynamics was:19
2The pacing of the course was:109
3The amount of material covered was:136
4The amount of interaction encouraged was:1072
5Was your interest held?163
6Was your time well spent in the course?1711
7Would you recommend this course to others?1711
8Would you recommend this group of instructors to others?181

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Responses to "What was particularly helpful about the course?"

  • Good insight into the whole vibration process; exposure to areas of my company would not normally see
  • The repetition of the important concepts was well received to help reinforce key concepts
  • Hard to pick any one thing; some of the lateral was most interesting plus eval of many brg styles
  • Gaining a much better general understanding of rotordynamics & what factors influence the study
  • The practical cases by Malcolm. Not gonna use program myself.
  • The overall topics and broad background give a very good understanding of the topics. The case studies are particularly interesting to help relate the mountains of information from the lectrues into real-world applications.
  • Knew this stuff happened but never knew how to calculate it
  • Reviewing the theory & application of rotordynamics & then showing real life issues with corrective actions
  • Real world examples
  • Insights/examples from personal experience going beyond the textbook
  • Quite a bit of resources, papers, info, formulas
  • Insight info how other industry deal with lateral and torsional vibration; have some good references to apply to my industry
  • Wide range of topics with a great deal of experience in instructors.
  • New subjects, VFD - recips - torsionals.
  • The lesson case study structure; specifics on bearing design, Malcolm's graphs on how specific parameters of a system and bearing design affect stability; VFD discussioins; pretty much everything not specific to pumps
  • Rotor lateral background and effects of changes in weight, span, stiffness, damping
  • I found the side remarks, not necessarily on the slides, to be of enormous help to gain from the expertise of the instructors as particulaar thing to emphasize; the rotordynamics/torsional part was particularly enlightening
  • Practical examples of multiple pieces of equipment that we are familiar with (pumps, turbines, compressors axial & centrifugal coupling)


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Responses to "What would you recommend changing about the course?"

  • Too much time: req'd features of rotordynamics program; much of this common sense; fluid film bearings
    Not enough time: rolling contact bearings, planetaries, case studies
  • Provide addl workshop opportunities during the course; for instance, the fatigue calculation for torsional response would be beneficial
  • Align file names w/the references in the agenda; more intermix of lateral & torsional; not to be picky but vib basics could be brought up to date & also address REB's rather than only journal brgs.
  • Use of workshops could enhance understanding
  • More cases for me practicality experience
  • If more interactions during the lectures were utilized, the longer presentations may be easier to stomach.
  • Make sure students play with XL rotor or Dyrobes before the class so we know what is part of modeling
  • Not sure how other companies are structured but a lot of information covered didnít apply to my company product line. A possible recommendation would be to separate by equipment type.
  • It would be good to go through a full lateral/torsional report to review. It would be good to point out specific area that you need to pay close attention
  • Removing general, super basic signal analysis stuff and adding rotordynamic specific rotordynamic items like the "full spectrum". Adding more detail of modeling supports/cases.
  • More on the basics of certain topics; more examples/problems and procedure to walk through together; in depth on thought process
  • More theory at beginning; more example from other industry
  • It was a tremendous amount of "death by PowerPoint" where the instructor read line after line of text
  • Not much at all.
  • Not sure. Possibly more case studies.
  • Maybe a suggestion to have a case study in the Dyrobes code done at the end of each day addressing each topic (torsional, lateral, etc.) in order to learn the foundation and keep on exercising
  • Homework assignments to allow us to grasp the theory, the workshops were given but not reviewed in class


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Responses to "Now that you have completed this course, what additional training (if any) would be helpful?"

  • More references; continued contact with instructors as a help resource
  • Mechanical & electrical design of rotating machinery
  • This course has highlighted how muck I do not know and how much I have to learn; recips & torsional analysis seems very complicated
  • Grouping failures in categories; refreshers
  • Any additional training for turbine-specific RDA applications. Most of the examples and material was for other components and the turbine itself was mostly mentioned in passing.
  • Give 3 month trial of Dyrobes; contact info on USB
  • TBD
  • More specific training on specific machine types
  • Probably my own fault, but I expected a course on rotordynamics troubleshooting. The course description should put more emphasis on the fact that it is a rotordynamics computer modeling course.
  • Hands on rotordynamic modeling
  • Bearing design
  • I would like to be involved in the execution of real life examples to learn about the process of modeling, I am thinking about how this can be realized (internship or similar approach would help)
  • A 6 month follow-up on Dyrobes and/or lecture topics. Maybe a webinar or blog session.


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Other comments or feedback:

  • Course is very heavy on process/plant rotordynamics; more balance toward general TVA of machinery and some marine applications would be helpful for my company (hydro mechanical transmissions)
  • Listing of students phone number/email address would be helpful for future contacts
  • Nice location; good room setup; great classroom feel; pre-class contact & interactions was good!
  • Good course. Thank ya'll for putting it together.
  • Overall, very informative and helpful
  • Have all students solve the same problem and go over it
  • Instructors were extremely knowledgeable & made the course fun. I learned so much from attending the course.
  • Good course; a new sound system that doesn't go in & out
  • Case studies are good but one instructor was too long winded in his explanations. Could do it in 1/4 the time.
  • Encourage more interaction. One instructor was particularly poor at this as he hardly ever looked at class. Also materials in so many words seem dated.
  • Whiteboard drawings should be in PowerPoint.
  • Way too much information to absorb in 4 days, so being able to take away the presentations & papers is definitely necessary
  • The experience on practical cases shared by M. Corbo and M. Leader in particular was unique and first class learning experience in industry.
  • List of students and emails (voluntary participation) so we can call each other to ask questions on application of Dyrobes; keep the lecture without specific examples from Dyrobes (like the Friday session)


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Comments on group dinner, restaurant, transportation:

  • All great!
  • Very good, very well planned, outstanding arrangement.
  • Dinner good; Restaurant transport good; hotel: internet good; noise bad; housekeeping inconsistent
  • Nice
  • The group dinner was great. Honestly, I wish that facilitation was better for any other meals (not paid for, of course). I feel like it would have been worthwhile to have smaller group lunches that maybe rotated to stimulate interactions between the students from vastly different industries.
  • Great
  • All were good only comment would be a larger menu would have been nice but the food was good; hotel internet was an issue, disconnecting often.
  • Include hotel Sunday before the course in the special pricing
  • All excellent
  • Ok
  • Fine
  • All great!
  • All the above mentioned were fine; Charlottesville and UVA are absolutely beautiful.
  • The dinner was good; they handled the group quite well; also, the hotel is great too; good location.
  • It is all okay. Thank you
  • Group students together for evening - voluntary and not paid by class tuition (each student pays) but it allows more networking and discussion of topics.