Spring 2014 Course Attendee Reviews:

Practical Rotordynamics for Real Machinery

March 24 - 28, 2014 in Charlottesville, VA

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


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Thanks again to all of the participants!


Spring 2014 DyRoBeS Feedback Results

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Excellent/YesOKPoor/No
1The instructors knowledge of DyRoBeS was:8
2The exercises to practice using DyRoBeS were:71
3The pacing of the course was:71
4The amount of material covered was:62
5The amount of interaction encouraged was:8
6Was your interest held?8
7Was your time well spent in the course?8
8Would you recommend this course to others?8
9Would you recommend this group of instructors to others?8

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

  • Interactive and open nature of course
  • Helpfulness of instructor
  • How to create a model in DyRoBeS. How to create model levels.
  • Learning the little tricks of the lateral analysis (OFF SET), couplings, and layers (levels).
  • Learned about Be Perf
  • Combination of demos & examples
  • Preparatory slides w/theory to start working in Dyrobes
  • General use & model building
  • Will get further use by playing around in next couple of days


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

  • Perhaps go 2 days
  • More flexible DyRoBeS license, this is very important.
  • Little bit faster paced (in easy stuff)
  • The main issue I have with Dyrobes is understanding how to troubleshoot - so perhaps a section with shows main errors and the methods to fix them
  • Specific to equipment (eg pumps, compressors, etc) however will not be able to cater for everyone.


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

  • More indepth, machine specific training.
  • Just using it for specific jobs


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Other comments or feedback:

  • Would be more useful for exercises if not limited by trial
  • Clear and easy (wish I took this course a year ago)



Spring 2014 Rotordynamics Short Course

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Excellent/YesOKPoor/No
1The instructors knowledge of rotordynamics was:29
2The pacing of the course was:1415
3The amount of material covered was:245
4The amount of interaction encouraged was:2081
5Was your interest held?281
6Was your time well spent in the course?281
7Would you recommend this course to others?29
8Would you recommend this group of instructors to others?29

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

  • Learning Dyrobes
  • The power points were provided in advance so that we could follow along. I also enjoyed rotating speakers
  • Understanding fundamentals of lateral analysis
  • Great balance of theory and practical implementation
  • Effective at pointing out a lot of subtleties that arise during analyses
  • Learning how to modal complex systems accurately
  • Transient analysis for synchronous motor drive train
  • API684 requirements - stability analysis
  • Rotordynamics tools for solving vibration problems
  • The first 2 days of material
  • Detailed knowledge of instructors, several case studies & a practical approach towards rotordynamics
  • The course is practical and lecturer's consulting and troubleshooting experience helps a lot
  • The math formulas on the first day. The bearing types and their advantages/disadvantages
  • Torsional topics
  • The course content instructors background & experience. Covering the pump was also great.
  • An understanding of things to look for & potential solutions to lateral & torsional analysis
  • Case studies covered were excellent info
  • More complete understanding of lateral & torsional vib analysis
  • Practical applications of theory. I enjoyed the case studies which highlighted how the analysis resulted in a solution
  • The first day repetition of the basics. Also the basics for torsional analysis
  • Changing up presenters throughout day w/good to keep the flow
  • Modeling, campbell diagrams
  • Rotordynamics of different bearings
  • Case studies
  • All models in DyRoBeS which is the software I use
  • Theoretical and practical experience were demonstrated
  • Greater insight into reviewing lateral/torsional report
  • Verify some confusing concepts and practical experience
  • Case studies and being able to talk w/the instructors between sections
  • The repetition of the first day was helpful. I also appreciated how in-depth the course went into journal bearings
  • VFD's, motors, bearings design considerations to problem solve any issues
  • Sections on motors, couplings, and bearings and how they affect rotordynamics
  • Journal bearings and VFD info as it relates to torsional analysis
  • Case studies and general overview of versions machine types & solutions
  • The parametric summarized w/plots gave me a good sense of their influence on rotordynamic behavior
  • Torsional analyses
  • Torsional analysis, VFDs, bearings topic


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

  • Less academic approach - more case studies and practical approaches would be nice
  • I do not work with rotordynamics on a regular basis - it is one of many machinery topics that I work with (a machinery generalist - that needs some familiarity with as many aspects of the machinery field as I can have). This course significantly expanded my knowledge of not only rotordynamics but of machine design, vibration analysis, balancing, and how these topics come together.
  • Some speakers were not very dynamic and did not hold my attention at times. I felt in some cases there was less focus on ensuring we understood the topic and more on presenting their work.
  • Limit a person's questions if they obviously don't know what they are talking about (can be discussed afterwards)
  • More information on multilevel modeling and full train lateral analyses
  • Keeping a tentative end time @ 4:45pm might give you some time at hand. Of course, the material has to be compressed accordingly to accommodate delays
  • Breakout sessions for compressors/motors/turbines/pumps from 5-6pm
  • I would prefer a lot more "visual" aids. Photographs of installation and even things like the bently rotor model for examples. Maybe even class generation of critical speed maps and campbell diagrams. I know the workshop sheet are provided, however maybe we could find our own solutions to problems for given case studies. Just a thought
  • A little more on the basics
  • Build in more schedule "float" to allow things to get behind and then catch up.
  • I would want to see more on large wastewater pump stations w/long drive shafts from floor to floor
  • Add more math. Offer a day dedicated to Power Gen
  • Handheld lectures or lecture numbering would be easier for note taking
  • Less torsional more lateral modeling
  • Reduced scope. There is too much for 4 days. Things were rushed which made it very difficult to absorb
  • More quickly take specific discussion w/students offline and continue w/course. Go over worksheets
  • 7am - 4pm to allow tourist activities
  • The time of start and end. 7am - 4pm would have been nice. UVA has lots of historical sites that close around 5-6pm.
  • Separate 2-3 day hands on courses in Dyrobes and XL rotor (separate classes)
  • Less depth for general course & move it to the optional modeling day or days at end of course
  • Seems to be a little redundant in some of the lectures i.e. some topics were somewhat covered by more than once by the instructors


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

  • More Dyrobes
  • Overall the course material seemed appropriate - no major changes recommended
  • How to properly perform a modal (or ring) test on support structures, and/or apply a load in FEA to determine support stiffness (both vertical and horizontal)
  • Provide case studies in modeling procedure
  • 1 on 1 time going through a specific model/assumptions made for our particular product
  • Something more on the vibration instrumentation front
  • Equipment specifics what to watch out for
  • More in-depth torsional/fatigue type analysis
  • More hands on course
  • To really benefit from this training I would need to carry out analysis. My fear after courses like this is if I donít use it I will lose it
  • Quick/short workshops on basics
  • My applications are specific to dry gas seal upgrades. With this limited scope, the course thoroughly covered everything that I needed
  • Frame - rotor modeling
  • Application of rotordynamic, mainly balancing & testing
  • Machinery specific training and specifics of how to set up RDA models
  • Training on how to set up torsional analysis for specific cases
  • More front end/applications training. Could be completed with more case studies
  • All trainings are beneficial. Sometimes taking the same one over and over is a good thing. I would like to take some training on drivers sometime.
  • In-depth course on modeling in XL rotor and Dyrobes. Maybe a 2-3 day course. I can only speak on XL rotor but I do not believe there are any courses on modeling problems in XL rotor
  • Pump specific course
  • More discussion on non-linear rotordynamics and magnetic influence for induction motor.
  • A few more specific training in lateral and torsional for vertical pumps


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Other comments or feedback:

  • Holding the course in a more accessible city
  • The hotel was good/nice overall
  • Appreciate all of the papers in addition to the course presentations
  • The talks usually went over time. I would suggest re-evaluating the slides and condensing the information to make sure the slides fit the same slot.
  • Great job!
  • The course is extremely excellent
  • There was good time for 1 on 1 questions outside of the training
  • Marriott is good. Can we have the group picture emailed to us with all participants identified in it?
  • Hotel wasnít hard to find and having a room with the training in the same place made everything super easy
  • Well structured. V. good with use of care studies. I like the real word engineering approaches rather than the usual scientific lab approach
  • Hotel was good but a breakfast buffet would be good, quicker
  • None - possibly divide it into different courses because the topic is so big, however this might take away many benefits
  • Use of nomenclature/terminology/vocabulary gets a bit esoteric at times
  • Extremely satisfied. Much better than the bearings plus short course for content and leader interaction
  • Include some example analysis reports on the USB from each of the presenters companies
  • Recommend morning snacks for break
  • Great classer for starter
  • Coffee available all day
  • May need to limit some peoples question time
  • Be more clear when information is based on experience and disagrees with theory
  • Would have preferred a few more case studies
  • When presenting case studies and questions are asked as a different approach to solve field issue - state if that could use a potential "fix" rather than defending the overall outcome
  • The location for the course was excellent. The accommodations were outstanding. The hotel did a great job. Local restaurants were close. Highly recommend keeping the course here in future event.
  • Course should be split into various levels & focuses that could be provided in 1-2 days each
  • Everything was excellent. Great hotel.
  • Pace of the course perhaps limited the encouragement of interaction with the participant


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Comments on group dinner, restaurant, transportation:

  • More social activities (dinners, etc) would be nice for getting to know people & networking
  • Did not attend dinner
  • The group dinner was appreciated, though the food selection was limited. Transportation was great, driver was very friendly.
  • Great food!
  • It is great, no comment
  • Dinner was good - we stayed at a different hotel/enjoyed the walkability from the training hotel
  • Thank you, ok, good
  • PTO
  • Group dinner was good (food, location, everything). In the UK (possibly US) lunch tends to be group dinners organized within the hotel - this tends to result in more networking and discussion
  • Good
  • Group dinner and restaurant was excellent considering the numbers involved. Hotel & transportation & room was great.
  • Pay for bar drinks with dinner
  • Need more choices
  • Cookies each afternoon were great
  • Hotel was very good no complaints
  • Providing dinner the first night helped break the ice w/class
  • Restaurant was good choice & good format & good location
  • Excellent
  • Hotel had no free breakfast which sucked but tolerable. Great location for walking & food.
  • Good
  • All was great. Thought it was a really nice touch.
  • Dinner was good - hotel good - good location
  • Wonderful. Good food. Interact and meet others. Transport was timely but really nice to have the choice to walk.
  • Dinner was excellent
  • Good
  • Dinner was good. I walked
  • Awesome. Thanks again!
  • Very nice hotel and good accommodations. Nice group dinner. Perhaps including lunch as part of the course will be beneficial from the networking point of view.