Fall 2014 Course Attendee Reviews:

Practical Rotordynamics for Real Machinery

October 13 - 17, 2014 in Charlottesville, VA

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


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Thanks again to all of the participants!


Fall 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:62
3The pacing of the course was:53
4The amount of material covered was:71
5The amount of interaction encouraged was:53
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?"

  • Good overview of Dyrobes and its capabilities
  • Allowed some application of learning from previous lectures
  • Hands on exercises
  • Hands on sessions, preceeded by instructor demo & briefing
  • Ability to try out Dyrobes after four days of rotordynamics concepts
  • I found the demos Erik shared between the lectures and example problems to be very insightful


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

  • Nothing
  • Maybe a bit longer, but I would expect that there would be a higher level of training/support w/the software
  • Nothing
  • None
  • Go a little slower through torsional portion, more indepth; Maybe mix Dyrobes hands on into the concepts lectures to change gears through the week, not fully convinced this would be "better"
  • I only had access to the oder version 16.0 from the flash drive, which limited my ability to do some things. I recommend providing the most up-to-date version on the flashdrive as well as for download.


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

  • Maybe an advanced workshop looking at some specifically supplied student cases - kind of a workshop with consultants
  • Would require more time & practice of rotordynamics before addl training can be suggested
  • Need to play around with Dyrobes and learned knowledge from lectures and apply to a model specific to my work
  • I am not sure right now. I need to go digest everything and see where I stand.


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Other comments or feedback:

  • Great set of classes
  • Well done!
  • Try a transient analysis, but difficult to cram too much more into single day
  • The conference room arrangement worked great. The drinks and snacks were great. The hotel, overall, was good.



Fall 2014 Rotordynamics Short Course

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Excellent/YesOKPoor/No
1The instructors knowledge of rotordynamics was:22
2The pacing of the course was:139
3The amount of material covered was:184
4The amount of interaction encouraged was:10111
5Was your interest held?22
6Was your time well spent in the course?22
7Would you recommend this course to others?22
8Would you recommend this group of instructors to others?22

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

  • Fluid film bearing discussion; stability analysis & sources of excitation
  • How to interpret and use the undamped and damped response analysis plots. The case histories were also very informative.
  • Sessions on torsional rotordynamics and transient rotordynamics; Monday morning vibration and RD basics; Discussions of more obscure phenomena like Morton Effect and aero cross coupling; great topic depth (can always review slides)
  • Vibration theory & review; Corbo's lectures (applies to my work better)
  • Discussion of torsional analysis, tilt-pad bearings
  • Basic understanding without getting deep into theory.
  • I was fairly new to rotordynamics, so the overview and basics of general RD was particularly helpful
  • Real world examples
  • Going over the basics with the right mixture of discussion of concepts, theory and practical application
  • Case studies; lectures on stability
  • The API portion interested me as well as the first 2 days. I was a little overwhelmed with the later Wed sessions and Thur
  • It was practical, low theory, and everything was condensed and useful
  • Better understanding of rotating machinery design analysis, including lateral & torsional analysis. I gain a much better understanding of torsional analysis importance to be used in the design phase. I also enjoyed the cases presented by Malcolm.
  • The bearing descriptions and the case studies pertaining to them.
  • Great balance of basics, more complex topics, and real world examples to illustrate
  • Informative on the need for rotordynamics in high speed and also on interactions with electrical prime movers
  • Explanations on lateral CS & torsional analysis for those of us who don't have the background
  • The full immersion in rotordynamics to pics and the different point of view given from three different excellent knowledgeable instructors bearing overview.


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

  • Split the course specific to domain (compressors, others)
    Adding step by step procedure for solving the few problem will be very helpful
  • More engagement with class
  • 2 shorter breaks - bladder not that good
  • A little more depth on thrust balance and damper seals; maybe a half hour on different coupling types/options/designs
  • On the first day, the introduction to modeling seemed to go slow. Either it should be condensed or broken into several session
  • Leader spend more time on a fewer key examples to help learn & understand instead of several examples covered relatively short
  • More presentation on rolling element bearings
  • Nothing
  • I have no recommended changes to suggest
  • Reporting key item to include/exclude from reporting - making results easy for the customer to understand
  • In most all of the case studies there is a good discussion of the problem and the things done to fix it with results. For the new student a little more description of the diagnosis and all options that could be done might be helpful. To the expert, the options (such as stiffening the bearings when softer is needed) is discounted as obvious, but the new student could learn from that discussion that the expert knows from experience immediately.
  • Added lecture on how best to approach a new design (bearing selection and location)
  • As I'm not a rotordynamiscist, I can understand the level of difficulty with making a course that encompasses all issues in 1 week. I will add that I'm sharp as a tack in the morning. Maybe some group interaction on case studies in the afternoon.
  • More examples in each part of course are more beneficial
  • Make course material available on website. Many individuals are using tablet/pocket devices (ie iPads). I rarely carry my laptop anymore but in this case simply forgot mine.
  • Maybe let groups run through a case study and make recommendations before the fixed was revealed
  • Only things that might improve it would be more frequent/shorter breaks. All topics were of interest to me, but recip stuff was less interesting
  • More details for some of the case studies
  • I donít advocate excessive rhetorical (or otherwise) questions during a presentation, but this may have been on the other extreme. I think a little more class involvement could help solidify some of the concepts. Since some of the content is repeated, it might make sense to throw in some "what do you think will happen" when content is encountered a second time around.
  • To list argument can cause a decrease in people attention


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

  • Advanced level course; case studies/solving field problems; analyzing vibration data
  • More Dyrobes training
  • At this point I mostly need to get comfortably running rotordynamic analyses and read some further in depth papers to develop more specific or advanced questions.
  • Leader needs to fix his presentations, and have all info avail for class and future reference
  • See above
  • I am not sure right now
  • FEA for structural
  • Hands on trouble shooting
  • As a user, a course on vibration analysis would be helpful.
  • Disc & blade (fan) dynamics
  • Hoping that the Dyrobes training will be slightly less fast paced
  • Dyrobes hands on session is vital. Will be attending it on Friday.
  • Build a detailed rotordynamic model
  • After deepen all the argument Dyrobe (of course)!


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Other comments or feedback:

  • Trainers are knowledgeable and has very good exp.
  • Really enjoyed the course, well done
  • Should have taken a course like this many years ago; VFD session a little too long
  • Lectures on fatigue and campbell diagrmas were very good; nice to get exposure to a variety of turbo machines; more of a one stop shop for all references (books, websites, papers) would be good, like in a siingle list form
  • Good
  • This course should not become limited to notepads because some of us aren't allowed to have those due to nature of projects worked on
  • Access to the lectures and papers online, in addition to the flash drive would be great
  • It was good - thank you.
  • VSB material needs to be a bit more organized
  • Good dinner, good location, Charlottesville is kind of weird to travel to
  • Really enjoyed the class
  • Well organized & sequenced sessions. Could possibly add a session on FEM approach used (beam elements)
  • For Malcolm's presentations if some of the information are in the old format, you can download PDF program (free program). If you can print, you can use this program to convert anything into PDF.
  • Great amazing time spent talking on rotordynamics


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Comments on group dinner, restaurant, transportation:

  • Please include more pepsi products in the snacks.
  • Good food (I prefere to eat what a particular region is good at); transportation not all that necessary; put hotel group rate on course website to prevent default to company "preferred" hotels
  • Food was very good. I would have liked a choice of side dishes with the main course.
  • Excellent
  • Couldnít get hotel to answer phone when trying to make room reservation. After 3 days of this, decided to stay elsewhere.
  • Hotel was great. Restaurant was terrific, but a little slow.
  • Meeting room was very comfortable, hotel ws good. Location with lunch options at easy walking distance was excellent.
  • Excellent accomodations
  • Yummy. Hate the hotel though.
  • Hotel group reservation was communicated a bit late, already made arrangements
  • Room conditioner air too low temperature
  • Very good!