Comments on: Measurement And Analysis Of Torsional Vibration

By: Javier Remigio

Javier Remigio — Fri, 23 Jul 2010 19:11:48 +0000

Dear sirs, I am very interested in monitoring torsional vibrations in a vertical mill for a cement industrie. This monitoring must be a permanent monitoring, and I have though to use strain gauges to carry out torsional deformations and to use telemetrie to acquire this type of signals. Could it be your system adecquate as an option for this application? Please answer me privately to my e-mail. Thank you very much in advance.

By: Chris Mason

Chris Mason — Wed, 12 May 2010 07:58:24 +0000

Hi John

Thanks for the comment. That is the sort of real-world information that can prove invaluable to the right person at the right time. And it’s one of the reasons we put time and effort into the Noise & Vibration Blog!

By: John Mills

John Mills — Wed, 12 May 2010 04:57:15 +0000

On the subject of using angular measurments on a 2000 HP Waukesha Gasious fired cogeneration engine.A high displacement by a connecting rod was found to have been occuring within the burn angle.I found this to be attributed to high Intake Manifold Pressure as a result of the turbocharger control managment system attempting to compensate for lower than required BTU/SCF on digester gas.This can result in connecting rods being tossed through the crankcase if left unchecked.Just passing along an experience with angular measurements relative to an Internal Combustion Engine Cycle.

By: Jasmin Engelhardt

Jasmin Engelhardt — Fri, 09 Oct 2009 09:56:39 +0000

Hello Mr. Lincoln,

I read about your article. I am currently doing a project, on the business & marketing side, on torsional vibration analysis. I really have a very limited knowledge on it so I want to know where can I use torsional vibration analysis apart from Motors and gearboxes. It is said that it can be used to any machine that rotates, could you perhaps provide me an example of other possible machine?

Best Regards,

Jasmin

By: yane

yane — Mon, 05 Oct 2009 13:56:45 +0000

I would like to invite you if u have any videos of your equipment to contact me and post free to my Machines Video blog

http://machinesvideo.blogspot.com

thanks!

By: Ademar

Ademar — Fri, 25 Sep 2009 21:05:30 +0000

Hello James,

I am looking for a software to perform torsional vibration analysis of a mass elastic system ( engine + coupling elastic + pump). Does your software do such calculation?

Thanks,

Ademar.

By: James Wren

James Wren — Tue, 30 Jun 2009 11:22:25 +0000

Hello Arkadiy,

Thank you for asking a question.
Your application is very interesting but it is outside of the scope of this article. We will contact you directly to discuss in more detail.

By: Arkadiy

Arkadiy — Sun, 28 Jun 2009 16:54:51 +0000

We are going to repower a Tug boat and looking for Torsional Vibration Analysis for new C18 engine with old trans line. Would you offer your software for that kind of calculation?

Thank you in advanse,
Arkadiy

By: Ivo Dabelic

Ivo Dabelic — Fri, 24 Apr 2009 20:53:41 +0000

I red a published paper (some time ago) by Scientific Atlanta in which they were ademant about the run out compensation especialy when, for example, the readings are taken from large Diesel engine flywheel starting gear due to the “big” diameter? The signal was acquired from permanently instaled magnetic probe used for RPM tacho….

By: Adrian Lincoln

Adrian Lincoln — Fri, 24 Apr 2009 08:59:04 +0000

We would not expect to find (first order) runout in torsional analysis when using conventional tachometer instrumentation (such as shaft encoders or hall-effect probes) because they only sense angular motion not radial motion.

Adrian

By: Ivo Dabelic

Ivo Dabelic — Wed, 22 Apr 2009 17:22:55 +0000

I am interested to find out how do you account for Gear mechanical runout during the torsional analysis? As you know mechanical runout will show as first torsional order (1X)

Thank you