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Random Vibration Testing

Random Vibration Testing

Random Vibration Testing

(OP)
We are about to do some Random Vibration Testing in an external Lab, and have been asked about the "Sweep Rate" for the testing. I cannot see what "sweep rate" has to do with Random Vibration Testing. Have I missed something?

Thanks for any input.

RE: Random Vibration Testing

No, you are right. I suggest you switch to a different lab.

 

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: Random Vibration Testing

(OP)
Thanks Greg. Good to get a confirmation that I have not lost the grip completely.

RE: Random Vibration Testing

Some people will want to perform a sine sweep before and after a random vibe test.

The purpose for that is to see if you "changed" something as a result of the random vibe test.

Did you also request a sine sweep or sine vibe?

RE: Random Vibration Testing

Umm.  There is perhaps a sweep rate associated with random vibration testing.

I once flight-qualified a tungsten heater filament for a space booster launch.  The vib. tech and I joked that the test would likely have a high sweep rate - and the stress analyst who was also there to witness the test gave us a puzzled look and started to object.

Then I explained that we meant how often we'd have to sweep up the broken pieces...

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