Hi Everyone,We have been facing a high-vibration issue in one of the equipment structure support.The machine is vibrating at a maximum vibration or 4.1 mm/s RMS but the attached structure vibrates at 70 mm/s RMS. To identify the natural frequency of the structure support we have performed the bump test. I have attached the results, I would like your expert opinion to validate if the bump test spectrum and waveform seem correct or if I have to reperform the test for better results.I really appreciate any help you can provide.
please attach a pic of the structure. Probably very easy fix.
In order to provide any meaningful results some additional information is required:
In addition to Alex's comments, I would also want to know how the structure is supported or suspended when you did the bump test. As Ron mentioned, a picture of the structure would be helpful. Looking at your results, there's still considerable energy after 1 sec, including the pretrigger.
This resolution leads me to believe that there are other peaks in here that aren't visible because the frequency resolution is too large.
That may change where the natural frequencies really are, compared to what's shown in your spectrum.
Another thing that stands out to me: the initial spike, the impact, in the time waveform is almost 12G's. That's quite a bit.
Typically, you don't need that much force to detect the natural frequencies. Unless this is a large piece of industrial equipment, a small impact hammer should do the trick.
Pictures of the test setup and some details on your measurements would be really helpful.
------------------------------Alex JablonskiOriginal Message:Sent: 08-18-2023 02:21From: Anonymous MemberSubject: BUMP TEST results ValidationThis message was posted by a user wishing to remain anonymous
I can assume that this a 2-pole machine?
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