reduce vibration levels
reduce vibration levels
(OP)
what are the typical techniques to reduce the levels of random vibration (g_rms) passed to a DUT-device under testing?
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RE: reduce vibration levels
Makers of vibration isolators have extensive experience and can give more guidance when provided with sufficient details.
RE: reduce vibration levels
Is the test fixture too flexible/rigid ??
another day in paradise, or is paradise one day closer ?
RE: reduce vibration levels
TTFN (ta ta for now)
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RE: reduce vibration levels
Maybe I didnt ask with enough details:
I will have an interface structure in-between
was wondering if there is any typical method followed, like putting some rubbers or anything similar
so I want to design this interface structure to limit (and then verify by test) the vibration passed from the shaker to the DUT:
DUT
|
interface mounting
|
plate
|
Shaker
RE: reduce vibration levels
is this "interface" part of the design/installation ? or just part of the test set-up ?
if the latter, then I thin you've wrong to do this. The shaker should excite the unit as required.
Now if you're "kludging" your test and using a shaker that would over-test the unit, and want to reduce the power/frequency of the shaker to match what you want to apply in the test ... well, that's different. I might use something like an oil bath ... some way to siphon off some of the shaker energy.
another day in paradise, or is paradise one day closer ?
RE: reduce vibration levels
I think you have that backwards; you want 100% transmissibility in the fixture, that means it needs to be, practically speaking, infinitely stiff, i.e., there will be ZERO, or close to zero, resonances within the test band, and there will be no attenuation, either. That means, no rubber baby buggy bumpers.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: reduce vibration levels
It's also possible that the vibration levels you have been given to perform testing to represent a worst-case of a worst case scenario, i.e. the rocket guys took some spectrum data and boosted the levels by 1.5x or 3x "to be conservative", and the next person did the same, and so on. Ask if you can "notch" the spectrum in a frequency band centered around your resonance.
RE: reduce vibration levels
https://www.mcmaster.com