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  1. brianpaul

    Test time reduction - Ask any vibration guy in the world

    Okay, I will request forgiveness for the vagueness of my question. The answer I was told to expect was "Miner's Rule". We do spectral exageration as IRstuff indicated via (newPSD^4)*newTime = (oldPSD^4)*oldTime or someother exponent. However how is that arrived at. GregLocock headed...
  2. brianpaul

    Test time reduction - Ask any vibration guy in the world

    IRstuff, Thanks for your response. What you've listed is the method for determining the new spectrum to acheive the new test time. What I am looking for is people to identify "the underlying premise of test time reduction through amplitude exaggeration"?
  3. brianpaul

    Test time reduction - Ask any vibration guy in the world

    electricpete, Sorry for my lack of clarity. The test time refered to is shaker table test time. Curiously I think your rule of thumb for doubling the stress S amplitude to half the N cycles is interesting. As a mechanical I would have applied a different ratio.
  4. brianpaul

    Test time reduction - Ask any vibration guy in the world

    I have a question. I'll keep it brief to not lead the response. However I would like to learn some of the background to the response. Here is the question (please fill in the blank): If you ask any vibration guy in the world the underlying premise of test time reduction through amplitude...

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