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Frequency Response Deflection Magnitude Error

Question asked by Chris Renner on Feb 1, 2011
Latest reply on Mar 20, 2011 by Jerry Steiger
Hello,

 

I am running a basic frequency analysis to find first mode frequency and deflection magnitudes for a vibration table adapter plate. The plate contains a circular hole pattern to mate to the shaker's head and a hole pattern for mounting the UUT. I created fixed constraints along the bottom edge of the shaker head mounting holes, default meshed, and ran a sine sweep. My frequency magnitude is in the ballpark as verified from hand calculations but my resulting deflection magnitudes are huge (20 plus inches for an 18 x 18 in plate)!

 

A fellow mechanical engineer I work with ran the same simulation on his own PC and obtianed the same exact results. Am I missing a simple software setting?

 

Thanks,
Chris 

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