AnsweredAssumed Answered

Incorrect units on random vibration base excitation input curve?

Question asked by Stephen Blyskal on May 2, 2013
Latest reply on May 13, 2013 by Jared Conway

I'm running a random vibration analysis and noticed that the units on the base excitation input graph don't appear to be correct.  I'm using SW2013 SP0.0 with Simulation Premium.  I created a uniform base excitation, chose Acceleration, changed the units to g^2/Hz and entered a scaling value of 1 in the right direction.  Then I input a curve (the MIL-STD-810 minimum integrity curve) manually.  When I click on "View" to see the input graph to make sure I put in the right numbers, it comes up with units of "Acceleration (g)" on the dependent axis instead of the correct "PSD (g^2/Hz)".  I don't remember this being an issue in any previous versions of SW and when I run my analysis, it returns results that appear far less then I think they should, which has me very worried.


Can anyone confirm that the units are or are not correct when inputing a curve in random vibe?