I have an issue with the Groundchecking of NX Nastran Models. I had a problem with a model regarding failed Strain energy check. Thus, I made a simplified Model to check if the strain energy check would pass then. I set the threshhold value to 1E-3. The Model is just a single component (block) with a hexagonal mesh with no connection to any other component. A picture of the simplified model is attached.
But the rotational DOFs just wouldn't pass the check for G, N, F and A set:
RESULTS OF RIGID BODY CHECKS OF MATRIX KGG (G-SET) FOLLOW: PRINT RESULTS IN ALL SIX DIRECTIONS AGAINST THE LIMIT OF 1.000000E-03 DIRECTION STRAIN ENERGY PASS/FAIL --------- ------------- --------- 1 2.003697E-06 PASS 2 5.066729E-06 PASS 3 2.630707E-05 PASS 4 7.918223E-02 FAIL 5 2.311569E-02 FAIL 6 1.516146E-02 FAIL
Does anyone of you know how to avoid failed rotational modes? Are there any parameter settings I would have to define? I used the default parameters setting.