When I do a prestressed modal analysis with frictionless contact between parts, the closed contact is not recognized in the modal run. Frequencies and mode shapes are calculated as if there were no contact, even though the contact status is closed at the end of the static structural analysis. Also, there is nothing in the documentation on how a modal interprets the frictionless contact status in a prestress modal run.
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This is a defect at 11.0SP1 (#67727). The workaround is to add in a command object with "EMATWRITE,YES". |
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