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Error in run

Hi all,

I had given run in optistruct for linear static analysis
but it shows like this -

*** WARNING # ###
In static load case 1 the compliance is negative or large 1.389270E+08. Optimization/buckling analysis cannot be performed due to possible rigid body mode.

what does this mean????
what is compliance???

Please guide me.

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Altair Forum User

Hi all,
I had given run in optistruct for linear static analysis
but it shows like this -
*** WARNING # ###
In static load case 1 the compliance is negative or large 1.389270E+08. Optimization/buckling analysis cannot be performed due to possible rigid body mode.
what does this mean????
what is compliance???
Please guide me.

In general, 'rigid body mode' occurs when your BC is not completed. Check your BC!

Altair Forum User

Hi VIj,

As Q.NGUYEN-DAI please check your constraints and loads. In addition please check for unit consistency.