Why is rotational inertia of MASS21 ignored in a static coriolis analysis at ANSYS 11.0?
I created a simple one element MASS21 model with all mass and rotary inertia values equal to 1
and it rotated it around x axis with wx =1000 and z axis with wz=10 in a static analysis using the
rotating reference frame (CORIOLIS,ON,,,OFF.)
The theoretical reaction moment must be MY= Ixx * wx * wz = 1 * 1000 * 10 = 10000
But ANSYS calculates a moment of 0.
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I checked with development and only the translational mass of mass21 is considered in a static coriolis analysis. In a transient analysis, like the one attached, the coriolis moment from the rotary inertia will be computed and the moment is correct. |
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