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rotordynamics with ansys

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arz8319109

Mechanical
Jul 20, 2010
7
Dear all,
I want to do a run- up analysis for a rotor in ansys. The rotational speed change from 0 to 5000 rpm
In ansys help is explained:
nlgeom,on !! so that the gyroscopic matrix is updated
But because my model has Combin214 element, the nlgeom make error and solve dont run.
when I remove combin214, I dont get error.
I changed combin214 with matrix 27 but same problem.
In an example in ansys is used combin14. but my model is 2-D axisymmetric analysis and I think combin14 in not good element for modeling bearings.
How can I solve this problem?
 
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