Re: X-force Inventor Nastran 2006 Crack
Hien Mondesir
This highlights the tricky part of using coincident node CBUSH elements. When a CID is used to define the nastran CBUSH element orientation, the load is always computed as Ke tension based on UGB-UGA. In our case, the element was defined from the node GA on the bottom plate to the node GB on the vertical plate.
Note how the CID check box is unchecked and the rotational stiffness is now moved to the DOF 5 field (this is because the DOF is is rotation about element Y, and element Y is now DOF 2 with respect to the element vector definition). Click on these links to learn more about: Spring elements in nastran and spring element forces.
This makes a lot more sense to me. X is always along the element connectivity axis, and we can see clearly that the tension and compressive loads. Element Y is along the long shear nastran CBUSH element orientation vector direction. And we have 30lb load along Y and Z (short transverse direction) of the elements. We can also see the induced moment due to the rotational stiffness about the element Y axis.
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