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Shivani Tiwari

Orphan Nodes

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Goodmorning All

 

Preprocessor/Post Processor - Hypermesh/ HYPERVIEW

 

Solver - msc nastran

 

I am doing normal mode analysis of exhaust system that is constrained in all DOF. I have cleared all preserved node. But still in HYPERVIEW when I am seeing the output orphan Nodes are coming. 

 

As I have already told that my system is constrained still rigid modes are coming.

 

Can anyone help me to resolve orphan Nodes error.

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Hello,

 

Normally Hypermesh converts directional vectors into orientation nodes. This is not a problem.
In Hyperview these then appear as "Orphan Nodes". You can just turn it off.

Orphan Nodes have nothing to do with rigid modes. Normally these should be "auto-constraint" in any case.

 

Icon "Entity Attributes"-> select "Orphan-Grids-> Display: Off

 

Best Regards,

Mario

 

image.png.a52b048f3a182914eca4cb0ac5f62cc9.png

 

 

 

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5 hours ago, Mario said:

Hello,

 

Normally Hypermesh converts directional vectors into orientation nodes. This is not a problem.
In Hyperview these then appear as "Orphan Nodes". You can just turn it off.

Orphan Nodes have nothing to do with rigid modes. Normally these should be "auto-constraint" in any case.

 

Icon "Entity Attributes"-> select "Orphan-Grids-> Display: Off

 

Best Regards,

Mario

 

image.png.a52b048f3a182914eca4cb0ac5f62cc9.png

 

 

 

Sir I tried with autospec yes but still facing the same problem. When I open the model in hyperview (animation), i found that the constraints at each hanger (dof 1-6) are not working. 

 

But when I see it in hypermesh DOFs are correctly defined. 

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