When nodes have been put on surface before mesh, the nodes do not cross the mesh

Pari_20321
Pari_20321 Altair Community Member
edited June 7 in Community Q&A

hi,

 

I'm new to HyperWorks and I noticed that when I put some nodes on a surface, the mesh does not cross them (see photo below). Eventually I see the results are not right because of this.

Can someone please help?


thank yo in advance.

 

image
image

 

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Answers

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited April 2022

    You need to add fixed points to the surface.

    You can do that by projecting the nodes as fixed points onto the surface.

    image

  • Ananthan
    Ananthan Altair Community Member
    edited June 3

    Hi Jason,

    Does it means we need to project the node on to surface before meshing? When I had projected I can see point on the surface but without mesh lines passing through.

    Thank you

     

  • Jason_Craanen
    Jason_Craanen
    Altair Employee
    edited June 3
    Ananthan said:

    Hi Jason,

    Does it means we need to project the node on to surface before meshing? When I had projected I can see point on the surface but without mesh lines passing through.

    Thank you

     

    You can project before or after meshing. But you need a fixed point on the surface.

    Before will create the mesh from scratch on the surface. After will remesh the surface once the fixed point has been imprinted.

  • Ananthan
    Ananthan Altair Community Member
    edited June 4

    Hi,

    In the model shown, the geometry is already meshed. However, as the required load points do not have nodes, I created the nodes above the surface, and they need to be projected. 

    image

    The nodes are projected with the imprint option onto the surface. Even though the fixed points are created, the mesh was not recreated through the fixed points as shown. (I is an imprint and N is a node)

    image

    Can you suggest, if is this the procedure to be done? Or do we need to remesh after this process? 

    Thank you.

  • Rajashri_Saha
    Rajashri_Saha
    Altair Employee
    edited June 5

    Hi Ananthan,

    May be you can try "Associate" option(see the below image) where you can associate the nodes to surface. Please try this and evaluate your result. Sometime if the surface is very large, there might be visualization issue even if the node is on the surface.

    image

    Thanks

    Rajashri

  • Ananthan
    Ananthan Altair Community Member
    edited June 7
    Rajashri Saha_20525 said:

    Hi Ananthan,

    May be you can try "Associate" option(see the below image) where you can associate the nodes to surface. Please try this and evaluate your result. Sometime if the surface is very large, there might be visualization issue even if the node is on the surface.

    image

    Thanks

    Rajashri

    Hi,

    Surface association for the nodes is not working in my case. However, I was able to use the imprint tool in the geometry tab as mentioned in the earlier post from 'Jason' to create points, and that was remeshing my geometry when I tried again. 

    Thank you all for your feedback

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