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Analysing hollow structures with SnS
What caught my attention few months ago, is SnS inability to analyse hollow nurbs models.
And this probably is not a SnS issue, but Rhinoceros itself. By hollow I mean, for example: a sphere, with another smaller sphere inside of it. Rhinoceros simply neglects the inner sphere, and therefor this kind of model can not be considered as a hollow. Probably that is why the SnS also can not consider it as a hollow.
Has something changed with the introduction of the meshes into SnS analysis?
Is it possible now, to analyse hollow models? Thank you.
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Replies to This Discussion
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Permalink Reply by Michael Freytag on
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Yes, you can analyze hollow solids if they are represented using a single mesh with normals oriented to point away from the material.
An example:
Here we have 2 sphere meshes, both with outward pointing normals. The mesh backfaces are colored orange.
Use Rhino's Flip command to re-orient normals on the "interior" sphere:
Use Rhino's Join command to join the two meshes into one.
Run SnSMesh on the joined meshes.
Apply material, restraints and loads.
Click [GO!] to complete the simulation and View the results:
Is this helpful?
~M
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Permalink Reply by djordje on
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Thank you for such a quick reply Michael (I did not get the email notification on your reply, even though I am subscribed to following the topic?!)
What you showed me is a section view of a two spheroidal meshes (one inside of another)?
Because if it's not (if these are just half sphere shapes), then this can be done using the nurbs surfaces too. Right?
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Yes, two spherical meshes; one inside the other. Rhino's section plane is turned on so the interior is visible... that's the X-ed planar polygon you see in all the views. In the last view, Scan&Solve's section plane is turned on so the solid material between the two spherical surfaces is visible.
~Michael
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Thank you for the reply again.
I was not aware of the Rhino section plane command (is that in Rhino 5?) as I am still using the Rhino 4 version.I knew SnS had a section option, but not the Rhino.
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In the first three images use Rhino section plane (as you said).
Is that an additional plugin, or command within Rhino 5?
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It is a command in Rhino:
View > Clipping Plane
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