3d scanner geometry treatment

[jackr84]

hi, I'm doing a study on a muffler through cfd. The geometry has been obtained through 3d scanners with structured light. the surface is composed of many triangular surfaces. in a few words I have to combine all the surfaces, create a volume and subdivide this volume into 3 parts and convert it into parasolid.how do I have to proceed?i attachment I put the drawing file.

thank you, if you want more explanations let me know

jacomo

 

[mariuss.r]

hi, I'm doing a study on a muffler through cfd. The geometry has been obtained through 3d scanners with structured light. the surface is composed of many triangular surfaces. in a few words I have to combine all the surfaces, create a volume and subdivide this volume into 3 parts and convert it into parasolid.how do I have to proceed?i attachment I put the drawing file.

thank you, if you want more explanations let me know

jacomo

Hello jacomo

Maybe a few lines of presentation would be appreciated, as well as better explain what kind of help you expect from us.
I say that because it's clear that most of the work you've done already.
in the file there are no triangles, well, cloud surfaces.
The file you posted is already parasolid.

The marble surfaces do not have discrepancies on the edges, so just give the _join command and get a single polysurface.
to obtain a solid it is enough to stop the two circular holes at the two ends of the tubes.
the _cap command (solid menu) will allow you to stop one of the two ends.
the other extremity(which is not perfectly flat) you can close it with the _patch command (area menu)

at this point you have a solid that you can "slic" as you best believe with the _booleansplit command

 

[jackr84]

Sorry I didn't show up. I'm about to graduate in energy engineering. The work is about my thesis work, cfd study of a catalytic converter. geometry was acquired through a 3d scanner. the problem comes from the fact that the software I used to mesh the surface, gambit, is a little limited; for this I am using another software called numeca. the problem is that numeca law is the parasolid format and geometry must be characterized by volumes. my request for help is precisely this:
if I apply the join command to the surfaces and stop the holes get a volume?

 

[mariuss.r]

if I apply the join command to the surfaces and stop the holes get a volume?

certainly :smile: ...get a solid, you can calculate the volume. ( command _volume)

a solid is nothing but a set of surfaces or polysuperfici welded together without open edges.

For example... a cube is a solid consisting of 6 flat surfaces welded together without open edges.

 

[jackr84]

I joined the surfaces and stopped the holes!!! Now the problem is that there is no booleansplit command. I'm checking, but there's nowhere

 

[mariuss.r]

I joined the surfaces and stopped the holes!!! Now the problem is that there is no booleansplit command. I'm checking, but there's nowhere

It's a rhino v4 command. if you have the Italian version of rhino you must precede the command the underscore character

_

cmq is the last command you find in the solid menu

 

[jackr84]

Sorry to stress you, but there's no command! I have the English version. If you can help me, I'd be very grateful. I'll attach the igs file with a figure where I'll show you the division I need to do. I have to divide the volume into 3 parts. cutting plans are positioned:
- the first cutting plan is distant -82.84 from the garden;
- the second floor of the cut is placed at 11,56 from the 0rigine;
if you be careful there are circular curves that highlight the position of the cuts. the planes must be parallel to each other and the most possible orthogonal to the direction of the flow.
If you can help me, I'd be very grateful.

 

[mariuss.r]

Sorry to stress you, but there's no command! I have the English version. or

It's obvious that you haven't updated the last service release, I suggest you do it.

Attached I put the famous marble divided into 3 parts... :smile:

 

[jackr84]

I saw the file, but I realized that the two floors do not cut the volume evenly. the volume length must be 94.4 mm, and the planes must be parallel. Unfortunately I don't have the updated version of rhino, because I used it at university. If you can try to fix it. Thank you.

 

[mariuss.r]

I saw the file, but I realized that the two floors do not cut the volume evenly. the volume length must be 94.4 mm, and the planes must be parallel. Unfortunately I don't have the updated version of rhino, because I used it at university. If you can try to fix it. Thank you.

Look at you wrong:

in the file that I attached there are also the two flat surfaces that I used to cut the pot in 3 parts.

turn on the "cutting plates" level and the 2 surfaces will appear.
The distance between them at every point is 94.40 mm, so they are parallel... :smile:

In any case, the _booleansplit command is not the only way to get 3 separate parts. well studied the _split command and the _join command.

The only difference is that _booleansplit does in a single passage what those two commands do in separate actions.