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What´s the best way to model a large hole in a dome. Picture attached
Rafael Medeiros
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Artur Kosakowski
Thx Artur, It´s a lot easier and faster than the way I used. But ,Is there a way to get a nice mesh closer to center of the Dome? I´m aiming at a 50cm mesh ,and Using the revolve , extrude and combine methods I´m getting triangular finite elements with 3 cm base and 50cm height at the top of the dome , no matter the meshing options I tried. Is it possible to get something like this using this method? See attached picture
Rafael Medeiros
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I can't think of anything easy. You may try to create a dome without the top part as as an revolved arch and then create a circular (flat) panel at the level of the top of the arch. After meshing it you may move the nodes of the circular panel up to their final locations.
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Artur Kosakowski
Another solution may be that you revolve two (or more) arches. The top one(s) can be then divided into parts of smaller length(s).
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Artur Kosakowski
That´s what i did but for the whole structure. I created a large circular panel with the large hole projection in XY plane. Then I meshed it the way I wanted . After that I got the node coordinates and moved them to the right Z position using excel .Dome is linear ,with variable thickness, to a certain height and then is a circular arc with constant thickness. So there were 2 regions with different coordinate Z formulas.
This could be done some years ago in the old Robot Millenium days using that fx function from the (separate sold) ACIS module. Is there something similar to that nowadays?
Rafael
PS: T. Sautier , revolve-combine mesh model ,as Artur sugested, is attached. Rename to .rar
Rafael Medeiros
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regarding the picture,You draw the sphere in autocad and then import it to Robot ,Or this was entirely done inside robot?
I tried the sphere option in Robot and it draws a nice sphere but it seems similar to a revolving arc. I can´t mesh it any other way and also , the sphere also creates a half circular panel inside the sphere!!
Rafael Medeiros
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here it is! It seems I would get a lot of "incoherent mesh" warnings!!
🙂
Don´t know why it creates a half circular mesh inside the sphere
I´ll try the solid mesh!
,thx
Rafael Medeiros
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