topic Robot problem modelling an elliptic shell structure in Robot Structural Analysis Forum

Robot problem modelling an elliptic shell structure

Anonymous — Tue, 30 Jul 2019 07:28:15 GMT

Hi, I am new modelling on Robot.

I have been trying to model an Elliptic shell structure of concrete, 6 cm thickness in Robot for my thesis project.
The front elliptical arc has a different shape that the back one, also I have an inclination at the bottom part.
I have tried to transfer the model from AutoCAD to Robot but I only get a series of dots and I cannot get the surface.
Do you guys have any idea how to do it?
Thanks
Jorge Vazquez

Re: Robot problem modelling an elliptic shell structure

Krzysztof_Wasik — Tue, 30 Jul 2019 09:17:31 GMT

Hi @Anonymous

I have recorded this type of structure creation procedure (see attached link).

Elliptic shell structure

Main steps presented in recording (predefined grids were used to control geometry)

bottom contour lines definition
arcs definition (arc discretization and bar creation options on)
arc grouping
grouped arcs deformation (to form elliptic shape)
groups exploding
panel definition (using list of object method)
panel mesh parameters definition (Coons method, user division definition)
panel thickness definition
unnecessary bars deleting
supports definition
calculation

If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

Re: Robot problem modelling an elliptic shell structure

Anonymous — Tue, 30 Jul 2019 13:31:50 GMT

Thank, you very much answer.

Here is the model I did with your solution.

Re: Robot problem modelling an elliptic shell structure

Krzysztof_Wasik — Tue, 30 Jul 2019 13:51:13 GMT

Hi @Anonymous

Thanks for sharing. Good luck with your project