Optimization of a variable shell cross section

Hello,

I have a problem about the optimization of a shell. I would like to create a variable cross section (from 40 cm at the base to 30 cm at the top) of the shell depending on the max displacement. I tried to use the optimizer but as suggested in the examples, but the result is a unique section.

Second question: I also tried to analyse the tensile stresses of the surface, but I don't know how to find the numeric results associated to the lines (red and blu) in KPa or KN/m2.

Thanks,

Carlotta

Attachments:

Variable shell cross section.3dm, 848 KB
Variable shell cross section.gh, 32 KB

Replies to This Discussion

Permalink Reply by Karamba3D on November 30, 2017 at 1:12pm

Hello Carlotta,

in your example the smallest cross section was already sufficient for the given load (see attached definition).

In order to find the numeric values of the stresses you could use the 'ShellVecResults'-component and use the list of output points 'P' to find the results closest to the position where you want to know the stress values.

Best,

Clemens

Attachments:

Variableshellcrosssection_cp.gh, 35 KB

Permalink Reply by Carlotta Olivari on December 1, 2017 at 3:22am

Thank you Clemens,
I understood the problem of the cross section.
About the stresses on the shell: I would like to understand if the tensile stresses on the shell are in between a certain values (minimum 30 KPa, maximum 350 KPa). But I can't find the way to obtain numerical value from "shell vector results".

Attachments:

Variableshellcrosssection_cp.gh, 43 KB
Variable shell cross section.3dm, 970 KB

Permalink Reply by Karamba3D on December 4, 2017 at 1:34pm

Hello Charlotta,

the easiest way to check where the first principal stress is above a certain limit is to change the numeric range of the color display (see attached file).

The slider 'Layer of results' on the 'ShellView'-component lets you select where through the shellthickness you want to see the stresses (-1 corresponds to the lower, +1 to the uppper side of the shell as specified by the local coordinate system).

Best,

Clemens

Attachments: