Optimizing standard tube thickness

Valentin

Hello, I'm trying to optimize a tubular frame (PBEAML). I can only optimize inner and outter radius via discrete design values.

 

I would like to optimize the thickness or to choose standard tube dimensions to get the best results I could buy in real shops, as the results I get are always big outter radius tubes with small thickness (unavailable in any shop). How can I do this?

 

Thank you.

Adriano_Koga

i don't think is possible to have the exact real shop section.

You could try to create some dlink between these variables, or some design constraints.

 

If it is a DLINK, you can say for example: 

D1 = 0.5*D2

 

If you rather create a DCONSTR, then:

create some equation (DEQUATION) and assign to your D1, D2, ...

equation F(D1,D2)=(D1 - D2)   >> can be anything relating the arguments D1, D2,. ....

create a DRESP2 (function) response, and assign to the above equation and choose your design variables D1, D2, ... in the same order as in the equation

create a DCONSTR, and say, for example:   equation_value <= 5.0