Problem of size optimization's desvar
Altair EmployeeI want to ask at this time I do the size optimization
but at the shell property, I defined the T(thickness)=0.8mm
and at the size panel I need to defined the initial value, lower bound and upper bound
I want to ask at here initial value and property thickness are different
so which is the original thickness of my model?
and if my lower bound is 0.1, so it means my model's thickness the lowest is 0.1 mm?
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Altair EmployeeHi,
I left it default (or maybe forgot to update) /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>
Altair Employee
Ok Really thanks to you
so at the future I just set it yo -1 and 1
very thanks to you !
Altair EmployeeHi,
For example, you have an optimization problem such as min(max(stresses)) and you also want to keep the stress value smaller than 200MPa. Then you can define 200 as your reference number instead of 1. If you don’t have a bound on the response, then you can simply keep it as 1.
If you have a setup as min(max(displacement)) and the displacements are negative and you would like to normalize the multi-responses with their bounds, then you will need to input the negative value (negative bound) as the reference value. It totally depends on the bounds.
Altair Employee
But at here I do the stress constrain and I set pos=1
it means the stress will under 1MPa?
At the result it stress is over
Altair EmployeeNo,
The solver will minimize the maximum of the response. Please go through the document I shared earlier which explains how reference values are used.
Altair Employee
I got it, you said the value if we set 200 is the stress constraint 200 MPa.
And if I set 1 means I didn't have any constraint at my response.
@Prakash Pagadala I got it ! really thanks
but why we set value at neg = -1 and pos = 1
why no there is be any value