Using standard deviation operator in optimization objective function

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Hello.

I want to define standard deviation of temperature distribution of the load after 60 seconds of heating **( time at 60s) ** as objective function in shape optimization module.

My study is consists of two steps, frequency domain and time dependent.

I made integration operation of the domain of the load in non local coupling section, intop2 Then i could get standard deviation at specific time (60s) by defining Derived values - global evaluation using stddev() built in operator, stddev('comp1.intop2',T).

However, I have no idea how to define objective function using stddev('comp1.intop2',T). stddev() does not work here. Also, I am struggling how to define standard deviation of temperature at specific time as objective function.

I appreciate any advice.


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