frequency optimization

mesun_20785

I would like to kindly ask how do we perform

-sensitivity analysis in optistruct

-multiple frequency increasing ,or dealing wth multiple freq optimization problem like attached reference document since i am interested in first 3 mode.

-In litrature there are so many techniques in topology optimizaztion like MMA,Homogenization etc..

-also about checkboard

Wht is the default method used in Optistrcut?

Can anyone guide me to find some theortical information about optimization (topology) used in optististruct ?

frequency optimization theory used in Optistruct?

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Rahul Rajan_21763

Hi,

PFA tutorial for setting up an optimization problem on size. You can specify the frequency constraints as well and add a modal subcase for optimization.

Use this attached tutorial to set up a problem and for understanding. I have attached pdf for theoretical information about optistrcut.

For more information refer optistruct user guide and tutorials.

Regards

Rahul R

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mesun_20785

Hi thank you for your answer..Could you please tell about more about defining modal constraints.I hav ecompleted all the tutorials in hyperworks environment ( almost a bit forgotten some)

As far as i know i can define modal frequency maximization we can only define objection function for single frequency ( Mode I) is there any option like

objection max ( f1,f2,f3)

or you meant that we can give some constraints to some other frequencies like

f2>xx

f3>yy

while max(f1)

or some other possibilities..

right ?

thanks in advance.

Rahul Rajan_21763

Hi,

Use weighted frequency response to maximize multiple frequency.

Regards

Rahul R

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