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ketan

Optistruct HGEFFMASS

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Hello,

 

In optisruct modal analysis after defining output->HGEFMASS .

it generate *.mass file output which gives us result plot modal eff mass(%) vs freq.

 

can you please tell how modal eff mass (%) file (*.mass) generated from modal eff mass.?

 

Thanks in advance

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Thanks for inputs Rahul..

 

i agreed .out write modal participation factor/ratio and modal eff mass/fraction according to PARAM equations.

 

i would like to know equation for modal eff mass percentage written in *.mass file.

 

Please revert.

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Hi Ketan,


 

Meff mass is a ratio of coefficient vector square and normalized mass. How Coefficient vector is calculated is another story :) 

 

I would suggest you refer literature or textbooks for the same.

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