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reduce degree's of freedom

Reduce dof's in FEM

Submitted by SivaSrinivasKolukula on
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reduce degree's of freedom

Hi 

  I have MDOF equation:

                MX"+CX'+KX = F(t).

 Say the order of each matrix is  nXn. I want to reduce the order of the matrices. 

I will find the eigen vectors and get modal vectors matrix phi. I will pick some dominating frequencies say around 24 modes.

then reducedM = phi'*M*phi.

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