guyan reduction + modal assurance criterion

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

I want to compare the normal modes implied by a reduced representation with those implied by a full analysis. i have a cantilever beam fixed at one end meshed using 3 20-node hex elements. The variables at 24 equally spaced nodes are selected as masters and a guyan reduction is performed. The normal modes of the reduced system are produced and compared with the normal modes of the full system using the MAC.

 

1.how do i perform this in HM ? 

2. after performing guyan reduction will the natural frequencies differ or be same as the frequencies without guyan reduction ?

 

 



 






 



 

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