Skip to main content

Subspace Mode Extraction Method@ANSYS

Submitted by L2020 on
ANSYS Subspace Mode Extraction

Hi
I've a question about the Subspace method as one of the mode extraction methods of ANSYS.I want to extract the first 100 modes of a system with more than 200 DOFs, 
I assigned "No. mode to extract" to 100.
but when I ran the analysis, ANSYS just calculated the first 75 modes of the system...
I checked out the Subspace options again and I saw "No. mode to extract" was assigned to 75!!!!, I don't know why this option has changed??!

any help is appreciated
Regards

 

Ying Li

Dear  Laleh,

Sometimes, the subspace method may not used for the large modes you want to track in ANSYS. Try the  Block Lanczos method, which could be used for the large modes tracking. 

Ying Li

Department of Engineering Mechanics Tsinghua University Beijing, 100084, P. R. CHINA

Mon, 12/17/2007 - 06:17 Permalink