Autodesk Robot Structural Analysis
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Mode shape vectors
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Hi to all,
How do you present mode shape vectors from each mode after performing modal analysis?
I would like to compare the mode shape vectors from numerical analysis with experimental analysis and establish the Modal Assurance Criterion (MAC).
Solved! Go to Solution.
Re: Mode shape vectors
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Do you mean the mode shape diagram?
Or a numerical representation?
Re: Mode shape vectors
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Numerical representation with values.
Re: Mode shape vectors
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Press the RMB on the table with results of modal analysis and select table columns. Switch to the Eigenvectors tab.
If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

Artur Kosakowski
Support Specialist
Product Support
Autodesk, Inc.
Re: Mode shape vectors
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i didnt undesrstand what is RMB .in modalanalysis environment i am getting only frequency results. i cant see any table. i need to have mode shape vectors .kindly help me with this
Re: Mode shape vectors
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RMB - right mouse button
Click on table using right mouse button then select Columns....

Rafal Gaweda
Product Support
Autodesk, Inc.
Re: Mode shape vectors
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i am working in autodesk inventor for modal analysis.i got first 10 modes.but i need to have mode shape vectors to compare with experimental results.i am attaching image of my result.please suggest looking at the figure.
Re: Mode shape vectors
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This is Robot forum, not Inventor.
Inventor http://forums.autodesk.com/t5/Autodesk-Inventor/bd

Rafal Gaweda
Product Support
Autodesk, Inc.
Re: Mode shape vectors
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To vertify my structure i have used matlab and plottet the eigenvectors. I am trying to compare the results from robot with the results from matlab. is there a smart way to get the eigenvectors ou from robott.. all i seem to get are -0 +0 and 1 -1 ?
Re: Mode shape vectors
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I was also wondering if Robot take into acount crackling of the concrete by code reduction factors for shear and flexular deformation when preforming a modal analysis?



