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Robot Structural Analysis

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Valued Contributor
sergey.churilov
Posts: 59
Registered: ‎04-12-2012
Accepted Solution

Mode shape vectors

531 Views, 13 Replies
04-26-2012 03:29 AM

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).

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Valued Mentor
tony.ridley
Posts: 652
Registered: ‎09-07-2011

Re: Mode shape vectors

04-26-2012 03:38 AM in reply to: sergey.churilov

Do you mean the mode shape diagram?

 

Or a numerical representation?

 

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Valued Contributor
sergey.churilov
Posts: 59
Registered: ‎04-12-2012

Re: Mode shape vectors

04-26-2012 03:44 AM in reply to: tony.ridley

Numerical representation with values.

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Product Support
Artur.Kosakowski
Posts: 4,544
Registered: ‎12-17-2010

Re: Mode shape vectors

04-26-2012 04:00 AM in reply to: sergey.churilov

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
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New Member
murali3131
Posts: 2
Registered: ‎09-18-2012

Re: Mode shape vectors

09-18-2012 05:01 AM in reply to: sergey.churilov

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

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Product Support
Rafal.Gaweda
Posts: 4,935
Registered: ‎04-26-2010

Re: Mode shape vectors

09-18-2012 05:07 AM in reply to: murali3131

RMB - right mouse button

Click on table using  right mouse button then select Columns....



Rafal Gaweda
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New Member
murali3131
Posts: 2
Registered: ‎09-18-2012

Re: Mode shape vectors

09-18-2012 08:51 AM in reply to: sergey.churilov

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.

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Product Support
Rafal.Gaweda
Posts: 4,935
Registered: ‎04-26-2010

Re: Mode shape vectors

09-19-2012 12:29 AM in reply to: murali3131

This is Robot forum, not Inventor.

 

Inventor http://forums.autodesk.com/t5/Autodesk-Inventor/bd-p/78



Rafal Gaweda
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Valued Contributor
oyvinkle
Posts: 56
Registered: ‎01-11-2013

Re: Mode shape vectors

01-11-2013 05:33 AM in reply to: Rafal.Gaweda

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 ?  

 

 

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Valued Contributor
oyvinkle
Posts: 56
Registered: ‎01-11-2013

Re: Mode shape vectors

01-11-2013 05:39 AM in reply to: oyvinkle

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? 

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