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  • Autodesk Robot Structural Analysis

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    Active Contributor
    Posts: 40
    Registered: ‎04-12-2012
    Accepted Solution

    Mode shape vectors

    340 Views, 11 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: 476
    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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    Active Contributor
    Posts: 40
    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: 2,773
    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
    Support Specialist
    Product Support
    Autodesk, Inc.

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    New Member
    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
    Posts: 2,543
    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
    Product Support
    Autodesk, Inc.
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    New Member
    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
    Posts: 2,543
    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
    Product Support
    Autodesk, Inc.
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    Active Contributor
    Posts: 47
    Registered: ‎01-11-2013

    Re: Mode shape vectors

    01-11-2013 05:33 AM in reply to: RG_Adsk

    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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    Active Contributor
    Posts: 47
    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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