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#74859
-
07/15/20
05:36 AM
Modal Analysis - Natural Frequency Results query
shamaliabhavin
Member
Registered: 03/02/08
Posts: 71
Loc: India
Dear Dave,
I have query regarding the intermediate node break between supports in
CAESAR II
file for Continuous support span for modal analysis.
Is it mandatory to break the intermediate node between supports for accurate prediction of natural frequency in Continuous support span?
Regards,
Shamalia Bhavin
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#74860
-
07/15/20
06:13 AM
Re: Modal Analysis - Natural Frequency Results query
[
Re: shamaliabhavin
]
Richard Ay
Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
Mandatory - no. Good Practice - yes.
Run the model both ways and compare the frequencies and mode shapes.
_________________________
Regards,
Richard Ay
- Consultant
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#74864
-
07/15/20
09:12 PM
Re: Modal Analysis - Natural Frequency Results query
[
Re: Richard Ay
]
shamaliabhavin
Member
Registered: 03/02/08
Posts: 71
Loc: India
Dear Richard,
Thanks for your reply.
I have Run both the model for Modal analysis.
Result are different.
Natural Frequency is less when I break intermediate nodes.
Which one I need to follow.
Regards,
Shamalia Bhavin
Top
#74868
-
07/16/20
07:50 AM
Re: Modal Analysis - Natural Frequency Results query
[
Re: shamaliabhavin
]
Richard Ay
Member
Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
I would use the model with the finer mesh (more node points).
_________________________
Regards,
Richard Ay
- Consultant
Top
#74871
-
07/16/20
09:23 PM
Re: Modal Analysis - Natural Frequency Results query
[
Re: Richard Ay
]
shamaliabhavin
Member
Registered: 03/02/08
Posts: 71
Loc: India
Thanks for quick reply.
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