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Robot Structural Analysis

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Active Member
jabre
Posts: 6
Registered: ‎08-30-2011

instability errors

353 Views, 3 Replies
08-30-2011 06:10 AM

Hello

 

I could not find any useful information about instability errors (1,2,3)

I am currently designing this simple structure but when I calcualte it repeatedly shows Instability errors in nodes 21 and 16 in direction RY. could not figure out how to deal with this error, so looking for some help here!  I used the structure form library and released moments in the diagonal bars for a structure type 2d frame is being used.

 

Thank you in advance!

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Jakub.Brozonowicz
Posts: 317
Registered: ‎12-13-2010

Re: instability errors

08-30-2011 07:01 AM in reply to: jabre

What is exactly structure type Geometry > Structure type chosen in such case?

Is it possible to share this model to do some check?



Jakub Brożonowicz
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Active Member
jabre
Posts: 6
Registered: ‎08-30-2011

Re: instability errors

08-30-2011 11:15 PM in reply to: Jakub.Brozonowicz

I found that i had a RY release in the upper chord, now when I deleted it, it's ok! The structure type btw was 2D frame.

 

Thanks

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Jakub.Brozonowicz
Posts: 317
Registered: ‎12-13-2010

Re: instability errors

08-31-2011 12:40 AM in reply to: jabre

Fine if it works OK now.

But I still feel surprised that spatial structure was build in 2D mode.



Jakub Brożonowicz
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