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Robot Structural Analysis

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Distinguished Contributor
146 Posts
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Registered: ‎11-16-2011

which mesh size to obtain correct results reducing moments above supports?

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10-24-2013 07:28 AM

Did some models, mesh was with a size of

1. 1/2 of coloumn width

2. same as coloumn width

3. 1,5 of a coloumn width.

All models gives defferent results. Which one i can pick for correct results?

Valued Mentor
653 Posts
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Registered: ‎09-07-2011

Re: which mesh size to obtain correct results reducing moments above supports?

10-24-2013 04:17 PM in reply to: Jummybear

This is an engineering judgement and not really Robot related?

 

But, the accuracy of the result obviously increases with finer mesh.  It's a balance between accuracy and calculation time. 

*Expert Elite*
461 Posts
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Registered: ‎12-14-2012

Re: which mesh size to obtain correct results reducing moments above supports?

10-29-2013 06:34 AM in reply to: tony.ridley

I was about to add : 

"You can also define an realistic area for the support -> avoid peaks of moment.

Go into the nodes properties"

 

But actually it doesn'st take into account the dimensions of the support in the results .. maybe it is only in the RC design modules ..

 

You will have to follow tony's instructions ...

 

Product Support
5,253 Posts
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Registered: ‎12-17-2010

Re: which mesh size to obtain correct results reducing moments above supports?

10-29-2013 07:24 AM in reply to: t.sautier

But actually it doesn'st take into account the dimensions of the support in the results .. 

reduction on maps.PNG



Artur Kosakowski
Distinguished Contributor
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Registered: ‎11-16-2011

Re: which mesh size to obtain correct results reducing moments above supports?

10-30-2013 02:27 AM in reply to: tony.ridley

Tony, if we look to slab span moments than it is. For supports it doesnt work. The smallest mesh is, the closest results you will get. For example, if you have support column 0,5x0,5m and mesh size 0,1x0,1 you will get very close results after "reducing moments above supports" to the peak ones. But for the reinforsment calculation they are too big.

*Expert Elite*
461 Posts
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Registered: ‎12-14-2012

Re: which mesh size to obtain correct results reducing moments above supports?

10-31-2013 10:18 AM in reply to: Artur.Kosakowski
Thx, forgot that! :smileyhappy: