Hello 
I’m a student desperately trying to understand grasshopper 
I’ve been folowing a tutorial and trying to reproduce it.
But I’m stuck : when I connect any chosen points (as a parameter) to the ‘‘assemble model karamba’’ input, it says they’re ‘‘unconnected nodes in the model’’ … I don’t know what to do, I tried everything … I’m lost… :’(
I’m a beginner in grasshopper, so maybe it’ll sound obvious for some, so sorry in advance !
Thank you
That’s the message I get
- Solution exception:There are 4 unconnected nodes in the model:
node-ind:0: (-0.0379949560557119/0.0759899121114232/0)
node-ind:3: (7.94909233645248/0/-3.54225568086805)
node-ind:5: (13.8722993323367/0/-3.54225568086805)
node-ind:8: (21.8470997320342/0.0759899121114232/0)
Hi,
please post your definition or a screenshot so that we can try to help you with your problem
best,
Matthew
@matttam
I am getting the same error and it looks like it is from the mesh input.
sierpinskiAnalysis-3.gh (1.3 MB)
Hi,
as you have a very refined mesh, you need to make sure that the tolerance (LDist) in Karamba is reduced, otherwise points within this threshold will automatically be removed.
sierpinskiAnalysis-3-mt.gh (1.3 MB)
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riiight, great, thank you! @matttam
Why does the displacement go higher with a more refined mesh though?
Hi, this is a standard issue of mesh resolution in FE calculations. Please see Karamba - user problems - Grasshopper for more information.
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hi again,
any idea why this is happening? the resolution of the mesh is very high in case it might have anything to do with it. it is coming out of a brep and i am quadRemeshing the surface to avoid the weird subdivision after the meshBrep operation and analyse it eventually.
sierpinskiAnalysis-.gh (36.4 KB)
i think i managed the quadRemesh issue but now i am getting a rigid body error and i have no clue where is it coming from! i tried support points, load points LDist, i have also tried on different patterns and same story! I hope you help here.
Thank you @matttam
sierpinskiAnalysis-.gh (1.2 MB)
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Hi @abdullahyibra, when I open the script I do not have any rigid body modes, but a very high displacement. This is because you have only fixed the shell in one single support point. You can imagine in reality the shell will not be supported at one single point but rather within a specific region:
sierpinskiAnalysis-mt.gh (1.2 MB)
right, i see what you mean. but what could be the reason of this error? because even when i open your file i still have rigid body modes error! i also made a region of support points on both sides and still the same issue! @matttam
Did you make sure the material has been defined properly? In you first screenshot the total mass was 0 which means there is an error with some of the elements, cross sections or material. I am using the latest version 2.2.0 of karamba3d
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