Karamba3D

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Comment by Llordella Patricio on October 7, 2014 at 1:27pm

8-10-14losa.gh

hello, I'm working on this model. I would like to know how to connect the slab with beams, so that the whole work as one element.

Thank you

Comment by Karamba3D on September 29, 2014 at 10:55pm

Dear Huax, did you try to evaluate the eigen-modes of your structure? The first eigen-mode shows how the structure moves as a rigid body in case it is kinematic.

Best, Clemens

P.S.: Would you mind opening a new discussion on the subject? It would be better readable for others.

Comment by Karamba3D on September 28, 2014 at 11:07pm

Dear Huax,

I tried out your file but could not reproduce the error. Du you use the latest version of Karamba?

Best, Clemens

Comment by Steve Lewis on September 27, 2014 at 6:47pm

Huax

Regarding your comment below.

This is why you need to understand the principles of structural engineering. You have an unstable structure. It's dangerous to just assume Karamba or any structural analysis algorithm is giving you correct answers. I suggest you look first at your support conditions, then your material, then your section sizes then your applied load. You should then also so some sanity checks by Doing some hand calculations using first principles of static structures

Comment by Felicity Stewart on August 13, 2014 at 4:58am

Thanks! I will make sure to direct any further queries to the discussion forum, but my many thanks for getting it working :)

Comment by jjsolly on August 13, 2014 at 1:32am

Hi Felicity...this would be better on the discussion forum than here. But it was because your vertical members weren't broken down, they were all one element. You needed to break them down to intersect with the horizontals. See attached for a method of doing this (disclaimer - there are probably slicker ways of doing the intersect). I believe the model runs now. grasshopper11_jjs.gh

Comment by Felicity Stewart on August 12, 2014 at 8:08pm

Hi All,

I am trying to create a parametric 3D framed structure, although am struggling with the error "singluar stiffness matrix: cannot solve static problem" at the analyze model stage. Any help would be greatly appreciated. Here is the GH file grasshopper%2011.gh.

Comment by Karamba3D on August 5, 2014 at 11:14am

Hi Robert,

the solver currently used in Karamba is a direct solver.

Did you check the memory usage when computing your model? If the machine runs out of physical memory it starts to use the hard disk which makes the solution process very slow. 

A PCG solver would be a good idea. Maybe I find a good one for the next release.

Best,

Clemens

Comment by Robert Naguschewski on August 5, 2014 at 1:14am

Hi karamba-team,

I couldn't find the exact solver type you are using for the global equation system, but I guess it's a direct solver since the computation time increases heavily when exceeding 30000 nodes on my PC. Do you plan to integrate an iterative solver like PCG or similar in the next releases that steps into place when the model gets larger? For my uses this would be a great asset on your already great program because in complex models I cannot reach a mesh-independent solution without killing my PC for many hours...

Thank you,

Robert

Comment by pablo on May 21, 2014 at 11:23am

Dear Clemens,

Could I enjoy that one-month trial license? I need to try beam joints components.

Thank you very much.

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