algorithmic modeling for Rhino
Karamba3D is an interactive, parametric finite element program. It lets you analyze the response of 3-dimensional beam and shell structures under arbitrary loads.
Karamba3D is being developed by Clemens Preisinger in cooperation with Bollinger und Grohmann ZTGmbH in Vienna.
Download a free trial now! Licenses for educational or commercial purposes can be purchased at www.karamba3d.com/buy.
downloads, manual:
https://manual.karamba3d.com/ or
www.food4rhino.com/app/karamba3d
examples (for Karamba3D 1.3.2):
release notes:
www.grasshopper3d.com/group/karamba3d/page/new-features-and-bug-fixes
scripting guide & examples:
https://www.karamba3d.com/download/#manual
repository with unit tests:
https://github.com/karamba3d/K3D_tests
Here a beam structure based on stream-lines with bending moments:
More details, manual, examples and download ....
This grasshopper discussion forum is no longer maintained - please post all questions on the McNeel Forum. Thank you
Hello:I want to know how to make a program and analysis the structure of shell waffle welding with the steel plate.I want to create the load for the steel plate(6 mm thickness) welding with the steel…Continue
Tags: Karamba
Started by ma qingsong. Last reply by Terry Austin Mar 20.
Hello. I have a problem in defining 3D Objects in Karamba. What I am trying to do, is that I have 3D scanned a few Irregular stones. So I have their 3D meshes in grasshopper. Then I am trying to…Continue
Tags: #irregular_object, #stones, #structural_analysis, #Karamba3D
Started by Amir Arsalan Tahouni. Last reply by Hison Feb 28.
In our sonic odyssey, selecting the right audio system becomes paramount. It's not merely about amplifying sound; it's about curating an environment where every note, every chord, and every beat…Continue
Started by Alice Billson Feb 27.
In the vast landscape of shaving products available today, finding the perfect fit can feel like navigating a maze. From sleek razors to luxurious creams, the choices are endless. However, amidst…Continue
Started by Alice Billson Feb 27.
Comment
Beams with bending switched off transmit normal force only. A node that connects to such elements has three degrees of freedom. In case of a planar truss add out of plane supports at all nodes (see also subsection 'Bending stiffness' of section 'How to change beam properties' in the karamba manual).
Having some trouble getting a pinned truss to perform. It works if I allow the beams to bend but when its pin jointed it doesn't like it. Any ideas?
Is it because its trying to be pin jointed at the roller and pin supports? If so how do I remove that?
Here is some WIP to share:
Portal Frame Model w/ Galapgos
Deflections are not right at the moment but will sort them out tomorrow. Pretty happy with the models behaviour.
Any update on when the learning examples will be available? I feel like I just cant set up my modules right.
What type of accuracy or units do people work in for their Rhino file when they work with karamba?
Ok here are the modules I have used to verify.
I just built the same model in SG:
30m Cantilever
Incaste
2kN point Load at end
And drew the section in the section creator based on the Chinese steel manuals (S235).
Hi Josh,
Thanks for the confidence, but I would certainly double check anything computed by Egret (I haven't had the time or opportunity I'd like to progress and validate it). I did quickly set up your verification model, the file can be downloaded here:
http://www.grasshopper3d.com/group/geometrygym/forum/attachment/dow...
I would suggest updating Egret from http://www.geometrygym.com/downloads , if you do, you should also see a deformation of 74.844504 (my gh definition assumes mm rhino document units). If you want to send me the spacegass model, I'll take a look at it for you.
Karamba uses a Young's Modulus of 21000[kN/cm2] and by default the thickness is 1/30 of the diameter of the tube. For D=100mm this results in t=3.33333 (etc.).
If you set both values according to the hand-calculation below you get the exact result of 74.844504m.
Haha good timing Luke!
I am writing a paper on Parametric structural analysis and just ran through all my analysers to see where I went wrong. I have it pretty much the same.
Example - CHS 100mm x 4mm
Deflection Calcs:
Manual - 64.6m
SG - 60.6m
Karamba - 61.5
Egret - 74.3
Now I am CERTAIN Egret is a result of a bug (I sincerely doubt Jon has made an error and it has been playing up on my computer probably because its full of shit).
I ran another model at 50mm depth of CHS to see if they maintain similar ratios. They do. I wanted to check that I could use Karamba and Egret for Galapagos modelling, so they are both pretty good.
Thank you for the check, its good to have a second set of eyes on problems like this.
Welcome to
Grasshopper
© 2024 Created by Scott Davidson. Powered by
You need to be a member of Karamba3D to add comments!