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This grasshopper discussion forum is no longer maintained - please post all questions on the McNeel Forum.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’m trying to make scissor structure on grasshopper using karamba. When I want to define joints in assembly, it gives me an error. How can I define connection of the elements with revolute…Continue
Started by Atefeh Edy. Last reply by Ryyyker Oct 10.
Hello, I have a question about the principal stress direction analysis result from karamba.The first principal stress direction (PSD) is usually defined as the direction of the largest principal…Continue
Tags: direction, stress, principal
Started by X.Arthur.Ma. Last reply by Terry Austin Jul 24.
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.
Comment
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Ich stimme mit Ihnen überein.
Hello, I have a problem and couldn't find anything useful.
The problem is this:
1. There are 157 rigid body modes in the system. This means some parts can move freely without causing deformation.
Try to use the 'Eigen Modes'-component and activate the display of local coordinate axes: The first eigen-mode will be the rigid body motion.
If this does not help, check whether you have a pinned support directly attached to a hinge. A hinge introduces an extra node which may cause the problem.
When analyzing a flat shell structure one has to lock the rotation perpendicular to the plate in at least one node.
I saw that you recommended using "Connected Parts (Karamba3D)" or "Eigen Modes (Karamba3D), but it seems like I have only one branch on my list.
I hope20.12.3dmkaramba.gh you can help me with it:)
This plugin is developed by GeometryGym so please get in touch with them. Also, this forum is no longer maintained, so please post questions in the Rhino Forums.
Hey,
I'm trying to export karamba model to SAP but am aving some difficulties and have this error.
I've installed the ggkaramba from package manager. tried with all of them(karamba, ggSAP, ggkaramba) in older version still doesn't work. would much appreciate the help.
I can't see the ggSAP in karamba see below.
But it's visible in gg plugin,
Dear all, please use the McNeel Forum (see https://discourse.mcneel.com/c/grasshopper/karamba3d) to post your questions and not the comment wall.
-- Clemens
Hello, I am creating a parametric model of shell truss for evolutionary optimization. When applying Mesh Brep component on my model, the resulting mesh gets weirdly distorted and broken around the edges. Do you know what might be causing this issue? Here is my GH definition:5.Issue.gh
another questions about the initial strain load, from the cases provide, for example,the beam with initial strain load do not have shear force and bending monent. in my understand , pure axis force only is much more safe then shear force, bending moment, and axis force together(hope my understand is right)
not sure my understanding is right: this initial load is the results of axis-force we want it inside and a load affect.
my question is, 1. in reality projects where does this load come from? it is the results of load we want. then how to add this on?
2. if we can use initial strain load to replace other loads, then how to transfer other loads with initial load. for example the beam under gravity become an arch, but we want a pure axis force arch, no shear force, then how to transfer gravity G=10 equals initial strain load?
3 is there any case of projects use initial strain load help me understand?
hi, clements, thank you very much for your answer.
I learn this case about mesh load and have 3 questions
1. there are meshs and beam, but the mesh do not have material , only have load, what is that?
2. the mesh is not attached to beam, how to understand it?
in my understand the case is , for examble, mesh is floor , have dead load or live load, then under floor is attached beam, this floor and beam should have intersect part, then the load will transfer to the beam. but here, they are seperate.
3, the mesh load is z-direction, but it turns a x-direction affect on beam, why
pls help, i know you help alot already
keep safe from virus hope vienna is ok
jiaxing lu
Hi, Jiaxing,
the eigenmodes and eigenvalues result from the solution of the eigenvalue problem (see e.g. here) of the stiffnessmatrix S. The eigenmodes show in ascending order those deformation modes which the structure can take on most easily. The eigenvalues are the ratio between the internal forces and the corresponding eigenmode displacements.
The eigenvalues and eigenshapes as calculated in Karamba3D have nothing to do with stability or vibrations. For the buckling modes one has to solve the general eigenvalue problem which involves the stiffness matrix and the geometric stiffness matrix. For the vibtration modes it's the general eigenvalue problem involving the resultant stiffness and mass matrix.
-- Clemens
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