Kangaroo

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THIS FORUM IS NO LONGER ACTIVE. PLEASE POST ANY NEW QUESTIONS OR DISCUSSION ON:

https://discourse.mcneel.com/c/grasshopper/kangaroo

The discussions here are preserved for reference, but new questions posted here are likely to go unanswered.

Kangaroo is a Live Physics engine for interactive simulation, optimization and form-finding directly within Grasshopper.

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Structure joints

by Ammar Kalo

Dec 7, 2013

Hi all,

I've been trying to simulate a structure for a test model that I built using wood. 

I used a modified version of the 'stress colors' definition on this page ( http://www.grasshopper3d.com/group/kangaroo/forum/topics/getting-sp... )

While its not the most optimized structure, the physical model does stand perfectly fine (takes up to 500 pounds of load as well) especially at the scale its built at, yet I cant seem to get it to work in kangaroo even through the stiffness setting is pretty high. Is there something need do to change the type of joints between the members. The structure is only anchored at the bottom. Any help would be greatly appreciated!

  • up

    David Stasiuk

    Kangaroo isn't set up to let you define moment connections at joints...while you can constrain movement along different axes, your joints will otherwise operate as pins. This means that it will work fine for any fully triangulated structure (as in the link you provided), but it doesn't look like you have that here. I'd suggest using a finite element solver like Millipede or Karamba.

    1

    Dec 7, 2013