Rigid bodies

Grasshopper Karamba3D
1

I’m having an issue when trying to integrate the truss I have drawn into the shell model. this error is occurring:

  1. There are 6 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 don’t know how to resolve it.

DOme with pattern.5.gh (88.3 KB)

2

Hi, make sure to flatten your supports as you have multiple models.

Also using the eigenmodes component you can see that parts of your model are not supported/connected properly

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