How to apply this boundary condition

1

Hey All,

I want to perform a modal analysis in Prepomax.
I want to apply a boundary condition that I come across.
This is how the problem definition is:

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I want to create a rigid body element that connects all the inner nodes of a hole.
This rigid body element should be attached to one end of a spring with translational stiffness 1N/mm and rotational stiffness of 1N/mm, while the other end of the spring is fully constrained in all 6 DOF’s. Couldd you help me solve this problem.

Thanks
Anoop

2

PrePoMax has point spring constraint. Those are node to ground springs so you select one node (reference point of a rigid body constraint in this case) while the other end is assumed to be grounded (fixed).

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