Andreas Koutras
Ansys Employee

Hello, the node set of the nodal rigid body needs to have mass (see *ELEMENT_MASS if these nodes are not attached to the mesh) such that the nodal rigid body has translational mass and rotational inertia. It also possible to manually specify the inertia properties of a CNRB using *CONSTRAINED_NODAL_RIGID_BODY_INERTIA.