Hello everyone,

I'm a M.Sc student in Civil Engineering and I'm currently working with FEM on LS-DYNA. As part of my research, I need to connect a nodal mass to each node of an elastic solid element, using rigid links. (I've attached a picture for clarity). I've tried the card NODAL_RIGID_BODY but it won't work, unless I connect each node of the solid to the nodal mass, which I don't want to (I just want to connect the nodal mass to the side facing the nodal mass (the hatched side on the picture)). I've been looking into the User Manual and I wanted to try the following cards to create these rigid links:

- CONSTRAINED_BEAM_IN_SOLID

- CONSTRAINED_JOINT_TRANSLATIONAL

- CONSTRAINED_JOINT_LOCKING

- CONSTRAINED_JOINT_CONSTANT_VELOCITY

- CONSTRAINED_LINEAR_GLOBAL

- CONSTRAINED_MULTIPLE_GLOBAL

(- CONSTRAINED_NODAL_RIGID_BODY)

- CONSTRAINED_NODE_INTERPOLATION

- CONSTRAINED_NODE_SET

- CONSTRAINED_SOLID_IN_SOLID

Rather than trying each one of these parameters, I was wondering if someone could help me with rigid links.

Thanks!