Lumped Mass Matrix export
In a modal analysis I want to create a lumped mass matrix for a cube and the corresponding stiffness matrix. The cube should initially only have nodes at the corners.
My APDL command is:
Unfortunately I get 108 mass entries with 8 nodes, which is a consistent mass matrix, but should only get 24 entries (8 nodes x 3 degrees of freedom per node)
I'm hoping someone can help me.