Description: The abaqus fromNastran execution procedure can now calculate the stiffness and mass matrices for CSHEAR and PSHEAR elements in Nastran data and output them to the Abaqus input file as *USER ELEMENT, LINEAR and *MATRIX, TYPE=STIFFNESS and TYPE=MASS. This enhancement enables you to include these data in your Abaqus analyses.

When you use the abaqus toNastran execution procedure to translate the Abaqus substructure in a substructure SIM database to Nastran DMIG coefficients, you can use the new complex parameter to write the structural damping matrix separately or as the imaginary part of the stiffness matrix.