| Description | Type | Default |
|---|---|---|
|
COUPMASS > 0 or ON requests the generation of coupled rather than diagonal mass matrices for elements with coupled mass capability. This option applies to both structural and nonstructural mass for the following elements: CBEAM, CBAR, CROD, CQUAD4, CQUADR, CTRIA3, CTRIAR, CHEXA, CPENTA, CPYRA, and CTETRA. A negative value or OFF causes the generation of diagonal mass matrices for all of the above elements. The diagonal mass matrix is formed by scaling the diagonal terms of the coupled mass matrix for the correct element mass and setting the off-diagonal terms to zero. Note that the diagonal mass matrix formulation includes rotary inertia terms. The AUTO setting (default) will use the coupled mass formulation when rigid elements or multipoint constraints are specified in the model. |
Integer ON/OFF AUTO |
AUTO |