7.          Appendix B - Nastran Alters

The following rigid format alters and DMAP sequences are provided with TAMKIT:

 

COMPARE_MODES

Compare modes from two different FEMs

DYNAMIC_TAM

Dynamic TAM reduction method

EFFIND

Effective impendence DOF selection.

EXPAND_MODES

Expand test modes to FEM DOF and optionally calculate residual forces and MRPT stiffness matrix perturbation to localize errors in analysis model.

FAST_ITER_RKE

Iterative Residual Kinetic Energy DOF selection using the fast IRKE algorithm.

HYBRID_TAM

Hybrid TAM reduction method.

IRS_TAM

IRS TAM reduction method.

ITER_GUYAN

Iterative Guyan DOF selection.

ITER_RKE

Iterative Residual Kinetic Energy DOF selection.

MASS_WEIGHTED_EFFIND

Mass weighted effective independence DOF selection.

MODAL_TAM

Modal TAM reduction method

ORTHO

Orthogonality and MAC checks on TAM accuracy and to compare test and analysis modes.  Also optionally calculates residual forces and MRPT stiffness matrix perturbation to localize errors in analysis model.

RESIDUAL_KINETIC_ENERGY

Residual kinetic energy DOF selection

WRITE_GPKE

Write GPKE data in DMIG format and optionally calculate it based on A-set matrices.

WRITE_MODES

Write modes from a FEM run for import in TAM alters.