NX Nastran DMAP Programmer's Guide - Kxcad.net

FA1
Prepares the modal matrices for flutter eigenvalue analysis
FA1 Prepares the modal matrices for flutter eigenvalue analysis
Prepares the modal matrices for flutter eigenvalue analysis. Also performs the
eigenvalue analysis for the KE or PK method.
Format:
FA1 KHH,BHH,MHH,QHHL,CASECC,EDT/
FSAVE,KHH1,BHH1,MHH1/
S,N,FLOOP/S,N,TSTART/S,N,NOCEAD/LPRINT $
Input Data Blocks:
KHH Generalized (modal) stiffness matrix.
BHH Generalized (modal) damping matrix
MHH Generalized (modal) mass matrix
QHHL Aerodynamic matrix list
CASECC Table of Case Control command images.
EDT Table of Bulk Data entry images related to element deformation,
aerodynamics, p-element analysis, divergence analysis, and the
iterative solver. Also contains SET1 entries.
Output Data Blocks:
FSAVE Flutter storage save or answer table
KHH1 Modified generalized (modal) stiffness matrix.
BHH1 Modified generalized (modal) damping matrix
MHH1 Modified generalized (modal) mass matrix
Parameters:
FLOOP Input/output-integer-no default. Flutter eigenvalue analysis loop
counter. Set to zero for initial entry and incremented by one for each
loop until the last loop then set to -1.
TSTART Output-integer-no default. CPU clock time at entry to module.
NOCEAD Output-integer-default=0. Complex eigenvalue analysis flag. Set to 1 if
complex eigenvalue analysis needs to be performed, otherwise, set
to -1.
LPRINT Input-logical-default=TRUE. Print flag for flutter analysis.
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