NX Nastran DMAP Programmer's Guide - Kxcad.net

1325
READ
Extracts real symmetric system eigenvaules
READ Extracts real symmetric system eigenvaules
Extracts eigenvaules from a real symmetric system.
To solve the following equations for eigenvalues and their associated eigenvectors:
Format:
READ KAA,MAA,MR,DAR,DYNAMIC,USET,CASECC,
Input Data Blocks:
( [ K]
– λ[ M]
) { u}
= 0 for vibration analysis
[ K]
λ K d
( – [ ] ) { u}
= 0 for buckling analysis
⎧VACOMP⎫ ⎧INVEC ⎫ ⎧ LLL ⎫
PARTVEC,SIL, ⎨ ⎬ , ⎨ ⎬,
⎨ ⎬ ,
⎩SPCCOL⎭ ⎩EQMAP ⎭ ⎩VFO1 ⎭
⎧EQEXIN, ⎫
⎨ ⎬
⎩ ⎭
⎧ ⎫
⎨ ⎬
⎩GAPAR ⎭
/
LAMA,PHA,MI,OEIGS,LAMMAT,OUTVEC/
FORMAT/S,N,NEIGV/NSKIP/FLUID/SETNAME/SID/METH/
F1/F2/NE/ND/MSGLVL/MAXSET/SHFSCL/NORM/PRTSUM/
MAXRATIO $
KAA K matrix in Eq. 4-23.
MAA M matrix in Eq. 4-23 or K d matrix in Eq. 4-24.
MR Rigid body mass matrix
DAR Rigid body transformation matrix.
DYNAMIC Eigenvalue Extraction Data (output by IFP module).
USET Degree-of-freedom set membership table.
Eq. 4-23
Eq. 4-24
CASECC Case Control Data Table (selects EIGR, EIGRL, or EIGB entries, output
by IFP module).
PARTVEC Partitioning vector with values of 1.0 at the rows corresponding to
degrees of freedom which were eliminated in the partition to obtain
KAA and MAA. Required for maximum efficiency. See SETNAME
parameter description below.