NX Nastran DMAP Programmer's Guide - Kxcad.net

LAMX
Eigenvalue Table Editor
Examples:
1. For LAMA (real) tables:
• Assume that 10 modes are defined in the LAMA table. It is now desired to
modify the frequency data of the LAMA table in the following way:
Mode(s)
The DMI header record entry is also required: DMI,EMAT,0,2,1,1,,3,10
The DMAP is:
DMIIN DMI,DMINDX/EMAT,,,,,,,,, $
LAMX EMAT,LAMA/LAMB/9 $
EQUIVX LAMB/LAMA/ALWAYS $
• Create a LAMB table with f j = 10.0, 20,0, 30.0, 40, and m j = 1.0, 1.0, 1.0, 2.0.
DMI, FREQMASS, 0, 2, 1, 1, , 3, 4
DMI, FREQMASS, 1, 1, 10.0, 00, 1.0
DMI, FREQMASS, 2, 1, 20.0, 0.0, 1.0
DMI, FREQMASS, 3, 1, 30.0, 0.0, 1.0
DMI, FREQMASS, 4, 1, 40.0, 0.0, 2.0
The DMAP is:
DMIIN DMI,DMINDX/,,,,,,,,,$
LAMX FREQMASS,/LAMB $
OFP LAMB//$
• Generate a matrix LMAT from a LAMA table.
The DMAP is:
LAMX, ,LAMA/LMAT/-1 $
Desired
Modification
1 through 3 none ---
DMl Format for EMAT
4 multiply f 4 by 0.8 DMI,EMAT,4,2,-0.2
5 none ---
6 delete DMI,EMAT,6,3,-1.0
7 replace f 7 by 173.20 DMI,EMAT,7,1,173.20,-1.0
8 replace m 8 by 2.98 DMI,EMAT,8,3,2.98
9 none ---
10 delete DMI,EMAT,10,3,-1.0
2. For CLAMA (complex) tables:
• Create a CLAMA table with eigenvalues -1.0, -1.0, -2.0, -2.0, and -3.0, +1.0.
110