NX Nastran DMAP Programmer's Guide - Kxcad.net

1193
MERGE
Matrix merge
Case 4: Neither {CP} nor {RP} are purged and SYM ≥ 0:
MERGE A11,A21,A12,A22,CP,RP/A/1 $
[A11] is a (NROWA – NR) by (NCOLA – NC)
matrix.
[A21] is a NR by (NCOLA – NC) matrix.
[A12] is a (NROWA – NR) by NC matrix
[A22] is a NR by NC matrix.
2. [A11], [A12], [A21], and [A22] must be unique matrices.
3. When FORM = 0, a compatible matrix [A] results as shown in the following table:
4. Any or all of [A11], [A12], [A21], [A22] may be purged. When all are purged, this
implies [A] = 0.
5. Both {RP} and {CP} may not be purged.
Form of [A22]
Square Rectangular Symmetric
Square Square Rectangular Rectangular
Form of [A11] Rectangular Rectangular Rectangular Rectangular
Symmetric Rectangular Rectangular Symmetric
Examples:
1. Let A11, A12, A21, A22, {CP} and {RP} be defined as follows:
[ A11]
=
2.0
[ A12]
6.0
=
1.0 3.0 4.0
5.0 7.0 8.0
[ A21]
= 10.0 [ A22]
= 9.0 11.0 12.0
( CP)
⎧1.0 ⎫
⎪ ⎪
⎪0.0 ⎪
=
⎨ ⎬
⎪1.0 ⎪
⎪
⎩
1.0 ⎪
⎭
A11 A12
A21 A22
→ [ A]