ABAQUS Volume II: I–Z - Manual (Page 137)

*MATRIX
13.6 *MATRIX: Read in the stiffness or mass matrix for a linear user element.
This option can be used only in conjunction with the *USER ELEMENT, LINEAR option. It is used to read
in the stiffness or mass matrix for the user element. It can be used once if only a stiffness or mass is required
or twice to give both matrices.
Product: ABAQUS/Standard
Type: Model data
Level: Part, Part instance, Model
References:
•
“User-defined elements,” Section 26.15.1 of the ABAQUS Analysis User’s Manual
•
*USER ELEMENT
Required parameter:
TYPE
Set TYPE=MASS to define the mass matrix. Set TYPE=STIFFNESS to define the stiffness matrix.
Optional parameter:
INPUT
Set this parameter equal to the name of the alternate input file from which the data lines are to
be read. See “Input syntax rules,” Section 1.2.1 of the ABAQUS Analysis User’s Manual, for the
syntax of such file names. If this parameter is omitted, it is assumed that the data follow the keyword
line.
Data lines to define the matrix:
First line:
1. Matrix entries, four per line.
Repeat this data line as often as necessary.
13.6–1
ABAQUS Version 6.1 Module: ID:
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