Keyword type: step
This option is used to define the name of the file in which the stiffness matrix of the substructure is to be stored which was generated within a *SUBSTRUCTURE GENERATE step. This is the only procedure in which this keyword card makes sense.
There are two optional parameters STIFFNESS and OUTPUT FILE, and one required parameter FILE NAME.
The optional parameters can only take a fixed value: STIFFNESS=YES and OUTPUT FILE= USER DEFINED. No other value is allowed.
The required parameter FILE NAME is used to define the name of the file in which the stiffness is to be stored. The extension .mtx is default and cannot be changed. It is automatically appended to the name given by the user.
Example: *SUBSTRUCTURE MATRIX OUTPUT,FILE NAME=substruc
defines file substruc.mtx for the storage of the substructure stiffness matrix.
Example files: substructure.