Parameters are used for input of scalar values and for requesting special features. Parameters can be specified in the Case Control and the Bulk Data Sections of the Model Input File, in the Model Initialization File, or on the Nastran command line. Note the following examples:
Model Input File
Case Control Section
PARAM, STIFFRATIOTOL, 1.0E-8
PARAM, AUTOSPC, ON
Bulk Data Section
PARAM, STIFFRATIOTOL, 1.0E-8
PARAM, AUTOSPC, ON
Model Initialization File
STIFFRATIOTOL = 1.0E-8
AUTOSPC = ON
Nastran Command Line
NASTRAN filename.NAS STIFFRATIOTOL=1.0E-8 AUTOSPC=ON
Parameters in the Bulk Data Section use 16 character fields. Parameters specified in the Model Initialization File and on the Nastran command line use directive format (i.e., directive = option).