Subsections

• Example Environment Variable Definitions

Configuring the Interface

  The interface can be configured to work in different ways; this is achieved by using environment variables (see section 1.4.1). It is only necessary to use these environment variables if the default interface settings are not suitable. Environment variable settings can either be incorporated into a script file which is used to execute FEMGV or defined locally prior to execution. Note that it is not possible to change environment variable settings from within FEMGEN. Table 1.1 illustrates the configuration options which are available.

Variable Purpose Options Default

FG_PRE_INT Sets DYNA3D as the default FE Environment DYNA NEUTRAL (PROPERTY FE DYNA becomes unnecessary)

FG_PRE_VER OASYS/LLNL Input file format control OASYS/LLNL/ LLNL

(Manages format changes between DYNA3D Versions: KEYWORD OASYS writes the fixed format and KEYWORD the keyword format of LS-DYNA3D)

FG_PRE_FOR Controls the input file number formats SMALL/LARGE LARGE (ie. I5/I8, E10/E20), OASYS and LLNL only.

FG_PRE_ERR Extended Error Message Option. YES/NO NO (Controls the writing of error and warning messages to the DYNA3D input file and the FEMGEN log and history files.)

FG_PRE_BLK Sets the maximum history block size integer 3000 (see Chapter 7

FG_PRE_MAT Material Files Directory Definition. dir_name None (See Below.)

FG_PRE_CRV Load curve Directory Definition dir_name None (See Below.)

The first five of these environment variables are simple switches, the last two require a string which gives either the relative or full path name of a directory on the user's system. More detailed information on the last two variables is given in the materials and load curve Chapters of this manual.

The definition of an environment variable varies between computer/operating systems. The following examples illustrate such definitions for the more popular types. The FEMGV Installation and Customisation Guide should be consulted for other system types.

Example Environment Variable Definitions

  Example VAX/VMS environment variable Definition:

ASSIGN OASYS FG_PRE_VER

Example Unix C-Shell environment variable Definition:

setenv FG_PRE_VER OASYS

Example Unix (non C-Shell) environment variable Definition:

FG_PRE_VER=OASYS
export FG_PRE_VER

Example PC environment variable Definition:

set FG_PRE_VER=OASYS

Note: on PC under Windows 95, set the environment variable in the 'autoexec.bat' file. Under Windows NT, set it via:

           
Start -> Settings -> Control Panel -> System -> Environment