STATE Files

RADIOSS writes out formatted output files (ASCII Output files) from RADIOSS Starter and RADIOSS Engine. It can be *.STA file or a *.STY file. The purpose of the *.STA-file is to save the state of element and then make it possible to include it into a _0000.rad file for RADIOSS Starter. Although the *.STY file is an advanced version addressing the same purpose, it is not recommended since it is a legacy format.

This document helps you understand the use case and steps to create a *.STA state file in Radioss Block format.

Use Case:

The *.STA files can be used to impose initial state on shell or solids in subsequent runs through the keyword #include or through the keyword /STATE/STR_FILE to read the stress file.

Procedure to create and use sta files

1.  Set up RADIOSS Engine to write *.sta file:

The Runname_nnnn.sta is written by entering the following keyword in the RADIOSS Engine files. This must be set in /STATE/DT in the Engine file. STATE files are written with a time frequency Tfreq, the first file being written at time Tstart.

/STATE/DT

Tstart Tfreq

part_ID1... part_IDN

Data / Description
Tstart / Start time
Tfreq / Time frequency
part_ID1 ... part_IDN / List of parts

NOTE: As of version 11.0, you can also use keyword /STATE/STR_FILE in Engine file to write the Stress file separately, which can be compressed (using gzip). In such a case, the stress file name will be Runname_nnn#.str, where Runname is the Run Name (see /RUN) and nnn# is the file number (4 digits) from 0001 to 9999 (same as the state file number).

The following cards show the types of output available. Depending on which type of elements and which data should needs to be saved in the *.sta, write the /STATE/DT card along with the below.

/STATE/DT

/STATE/BRICK/AUX/FULL

/STATE/BRICK/STRAIN/FULL

/STATE/BRICK/STRES/FULL

/STATE/SHELL/AUX/FULL

/STATE/SHELL/EPS/FULL

/STATE/SHELL/ORTHL

/STATE/SHELL/STRAIN/FULL

/STATE/SHELL/STRESS/FULL

2.  Set up RADIOSS starter to read *.sta file:

The state files can be used to impose initial state on shell or solids in subsequent runs through the keyword #include or through the keyword /STATE/STR_FILE to read the stress file. i.e. adding either one of the below.

#include TEST_LOI70_0011.sta

OR

/STATE/STR_FILE

0

TEST_LOI70_0011.str

Important Note:

·  The *.sta should be in the same directory as the file 0000.rad

·  The STA-file contains nodes and elements. Delete the concerned nodes from the node definition of the 0.rad and concerned elements from the element definition (for example: /BRICK, /SHELL .....) of the 0.rad; otherwise there will be an error in Starter.