Software at OSC |
ANSYSIntroductionANSYS is an engineering package and support routine for general-purpose, finite-element analysis: statics, mode frequency, stability analysis, heat transfer, magnetostatics, coupled field analysis, and modeling. ANSYS was developed and is supported by ANSYS, Inc. Academic Use VersionVersion 11.0 is currently available at OSC. AvailabilityANSYS is available on the Glenn Cluster, the Itanium 2 Cluster, the BALE Cluster and the Altix. UsageUse of ANSYS for academic purposes requires validation. To obtain validation please complete and return "Academic Agreement to Use ANSYS." This can be obtained from your site consultant or from the files ansys.pdf, ansys.ps, or ansys.txt located in the Academic Agreement Forms. ANSYS supports X11 Windows and 3-D devices. PostScript and HP-GL output are available through the DISPLAY program. Usage: GeneralANSYS can only be run on OSC systems, but it can be run in interactive mode or in batch mode. Interactive mode is similar to running ANSYS on a desktop machine in that the graphical user interface will be sent from OSC and displayed on the local machine. Batch mode means that you will submit the ANSYS job to be run at a later time by providing all of the ANSYS menu commands needed to run the simulation asynchronously. Interactive jobs are run on the login machine of the cluster, and are limited to approimately 1gb of memory and 1 hour of CPU time. Batch jobs can request days of computing time, up to the limits of the individual systems, which can be found in the computing pages. Batch jobs run on on eof th ecompute nodes of the system and not on the login node. The intention is that users can run ANSYS interactively for the purpose of building their model and preparing their input file. Once developed this input file can then be run in batch mode The ANSYS commands are placed in your execution path with a module load command. ANSYS is normally started by typing the version specific command, e.g. ansys110. For convenience, OSC has created a symbolic link from the name ansys to the actual command (e.g. ansys110). The ANSYS utility programs (see below) are located in the same path. module load ansys Following a successful loading of a version of ANSYS, you simply use the ansys command: ansys <switch options> <file> The ansys command takes a number of Unix-style switches and parameters. The -j Switch
The -d Switch
The -m Switch
The -b [nolist] Switch
The -s [noread] Switch
The -g [off] Switch
ANSYS parameters
Unix Interactive, ANSYS Interactive To run ANSYS interactively enter: ansys To run ANSYS non-interactively, enter: ansys -g off <ansys.in >ansys.out Sample Batch ScriptFor a given model, preparing the input file has resulted in the following commands neededing to be run once within ANSYS: RESUME /PREP7 D,30557,VOLT,1 FINISH /SOLU /STATUS,SOLU SOLVE Y FINISH /POST1 SET,FIRST PRNSOL,DOF, CONTINUOUS FINISH /EXIT,NOSAV These commands can be put in a file called ansys.in. Assume that it is known that this solution will take approximately 20 hours. To include some margin of error, 30 hours will be requested. This is a serial applicaiton, so only 1 processor is needed. The corresponding batch script would look like: #PBS -N ansys_test #PBS -l walltime=30:00:00 #PBS -l nodes=1:ppn=1 #PBS -j oe cd $TMPDIR cp $PBS_O_WORKDIR/* . module load ansys ansys < ansys.in cp * $PBS_O_WORKDIR If the above script is saved in the file submit_ansys.job, then the job would be submitted with the command: qsub submit_ansys.job Information on how to monitor the job can be found in the computing environments section. DocumentationOnline help is available from the graphical user interface (ansys -g). A number of example input files are provided by the vendor. These are located in the directory /usr/local/ansys/11.0/v110/ansys/data/verif. |
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