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abaqus

abaqus

Kurzinformation

Abaqus is a software suite for finite element analysis and computer aided engineering.


 Detailinformation 

1. How to Access the Software

Load the module and see the version informations:

$> module load TECHNICS
# which abaqus versions are available?
$> module avail abaqus
$> module load abaqus
# or load specific version
$> module load abaqus/2018
$> abaqus information=release

2. Example Batch Script

#!/usr/local_rwth/bin/zsh
 
### Job name
#SBATCH --job-name=abaqus_slurm_job
 
### File/Path where STDOUT will be written to, %J is the job id
#SBATCH --output abaqus-job-log.%J
 
### Request the time you need for execution. The full format is D-HH:MM:SS
### You must at least specify minutes or days and hours and may add or
### leave out any other parameters
#SBATCH --time=5:00
 
### Request the memory you need for your job. You can specify this
### in either MB (1024M) or GB (4G). BEWARE: This is a per-cpu limit,
### and will be multiplied with cpus-per-task for the total requested memory
#SBATCH --mem-per-cpu=3900M
 
### Request number of hosts
#SBATCH --nodes=1
 
### Request number of CPUs/MPI Ranks
#SBATCH --ntasks=4
 
### Initialization of the software
module load TECHNICS
module load abaqus
 
### Set the amount of memory to be passed to Abaqus as a command line argument
### Beware: This HAS to be lower than the value you requested via --mem-per-cpu
export ABAQUS_MEM_ARG=3584mb
 
### Change (!) to your desired work directory
cd $HOME/path/to/your/dir
 
### Create ABAQUS environment file for current job, you can set/add your own options (Python syntax)
env_file=abaqus_v6.env
 
cat << EOF > ${env_file}
#verbose = 3
#ask_delete = OFF
mp_file_system = (SHARED, LOCAL)
mp_host_list = $R_WLM_ABAQUSHOSTLIST
EOF
 
unset SLURM_GTIDS
 
### name your job HERE, name it DIFFERENT from your input file!
JOBNAME=name_of_my_job
INPUTFILE=input_file.inp
 
unsetopt -o NOMATCH
rm -f $JOBNAME.* 2>/dev/null
setopt -o NOMATCH
 
### Execute your application
### Please remember, to adjust the memory, it must be less than requested above
abaqus interactive job=$JOBNAME input=$INPUTFILE cpus=$SLURM_NTASKS memory=$ABAQUS_MEM_ARG
 

3. Best Practices for Abaqus Jobs

  • Don't name your input file $JOBNAME.inp. It will be deleted by the batch script and your job won't start.
  • Use separate directories for each job. The file abaqus_v6.env e.g. could be overwritten by a newly starting job.
  • Use job dependencies or job arrays, such that only one or at least a few jobs run concurrently. They might "steal" licenses from each other.

4. Submitting Abaqus Jobs with Fortran User Subroutines

  • Pre-compile your subroutine as a shared library with the following command line:
 
$> module load TECHNICS
$> module load abaqus
$> abaqus make -library yoursubfile.f
  • Un-comment (remove the '#' character) from the line 'usub_lib_dir=os.getcwd()' in the above example script
  • Please make sure that the above entrys (between 'EOF' marks) in don't have leading spaces or tabs
 

5. General information about abaqus

Look >>>here<<< for more information about abaqus and especially this PDF document about the license model of abaqus.

But in short, the following table shows the token usage for a number of cores for an abaqus job.

 
number of cores
1
2
4
8
12
16
24
32
64
128
needed tokens56812141619212838

or as picture:

Abaqus Tokens


FAQ

I'm not able to see my model in abaqus cae, I only get a "blue" screen.

There exist two solutions:

  • open your model in abaqus cae on the host "cluster-linux-nehalem.rz.rwth-aachen.de", this one is running still Scientific Linux 6.7 instead of CentOS 7.2, but its end of life is end of Juli 2016
  • open abaqus cae with MESA support ( thanks to Mrs. Toups for the tip ). For this use "abaqus cae -mesa" instead of "abaqus cae". This can be done via
    • FastX2 ( the preferred way )
    • ssh, which is horrably slow

I'm getting an error: Abaqus Error: The following file(s) could not be located: ....inp

Don't name your input file $JOBNAME.inp, it got deleted! Also make sure that you did use an existing .inp filename and the right path.

I'm getting an error: Abaqus Error: It is required that the local host is in the host list for this run. Local host: linuxbsc013.rz.RWTH-Aachen.DE, mp_host_list: (('linuxbsc005.rz.rwth-aachen.de', 12),)

Use separate directories for each job, abaqus_v6.env got overwritten by another starting job!

I'm getting an error: "..." license request queued for the License Server. Total time in queue: ... seconds.

Too many licenses have been checked out. The LSF scheduler does not check if free abaqus licenses are available before a job is started. Unfortunately, if no license is available, abaqus does not directly abort but waits until a license becomes available. From LSF's point of view however, the job is running and will therefore be accounted as usual.

So only let one or at least a few jobs run at one time. This could be done with job dependencies or with array jobs.

last changed on 29.01.2021

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