Optistruct
Description
OptiStruct is an industry proven, modern structural analysis solver for linear and nonlinear problems under static and dynamic loadings. - Homepage: http://www.altairhyperworks.com/product/OptiStruct
Documentation
We have documentation available for the following versions of Optistruct
Access
Optistruct is included with Hyperworks.
To see all versions of Hyperworks available:
[ netID@cluster ~]$module spider Hyperworks
To load a particular version of Hyperworks (Example: 2017):
[ netID@cluster ~]$module load Hyperworks/2017
Using Optistruct Solvers
This section covers using the Optistruct Solvers in batch jobs.
SMP Mode
First, you should run a check to determine estimated memory and disk requirements for your Optistruct input:
ml Hyperworks/2017
optistruct -check test.fem
Look at the in-core solution memory and disk space information in the resulting output (has a .out suffix). An in-core solution will attempt to run the solver in memory as much as possible and minimize disk use.
MEMORY ESTIMATION INFORMATION :
-------------------------------
Solver Type is: Sparse-Matrix Solver
Direct Method
Current Memory (RAM) : 1337 MB
Estimated Minimum Memory (RAM) for Minimum Core Solution: 1875 MB
Recommended Memory (RAM) for Minimum Core Solution : 1875 MB
Estimated Minimum Memory (RAM) for Out of Core Solution : 2527 MB
Recommended Memory (RAM) for Out of Core Solution : 2734 MB
Recommended Memory (RAM) for In-Core Solution : 11739 MB <-------------
(Note: Minimum Core Solution Process is Activated.)
(Note: The Minimum Memory Requirement is limited by Output Module.)
DISK SPACE ESTIMATION INFORMATION :
-----------------------------------
Estimated Disk Space for Output Data Files : 412 MB
Estimated Scratch Disk Space for In-Core Solution : 1718 MB <-------------
Estimated Scratch Disk Space for Out of Core Solution : 14962 MB
Estimated Scratch Disk Space for Minimum Core Solution : 15821 MB
The above information shows that estimate requirements of 12 GB of memory and 2 GB of disk space for an in-core solution.
The following example is a job script for running Optistruct in SMP mode with 12 threads based on the above estimates. The number of threads to use in SMP mode for the best performance may vary per input file but should not exceed the numbere of cores on a single node
#!/bin/bash
#JOB SPECIFICATIONS
#SBATCH --job-name=optistruct
#SBATCH --time=2:00:00
#SBATCH --ntasks=1
#SBATCH --ntasks-per-node=1
#SBATCH --cpus-per-task=12
#SBATCH --mem-per-cpu=2000
#SBATCH --error=test.m.error.%j
#SBATCH --output=optistruct.%j
ml Hyperworks/2017
# run optistruct in SMP mode with 12 threads with the in-core solution (completely in memory)
optistruct -nt 12 -core IN test2.fem