Linear Static Analysis (Elasticity, Parallel)¶
To perform static analysis (elasticity) with 4-way parallel execution, use the data in tutorial/02_elastic_hinge_parallel.
Analysis Target¶
| Item | Description | Notes | Reference |
|---|---|---|---|
| Analysis type | Linear static analysis | !SOLUTION,TYPE=STATIC | |
| Number of nodes | 84,056 | ||
| Number of elements | 49,871 | ||
| Element type | 10-node quadratic tetrahedral element | !ELEMENT,TYPE=342 | Element Library |
| Material name | STEEL | !MATERIAL,NAME=STEEL | Material Data |
| Material properties | ELASTIC | !ELASTIC | |
| Boundary conditions | Restraint, concentrated load | ||
| Matrix solver | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Figure 4.2.1 Computational domain of each node
Analysis Setup¶
Extract the FrontISTR code, move to the directory for this example, and check that the following files required for the analysis
| File name | Type | Role |
|---|---|---|
| hecmw_ctrl.dat | Overall Control Data | |
| hinge.cnt | Analysis Control Data | |
| hinge.msh | Mesh data | |
| hecmw_part_ctrl.dat | Partitioning control data | Control data used when hecmw_part1 divides the mesh data into domains |
are present.
Output:
Perform a stress analysis in which the displacement of the constrained surfaces is restrained and a concentrated load is applied to the load surface.
The Overall Control Data, Analysis Control Data, and partitioning control data are shown below.
Overall Control Data hecmw_ctrl.dat¶
#
# for partitioner
#
!MESH, NAME=part_in,TYPE=HECMW-ENTIRE # Original mesh data to be partitioned by hecmw_part1
hinge.msh
!MESH, NAME=part_out,TYPE=HECMW-DIST # File name after partitioning by hecmw_part1
hinge_4
#
# for solver
#
!MESH, NAME=fstrMSH, TYPE=HECMW-DIST # Specify the partitioned mesh data
hinge_4
!CONTROL, NAME=fstrCNT # Specify the analysis control data
hinge.cnt
!RESULT, NAME=fstrRES, IO=OUT # Specify the result data
hinge.res
!RESULT, NAME=vis_out, IO=OUT # Specify the visualization data
hinge_vis
Analysis Control Data hinge.cnt¶
# Control File for FISTR
## Analysis Control
!VERSION # Specify the file format version
3
!SOLUTION, TYPE=STATIC # Specify the analysis type
!WRITE,RESULT # Specify result data output
!WRITE,VISUAL # Specify visualization data output
## Solver Control
### Boundary Condition
!BOUNDARY
BND0, 1, 3, 0.000000 # Specify constrained surface 1
!BOUNDARY
BND1, 1, 3, 0.000000 # Specify constrained surface 2
!CLOAD
CL0, 1, 0.01000 # Specify the load surface
### Material
!MATERIAL, NAME=STEEL # Specify material properties
!ELASTIC # Define the elastic material
210000.0, 0.3
!DENSITY # Define mass density
7.85e-6
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=YES,TIMELOG=YES # Control the solver
10000, 2
1.0e-08, 1.0, 0.0
## Post Control
!VISUAL,method=PSR # Specify the visualization method
!surface_num=1 # Number of surfaces in one surface rendering
!surface 1 # Specify the surface contents
!output_type=VTK # Specify the visualization file type
!END # Indicate the end of the analysis control data
Partitioning Control Data hecmw_part_ctrl.dat¶
Analysis Procedure¶
To run FrontISTR with MPI, first divide the mesh data hinge.msh into four domains.
Output:
Oct 07 11:04:52 Info: Reading mesh file...
Oct 07 11:04:52 Info: Starting domain decomposition...
Oct 07 11:04:52 TH(0/8) Info: Creating local mesh for domain #0 ...
Oct 07 11:04:52 TH(2/8) Info: Creating local mesh for domain #1 ...
Oct 07 11:04:52 TH(6/8) Info: Creating local mesh for domain #2 ...
Oct 07 11:04:52 TH(7/8) Info: Creating local mesh for domain #3 ...
Oct 07 11:04:52 Info: Domain decomposition done
New files named hinge_4.x and part.inp are generated.
Output:
hecmw_ctrl.dat hecmw_part_ctrl.dat hinge.msh hinge_4.1 hinge_4.3
hecmw_part.log hinge.cnt hinge_4.0 hinge_4.2 part.inp
Next, run the FrontISTR executable fistr1 using MPI.
(Run with 4 MPI processes and 1 OpenMP thread)
##################################################################
# FrontISTR #
##################################################################
---
version: 5.1.0
git_hash: acab000c8c633b7b9d596424769e14363f720841
build:
date: 2020-10-05T07:39:55Z
MPI: enabled
OpenMP: enabled
option: "-p --with-tools --with-refiner --with-metis --with-mumps --with-lapack --with-ml --with-mkl "
HECMW_METIS_VER: 5
execute:
date: 2020-10-07T11:07:21+0900
processes: 4
threads: 1
cores: 4
host:
0: flow-p06
1: flow-p06
2: flow-p06
3: flow-p06
---
...
Step control not defined! Using default step=1
fstr_setup: OK
Start visualize PSF 1 at timestep 0
loading step= 1
sub_step= 1, current_time= 0.0000E+00, time_inc= 0.1000E+01
loading_factor= 0.0000000 1.0000000
### 3x3 BLOCK CG, SSOR, 2
1 2.183567E+00
2 2.423900E+00
3 2.939117E+00
...
2084 1.158654E-08
2085 1.032414E-08
2086 9.436273E-09
### Relative residual = 9.43589E-09
### summary of linear solver
2086 iterations 9.435886E-09
set-up time : 4.695220E-02
solver time : 7.103976E+01
solver/comm time : 1.929294E+01
solver/matvec : 1.544405E+01
solver/precond : 3.243278E+01
solver/1 iter : 3.405549E-02
work ratio (%) : 7.284205E+01
Start visualize PSF 1 at timestep 1
### FSTR_SOLVE_NLGEOM FINISHED!
====================================
TOTAL TIME (sec) : 72.42
pre (sec) : 0.29
solve (sec) : 72.13
====================================
FrontISTR Completed !!
The analysis is complete when FrontISTR Completed !! is displayed.
Analysis Results¶
When the analysis is complete, several new files are created.
Output:
0.log FSTR.dbg.3 hinge.cnt hinge.res.2.1 hinge_vis_psf.0000
1.log FSTR.msg hinge.msh hinge.res.3.0 hinge_vis_psf.0000.pvtu
2.log FSTR.sta hinge.res.0.0 hinge.res.3.1 hinge_vis_psf.0001
3.log hecmw_ctrl.dat hinge.res.0.1 hinge_4.0 hinge_vis_psf.0001.pvtu
FSTR.dbg.0 hecmw_part.log hinge.res.1.0 hinge_4.1 part.inp
FSTR.dbg.1 hecmw_part_ctrl.dat hinge.res.1.1 hinge_4.2
FSTR.dbg.2 hecmw_vis.ini hinge.res.2.0 hinge_4.3
*.res.* files are result data containing the FrontISTR analysis results for each MPI node. They can be displayed with REVOCAP_PrePost and similar tools.
*_vis_* files are visualization data and can be displayed with general-purpose visualization software. In this example, the data is output in VTK format, so use ParaView or similar software to display it.
Figure 4.2.2 Analysis result of von Mises stress (displayed in VTK)
Analysis Result Log 0.log¶
fstr_setup: OK
#### Result step= 0
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 0.0000E+00 1 0.0000E+00 1
//U2 0.0000E+00 1 0.0000E+00 1
//U3 0.0000E+00 1 0.0000E+00 1
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 0.0000E+00 14 0.0000E+00 14
//U2 0.0000E+00 14 0.0000E+00 14
//U3 0.0000E+00 14 0.0000E+00 14
//E11 0.0000E+00 14 0.0000E+00 14
//E22 0.0000E+00 14 0.0000E+00 14
//E33 0.0000E+00 14 0.0000E+00 14
//E12 0.0000E+00 14 0.0000E+00 14
//E23 0.0000E+00 14 0.0000E+00 14
//E31 0.0000E+00 14 0.0000E+00 14
//S11 0.0000E+00 14 0.0000E+00 14
//S22 0.0000E+00 14 0.0000E+00 14
//S33 0.0000E+00 14 0.0000E+00 14
//S12 0.0000E+00 14 0.0000E+00 14
//S23 0.0000E+00 14 0.0000E+00 14
//S31 0.0000E+00 14 0.0000E+00 14
//SMS 0.0000E+00 14 0.0000E+00 14
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 0.0000E+00 14 0.0000E+00 14
//E22 0.0000E+00 14 0.0000E+00 14
//E33 0.0000E+00 14 0.0000E+00 14
//E12 0.0000E+00 14 0.0000E+00 14
//E23 0.0000E+00 14 0.0000E+00 14
//E31 0.0000E+00 14 0.0000E+00 14
//S11 0.0000E+00 14 0.0000E+00 14
//S22 0.0000E+00 14 0.0000E+00 14
//S33 0.0000E+00 14 0.0000E+00 14
//S12 0.0000E+00 14 0.0000E+00 14
//S23 0.0000E+00 14 0.0000E+00 14
//S31 0.0000E+00 14 0.0000E+00 14
//SMS 0.0000E+00 14 0.0000E+00 14
#### Result step= 1
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 7.4906E-03 50978 -6.9368E-04 51989
//U2 6.1150E-05 2426 -1.2781E-04 40202
//U3 1.8720E-04 2712 -5.5024E-03 67858
//E11 1.3024E-03 28591 -1.2844E-03 28580
//E22 2.1102E-04 24593 -2.0594E-04 205
//E33 6.8634E-04 51036 -5.9603E-04 67794
//E12 5.2186E-04 209 -5.4559E-04 28641
//E23 2.5417E-04 28521 -3.2956E-04 187
//E31 7.2396E-04 36168 -9.5847E-04 28591
//S11 3.6844E+02 28591 -3.6387E+02 28580
//S22 1.5841E+02 28591 -1.5743E+02 28580
//S33 1.5959E+02 51036 -1.5643E+02 28580
//S12 4.2150E+01 209 -4.4067E+01 28641
//S23 2.0529E+01 28521 -2.6618E+01 187
//S31 5.8474E+01 36168 -7.7415E+01 28591
//SMS 2.5134E+02 28591 3.5157E-02 12726
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 1.0115E-03 9959 -9.7870E-04 9942
//E22 1.5457E-04 13694 -1.4639E-04 7189
//E33 5.9415E-04 44563 -5.0497E-04 47965
//E12 3.5513E-04 9579 -3.9083E-04 9600
//E23 2.0608E-04 9563 -2.3480E-04 9589
//E31 5.7633E-04 43142 -4.8019E-04 9571
//S11 2.6038E+02 9573 -2.5605E+02 9571
//S22 1.0144E+02 9573 -1.0100E+02 9571
//S33 1.3921E+02 44569 -1.1431E+02 47974
//S12 2.8683E+01 9579 -3.1567E+01 9600
//S23 1.6645E+01 9563 -1.8964E+01 9589
//S31 4.6550E+01 43142 -3.8785E+01 9571
//SMS 2.0350E+02 9959 3.4602E-02 28
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 3.9115E-02 82452 -7.1083E-04 65233
//U2 7.4504E-05 354 -5.8813E-04 696
//U3 5.9493E-04 84 -5.8751E-03 61080
//E11 1.3777E-03 130 -1.3653E-03 77625
//E22 4.9199E-04 61 -5.4370E-04 102
//E33 6.8634E-04 51036 -6.1176E-04 30070
//E12 7.1556E-04 27808 -6.8093E-04 27863
//E23 5.3666E-04 56 -5.4347E-04 82
//E31 7.2396E-04 36168 -9.6621E-04 130
//S11 3.8626E+02 130 -3.6387E+02 28580
//S22 1.6628E+02 130 -1.5743E+02 28580
//S33 1.6502E+02 30033 -1.5643E+02 28580
//S12 5.7795E+01 27808 -5.4998E+01 27863
//S23 4.3345E+01 56 -4.3896E+01 82
//S31 5.8474E+01 36168 -7.8040E+01 130
//SMS 2.8195E+02 77625 1.2755E-02 75112
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 1.0731E-03 10485 -1.2123E-03 41779
//E22 3.9143E-04 33536 -4.1389E-04 22892
//E33 5.9415E-04 44563 -5.0497E-04 47965
//E12 5.3264E-04 9163 -5.0405E-04 9161
//E23 3.9226E-04 33024 -4.1464E-04 23465
//E31 5.7633E-04 43142 -4.8019E-04 9571
//S11 2.7231E+02 9180 -2.9763E+02 41779
//S22 1.0792E+02 9180 -1.0656E+02 41779
//S33 1.3921E+02 44569 -1.1431E+02 47974
//S12 4.3021E+01 9163 -4.0712E+01 9161
//S23 3.1683E+01 33024 -3.3490E+01 23465
//S31 4.6550E+01 43142 -3.8785E+01 9571
//SMS 2.4057E+02 41779 3.1383E-02 38687