Linear Static Analysis (Elasticity, Parallel)
Linear Static Analysis (Elasticity, Parallel)
To run 4 parallel static analysis(elasticity), and you can use the data in tutorial/02_elastic_hinge_parallel.
Analysis target
| Item | Description | Notes | Reference |
|---|---|---|---|
| Type of analysis | Linear static analysis | !SOLUTION,TYPE=STATIC | |
| Number of nodes | 84,056 | ||
| Number of elements | 49,871 | ||
| Element type | 10-node tetrahedron quadratic element | !ELEMNT,TYPE=342 | Element Library |
| Material name | STEEL | !MATERIAL,NAME=STEEL | Material Data |
| Material property | ELASTIC | !ELASTIC | |
| Boundary conditions | Restraint, Concentrated force | ||
| Matrix solution | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Fig. 4.2.1 : Analysis area of each node
Analysis
Extract the code FrontISTR code and go to the directory in this example to check if you have the files necessary for analysis.
| File name | Type | Role |
|---|---|---|
hecmw_ctrl.dat |
Global control data | |
hinge.cnt |
Analysis control data | |
hinge.msh |
Mesh data | |
hecmw_part_ctrl.dat |
Domain segmentation control data | Control data to divide the mesh data into regions by hecmw_part1 |
$ tar xvf FrontISTR.tar.gz
$ cd FrontISTR/tutorial/02_elastic_hinge_parallel
$ ls
hecmw_ctrl.dat hecmw_part_ctrl.dat hinge.cnt hinge.msh
A stress analysis is performed to constrain the displacement of the constrained surface and add concentrated loads to the forced surface.
The overall control data, analysis control data and domain division control data are shown below.
Global control data hecmw_ctrl.dat
#
# for partitioner
#
!MESH, NAME=part_in,TYPE=HECMW-ENTIRE # The original mesh data to be split in hecmw_part1
hinge.msh
!MESH, NAME=part_out,TYPE=HECMW-DIST # File name after splitting by hecmw_part1
hinge_4
#
# for solver
#
!MESH, NAME=fstrMSH, TYPE=HECMW-DIST # Specify the mesh data to be split
hinge_4
!CONTROL, NAME=fstrCNT # Specify 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 version of the file format
3
!SOLUTION, TYPE=STATIC # Specify the type of analysis
!WRITE,RESULT # Specification of the result data output
!WRITE,VISUAL # Specify the output of visualization data
## Solver Control
### Boundary Conditon
!BOUNDARY
BND0, 1, 3, 0.000000 # Restrained surface 1
!BOUNDARY
BND1, 1, 3, 0.000000 # Restrained surface 2
!CLOAD
CL0, 1, 0.01000 # Specify a forced surface
### Material
!MATERIAL, NAME=STEEL # Specify material properties
!ELASTIC # Definition of elastic substances
210000.0, 0.3
!DENSITY # Definition of mass density
7.85e-6
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=YES,TIMELOG=YES # Solver control
10000, 2
1.0e-08, 1.0, 0.0
## Post Control
!VISUAL,metod=PSR # Specify the visualization methods
!surface_num=1 # Number of surfaces in a surface rendering
!surface 1 # Specify the contents of the surface
!output_type=VTK # Specify the type of the visualization file
!END # Indicates the end of the analysis control data
Domain division control data hecmw_part_ctrl.dat
!PARTITION,TYPE=NODE-BASED,METHOD=PMETIS,DOMAIN=4,UCD=part.inp
Analysis procedure
In order to run FrontISTR at MPI, the mesh data hinge.msh is first divied into four regions.
$ hecmw_part1
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 called hinge_4.x and part.inp will be generated.
$ ls
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, you will execute the FrontISTR command fistr1 with MPI.
$ mpirun -np 4 fistr1 -t 1
(MPI 4 parallel, 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 completed when FrontISTR Completed!! is displayed, the analysis is done.
Analysis Results
Once the analysis is complete, several new files will be created.
$ ls
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
The *.res.* is the result data, which contains results of analysis of each MPI node of FrontISTR.
The *_vis_* is called visualization data, and can be displayed by general-purpose visualization software. In this example, the data is output in VTK format and can be displayed using ParaView or other visualization software.
Fig. 4.2.2 Analytical results for Mises stress(displayed in VTK)
Log file 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