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Linear Dynamic Analysis¶
For this analysis, the data in tutorial/12_dynamic_beam is used.
Analysis Model¶
The analysis target is a cantilever beam. Its geometry is shown in Figure 4.12.1, and its mesh data is shown in Figure 4.12.2.
| Item | Description | Notes | Reference |
|---|---|---|---|
| Type of analysis | Linear dynamic analysis | !SOLUTION,TYPE=DYNAMIC !DYNAMIC,TYPE=LINEAR | |
| Number of nodes | 525 | ||
| Number of elements | 240 | ||
| Element type | 10-node quadratic tetrahedral element | !ELEMENT,TYPE=342 | |
| Material property name | M1 | !MATERIAL,NAME=M1 | |
| Boundary conditions | Constraints, concentrated load | !CLOAD | |
| Matrix solver | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Figure 4.12.1 Geometry of the cantilever beam
Figure 4.12.2 Mesh data of the cantilever beam
Analysis Details¶
A linear dynamic analysis is performed after constraining the displacement of the constrained surface shown in Figure 4.12.1 and applying a concentrated load to the load node. The analysis control data are shown below.
Analysis Control Data beam.cnt¶
# Control File for FISTR
## Analysis Control
!VERSION
3
!WRITE,LOG,FREQUENCY=5000
!WRITE,RESULT,FREQUENCY=5000
!SOLUTION, TYPE=DYNAMIC
!DYNAMIC, TYPE=LINEAR
11 , 1
0.0, 1.0, 500000, 1.0000e-8
0.5, 0.25
1, 1, 0.0, 0.0
100000, 3121, 500
1, 1, 1, 1, 1, 1
## Solver Control
### Boundary Conditon
!BOUNDARY, AMP=AMP1
FIX, 1, 3, 0.0
!CLOAD, AMP=AMP1
CL1, 3, -1.0
### Material
# define in mesh file
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=NO,TIMELOG=NO
10000, 1
1.0e-06, 1.0, 0.0
!END
Analysis Procedure¶
Execute the FrontISTR command fistr1.
(Run with 4 threads.)
Analysis Results¶
A time-series plot of the displacement of the monitoring node specified in the analysis control data (the load node, node number 3121) is created using Microsoft Excel and shown in Figure 4.12.3. A portion of the monitoring-node displacement output file (dyna_disp_3121.txt) is also shown below as numerical analysis-result data.
Figure 4.12.3 Time-series displacement of the monitoring node
Monitoring-Node Displacement dyna_disp_3121.txt¶
0 0.0000E+000 3121 0.0000E+000 0.0000E+000 0.0000E+000
500 5.0000E-006 3121 5.3301E-005 -2.6682E-005 -1.5646E-002
1000 1.0000E-005 3121 4.0790E-005 -1.0696E-006 -4.4118E-002
1500 1.5000E-005 3121 9.1017E-005 5.7542E-005 -8.1017E-002
2000 2.0000E-005 3121 1.8944E-005 5.6499E-005 -1.2358E-001
2500 2.5000E-005 3121 3.4535E-005 6.1147E-005 -1.7787E-001
3000 3.0000E-005 3121 3.0248E-005 1.6211E-004 -2.2844E-001
3500 3.5000E-005 3121 4.2434E-005 1.1706E-004 -2.7330E-001
4000 4.0000E-005 3121 -2.0130E-005 1.2298E-004 -3.2436E-001
4500 4.5000E-005 3121 4.1976E-005 -4.2753E-005 -3.8902E-001
5000 5.0000E-005 3121 5.6526E-005 1.2043E-004 -4.6494E-001
5500 5.5000E-005 3121 1.9195E-005 8.8901E-006 -5.4673E-001
6000 6.0000E-005 3121 3.9722E-005 -8.0492E-005 -6.4665E-001
6500 6.5000E-005 3121 9.0688E-005 -1.9603E-004 -7.5697E-001
7000 7.0000E-005 3121 3.8175E-005 1.3406E-004 -8.6961E-001
7500 7.5000E-005 3121 -2.1776E-005 2.9617E-004 -9.6952E-001
8000 8.0000E-005 3121 -1.6732E-005 2.0223E-004 -1.0672E+000
8500 8.5000E-005 3121 1.0129E-004 4.9717E-004 -1.1583E+000
9000 9.0000E-005 3121 4.4797E-005 6.6073E-004 -1.2421E+000
9500 9.5000E-005 3121 -5.5023E-007 7.2865E-004 -1.3154E+000
10000 1.0000E-004 3121 4.6793E-005 3.6134E-004 -1.3947E+000
Analysis Result Log 0.log¶
fstr_setup: OK
#### Result step= 5000
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 3.5119E-02 5021 -3.5178E-02 1221
//U2 1.1456E-03 1203 -1.1672E-03 1003
//U3 0.0000E+00 1001 -4.6494E-01 3121
//V1 1.2518E+03 1001249 -1.4015E+03 1000542
//V2 3.8803E+02 5021 -3.3289E+02 1001074
//V3 4.7101E+01 1000007 -1.5435E+04 1001066
//A1 6.7723E+09 5021 -4.1214E+09 5011
//A2 4.9616E+09 3219 -1.2304E+10 1221
//A3 9.4377E+09 1221 -5.7155E+09 5121
//E11 8.0049E-03 5001 -7.9582E-03 1000367
//E22 2.8641E-03 1203 -2.2671E-03 5103
//E33 2.8794E-03 1203 -2.6589E-03 1001105
//E12 2.6224E-03 1201 -2.3782E-03 1001
//E23 8.3475E-04 1000713 -1.0763E-03 1000353
//E31 5.8002E-04 1000750 -2.3236E-03 1000368
//S11 3.7805E+01 1000738 -4.1247E+01 1201
//S22 1.4126E+01 1000738 -1.7677E+01 1201
//S33 9.6734E+00 1001098 -1.7677E+01 1201
//S12 4.0344E+00 1201 -3.6588E+00 1001
//S23 1.2842E+00 1000713 -1.6558E+00 1000353
//S31 8.9234E-01 1000750 -3.5747E+00 1000368
//SMS 3.2995E+01 1203 1.8529E-01 1000240
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 5.9346E-03 126 -5.9635E-03 61
//E22 1.6102E-03 68 -1.6304E-03 125
//E33 1.8989E-03 61 -1.9798E-03 126
//E12 8.3076E-04 62 -7.8339E-04 3
//E23 5.7501E-04 119 -6.2415E-04 178
//E31 2.5209E-04 35 -1.3096E-03 2
//S11 2.4565E+01 126 -2.6193E+01 2
//S22 5.2809E+00 183 -5.7364E+00 2
//S33 5.5451E+00 183 -5.7987E+00 2
//S12 1.2781E+00 62 -1.2052E+00 3
//S23 8.8463E-01 119 -9.6023E-01 178
//S31 3.8783E-01 35 -2.0148E+00 2
//SMS 2.3676E+01 61 1.7835E+00 179
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 3.5119E-02 5021 -3.5178E-02 1221
//U2 1.1456E-03 1203 -1.1672E-03 1003
//U3 0.0000E+00 1001 -4.6494E-01 3121
//V1 1.2518E+03 1001249 -1.4015E+03 1000542
//V2 3.8803E+02 5021 -3.3289E+02 1001074
//V3 4.7101E+01 1000007 -1.5435E+04 1001066
//A1 6.7723E+09 5021 -4.1214E+09 5011
//A2 4.9616E+09 3219 -1.2304E+10 1221
//A3 9.4377E+09 1221 -5.7155E+09 5121
//E11 8.0049E-03 5001 -7.9582E-03 1000367
//E22 2.8641E-03 1203 -2.2671E-03 5103
//E33 2.8794E-03 1203 -2.6589E-03 1001105
//E12 2.6224E-03 1201 -2.3782E-03 1001
//E23 8.3475E-04 1000713 -1.0763E-03 1000353
//E31 5.8002E-04 1000750 -2.3236E-03 1000368
//S11 3.7805E+01 1000738 -4.1247E+01 1201
//S22 1.4126E+01 1000738 -1.7677E+01 1201
//S33 9.6734E+00 1001098 -1.7677E+01 1201
//S12 4.0344E+00 1201 -3.6588E+00 1001
//S23 1.2842E+00 1000713 -1.6558E+00 1000353
//S31 8.9234E-01 1000750 -3.5747E+00 1000368
//SMS 3.2995E+01 1203 1.8529E-01 1000240
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 5.9346E-03 126 -5.9635E-03 61
//E22 1.6102E-03 68 -1.6304E-03 125
//E33 1.8989E-03 61 -1.9798E-03 126
//E12 8.3076E-04 62 -7.8339E-04 3
//E23 5.7501E-04 119 -6.2415E-04 178
//E31 2.5209E-04 35 -1.3096E-03 2
//S11 2.4565E+01 126 -2.6193E+01 2
//S22 5.2809E+00 183 -5.7364E+00 2
//S33 5.5451E+00 183 -5.7987E+00 2
//S12 1.2781E+00 62 -1.2052E+00 3
//S23 8.8463E-01 119 -9.6023E-01 178
//S31 3.8783E-01 35 -2.0148E+00 2
//SMS 2.3676E+01 61 1.7835E+00 179
...
#### Result step=500000
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 5.2758E-02 5221 -5.2989E-02 1021
//U2 1.0426E-03 1000750 -7.2090E-02 1021
//U3 0.0000E+00 1001 -6.5930E-01 3121
//V1 1.6455E+03 5217 -1.6058E+03 1019
//V2 8.7881E+02 1000132 -2.2448E+03 1221
//V3 1.9455E+02 1000003 -1.7874E+04 1221
//A1 5.7327E+09 5221 -4.0019E+09 1203
//A2 7.0089E+09 3221 -4.3280E+09 1000713
//A3 4.9140E+09 1211 -8.4702E+09 5021
//E11 1.0808E-02 1001104 -1.0904E-02 1003
//E22 3.4008E-03 1203 -3.2574E-03 5203
//E33 3.6321E-03 1103 -3.5530E-03 1001105
//E12 3.4760E-03 1201 -2.9256E-03 1001
//E23 9.1779E-04 1000017 -1.3462E-03 1001
//E31 6.4324E-04 1000750 -2.5756E-03 1101
//S11 5.0236E+01 5201 -5.2624E+01 1001
//S22 1.8815E+01 1001098 -2.2485E+01 1000008
//S33 1.2848E+01 1001098 -2.2485E+01 1000008
//S12 5.3477E+00 1201 -4.5009E+00 1001
//S23 1.4120E+00 1000017 -2.0711E+00 1001
//S31 9.8961E-01 1000750 -3.9625E+00 1101
//SMS 4.4276E+01 1003 6.5308E-01 1000690
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 8.0789E-03 186 -8.0188E-03 1001
//E22 2.1847E-03 8 -2.1148E-03 192
//E33 2.5029E-03 1001 -2.6704E-03 186
//E12 1.1765E-03 62 -1.0144E-03 3
//E23 4.9965E-04 6 -5.1495E-04 66
//E31 -1.2336E-05 125 -1.4721E-03 2
//S11 3.3432E+01 186 -3.4438E+01 2
//S22 7.0191E+00 183 -7.4671E+00 2
//S33 7.6014E+00 183 -7.7370E+00 2
//S12 1.8099E+00 62 -1.5605E+00 3
//S23 7.6870E-01 6 -7.9223E-01 66
//S31 -1.8979E-02 125 -2.2647E+00 2
//SMS 3.1742E+01 186 7.0883E-01 114
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 5.2758E-02 5221 -5.2989E-02 1021
//U2 1.0426E-03 1000750 -7.2090E-02 1021
//U3 0.0000E+00 1001 -6.5930E-01 3121
//V1 1.6455E+03 5217 -1.6058E+03 1019
//V2 8.7881E+02 1000132 -2.2448E+03 1221
//V3 1.9455E+02 1000003 -1.7874E+04 1221
//A1 5.7327E+09 5221 -4.0019E+09 1203
//A2 7.0089E+09 3221 -4.3280E+09 1000713
//A3 4.9140E+09 1211 -8.4702E+09 5021
//E11 1.0808E-02 1001104 -1.0904E-02 1003
//E22 3.4008E-03 1203 -3.2574E-03 5203
//E33 3.6321E-03 1103 -3.5530E-03 1001105
//E12 3.4760E-03 1201 -2.9256E-03 1001
//E23 9.1779E-04 1000017 -1.3462E-03 1001
//E31 6.4324E-04 1000750 -2.5756E-03 1101
//S11 5.0236E+01 5201 -5.2624E+01 1001
//S22 1.8815E+01 1001098 -2.2485E+01 1000008
//S33 1.2848E+01 1001098 -2.2485E+01 1000008
//S12 5.3477E+00 1201 -4.5009E+00 1001
//S23 1.4120E+00 1000017 -2.0711E+00 1001
//S31 9.8961E-01 1000750 -3.9625E+00 1101
//SMS 4.4276E+01 1003 6.5308E-01 1000690
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 8.0789E-03 186 -8.0188E-03 1001
//E22 2.1847E-03 8 -2.1148E-03 192
//E33 2.5029E-03 1001 -2.6704E-03 186
//E12 1.1765E-03 62 -1.0144E-03 3
//E23 4.9965E-04 6 -5.1495E-04 66
//E31 -1.2336E-05 125 -1.4721E-03 2
//S11 3.3432E+01 186 -3.4438E+01 2
//S22 7.0191E+00 183 -7.4671E+00 2
//S33 7.6014E+00 183 -7.7370E+00 2
//S12 1.8099E+00 62 -1.5605E+00 3
//S23 7.6870E-01 6 -7.9223E-01 66
//S31 -1.8979E-02 125 -2.2647E+00 2
//SMS 3.1742E+01 186 7.0883E-01 114