Linear Dynamic Analysis¶
Use the data in tutorial/12_dynamic_beam.
Analysis Target¶
The analysis target is a cantilever beam. Figure 4.12.1 shows the geometry, and Figure 4.12.2 shows the mesh.
| Item | Description | Notes | Reference |
|---|---|---|---|
| Analysis type | 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 name | M1 | !MATERIAL,NAME=M1 | |
| Boundary conditions | Restraint, concentrated load | !CLOAD | |
| Matrix solver | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Figure 4.12.1: Shape of the cantilever beam
Figure 4.12.2: Mesh data of the cantilever beam
Analysis Setup¶
Perform a linear dynamic analysis by restraining displacement on 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 Condition
!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¶
Run fistr1.
(Run with 4 threads.)
Analysis Results¶
Figure 4.12.3 shows the displacement time history at the monitoring node (load node, node 3121) specified in the Analysis Control Data, plotted using Microsoft Excel. An excerpt from the monitoring-node displacement output file (dyna_disp_3121.txt) is shown below as numerical output.
Figure 4.12.3: Displacement time history at the monitoring node
Displacement of monitoring node 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