Tíðnisvörunargreining¶
Þessi greining notar gögnin í tutorial/17_freq_beam.
Greiningarviðfang¶
Greiningarviðfangið er innspenntur biti; rúmfræðin er sýnd á mynd 4.17.1 og möskvagögnin á mynd 4.17.2.
| Atriði | Lýsing | Athugasemdir | Tilvísun |
|---|---|---|---|
| Greiningartegund | Tíðnisvörunargreining | !SOLUTION,TYPE=EIGEN !SOLUTION,TYPE=DYNAMIC | |
| Fjöldi hnúta | 55 | ||
| Fjöldi staka | 126 | ||
| Stakategund | 4 hnúta línulegt fjórflötungsstak | !ELEMENT,TYPE=341 | |
| Efnisheiti | Material-1 | !MATERIAL,NAME=Material-1 | |
| Jaðarskilyrði | Skorðun, samþjappað álag, eiginsveiflur | !EIGENREAD | |
| Fylkjalausnir | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Greiningarlýsing¶
Endi innspennta bitans sem greina á er fullskorðaður og tíðnisvörunargreining er framkvæmd með samþjöppuðu álagi á tvo hnúta á gagnstæðum enda.
Fyrst er eiginsveiflugreining framkvæmd til og með 10. sveifluformi við sömu jaðarskilyrði og síðan er greiningin framkvæmd með eigingildum og eiginvigrum til og með 5. sveifluformi. Stýrigögn tíðnisvörunargreiningarinnar eru sýnd hér að neðan.
Stýrigögn greiningar beam_eigen.cnt¶
# Control File for FISTR
!VERSION
3
!WRITE,RESULT
!WRITE,VISUAL
!SOLUTION, TYPE=EIGEN
!EIGEN
10, 1.0E-8, 60
!BOUNDARY
_PickedSet4, 1, 3, 0.0
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=NO,TIMELOG=YES
10000, 1
1.0e-8, 1.0, 0.0
!VISUAL,method=PSR
!surface_num=1
!surface 1
!output_type=VTK
!END
Stýrigögn greiningar beam_freq.cnt¶
# Control File for FISTR
!VERSION
3
!WRITE,RESULT
!WRITE,VISUAL
!SOLUTION, TYPE=DYNAMIC
!DYNAMIC
11 , 2
14000, 16000, 20, 15000.0
0.0, 6.6e-5
1, 1, 0.0, 7.2E-7
10, 2, 1
1, 1, 1, 1, 1, 1
!EIGENREAD
eigen_0.log
1, 5
!BOUNDARY
_PickedSet4, 1, 3, 0.0
!FLOAD, LOAD CASE=2
_PickedSet5, 2, 1.
!FLOAD, LOAD CASE=2
_PickedSet6, 2, 1.
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=NO,TIMELOG=YES
10000, 1
1.0e-8, 1.0, 0.0
!VISUAL,method=PSR
!surface_num=1
!surface 1
!output_type=VTK
!END
Greiningarferli¶
Fyrst skal endurnefna alþjóðlegu stýrigagnaskrána hecmw_ctrl_eigen.dat fyrir eiginsveiflugreiningu í hecmw_ctrl.dat og framkvæma eiginsveiflugreininguna.
Næst skal endurnefna alþjóðlegu stýrigagnaskrána hecmw_ctrl_freq.dat fyrir tíðnisvörunargreiningu í hecmw_ctrl.dat og endurnefna niðurstöðuannál eiginsveiflugreiningarinnar 0.log í eigen_0.log (eins og tilgreint er í stýrigögnum tíðnisvörunargreiningarinnar) og framkvæma síðan tíðnisvörunargreininguna.
cp hecmw_ctrl_eigen.dat hecmw_ctrl.dat
fistr1 -t 4
mv 0.log eigen_0.log
cp hecmw_ctrl_freq.dat hecmw_ctrl.dat
fistr1 -t 4
Greiningarniðurstöður¶
Samband tíðni og færsluútslags vöktunarhnúts (hnútnúmer 1), sem tilgreindur er í stýrigögnunum, er sýnt á mynd 4.17.3 sem var búin til með Microsoft Excel. Hluti niðurstöðuannáls greiningarinnar er sýndur hér að neðan sem töluleg gögn fyrir greiningarniðurstöðurnar.
Niðurstöðuannáll greiningar 0.log (Tíðnisvörunargreining)¶
fstr_setup: OK
Rayleigh alpha: 0.0000000000000000
Rayleigh beta: 7.1999999999999999E-007
read from=eigen_0.log
start mode= 1
end mode= 5
start frequency: 14000.000000000000
end frequency: 16000.000000000000
number of the sampling points 20
monitor nodeid= 1
14100.000000000000 [Hz] : 8.3935554529723885E-002
14100.000000000000 [Hz] : 1 .res
14200.000000000000 [Hz] : 9.1211083509607632E-002
14200.000000000000 [Hz] : 2 .res
14300.000000000000 [Hz] : 9.9579777896922961E-002
14300.000000000000 [Hz] : 3 .res
14400.000000000000 [Hz] : 0.10914967594967491
14400.000000000000 [Hz] : 4 .res
14500.000000000000 [Hz] : 0.11992223203326918
14500.000000000000 [Hz] : 5 .res
14600.000000000000 [Hz] : 0.13164981801806747
14600.000000000000 [Hz] : 6 .res
14700.000000000000 [Hz] : 0.14360931008440975
14700.000000000000 [Hz] : 7 .res
14800.000000000000 [Hz] : 0.15436500205940235
14800.000000000000 [Hz] : 8 .res
14900.000000000000 [Hz] : 0.16180768408076251
14900.000000000000 [Hz] : 9 .res
15000.000000000000 [Hz] : 0.16388019610373711
15000.000000000000 [Hz] : 10 .res
15100.000000000000 [Hz] : 0.15982110598747551
15100.000000000000 [Hz] : 11 .res
15200.000000000000 [Hz] : 0.15074650286398145
15200.000000000000 [Hz] : 12 .res
15300.000000000000 [Hz] : 0.13885370598993371
15300.000000000000 [Hz] : 13 .res
15400.000000000000 [Hz] : 0.12618976409021948
15400.000000000000 [Hz] : 14 .res
15500.000000000000 [Hz] : 0.11405716994112736
15500.000000000000 [Hz] : 15 .res
15600.000000000000 [Hz] : 0.10306231010139058
15600.000000000000 [Hz] : 16 .res
15700.000000000000 [Hz] : 9.3374567545990342E-002
15700.000000000000 [Hz] : 17 .res
15800.000000000000 [Hz] : 8.4945897112663621E-002
15800.000000000000 [Hz] : 18 .res
15900.000000000000 [Hz] : 7.7641947016103510E-002
15900.000000000000 [Hz] : 19 .res
16000.000000000000 [Hz] : 7.1307642422355627E-002
16000.000000000000 [Hz] : 20 .res
start time: 0.0000000000000000
end time: 6.6000000000000005E-005
frequency: 15000.000000000000
node id: 1
num disp: 10
time= 0.0000000000000000 : 1 .res
time= 0.0000000000000000 : 1 .vis
time= 6.6000000000000003E-006 : 2 .res
time= 6.6000000000000003E-006 : 2 .vis
time= 1.3200000000000001E-005 : 3 .res
time= 1.3200000000000001E-005 : 3 .vis
time= 1.9800000000000000E-005 : 4 .res
time= 1.9800000000000000E-005 : 4 .vis
time= 2.6400000000000001E-005 : 5 .res
time= 2.6400000000000001E-005 : 5 .vis
time= 3.3000000000000003E-005 : 6 .res
time= 3.3000000000000003E-005 : 6 .vis
time= 3.9600000000000000E-005 : 7 .res
time= 3.9600000000000000E-005 : 7 .vis
time= 4.6200000000000005E-005 : 8 .res
time= 4.6200000000000005E-005 : 8 .vis
time= 5.2800000000000003E-005 : 9 .res
time= 5.2800000000000003E-005 : 9 .vis
time= 5.9400000000000000E-005 : 10 .res
time= 5.9400000000000000E-005 : 10 .vis