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请问,我用aba做建筑结构的反应谱分析时,遇到以下问题而aborted了,提示:FREQUENCY MUST BE INCREASING CONTINUOUSLY IN A SPECTRUM DEFINITION
以下是我的inp文件,望知情人解惑,非常感谢
===================================================================
** BOUNDARY CONDITIONS
**
** Name: BC-base Type: Displacement/Rotation
*Boundary
base, 1, 1
base, 2, 2
base, 3, 3
base, 4, 4
base, 5, 5
base, 6, 6
*Spectrum,type=acceleration,name=specx
0.259957 , 0.17844 , 0
0.259978 , 0.17846 , 0
0.365685 , 0.4108 , 0
0.436472 , 0.64902 , 0
0.436570 , 0.64918 , 0
0.777663 , 1.2207 , 0
0.838255 , 1.3251 , 0
0.838544 , 1.3256 , 0
1.232381 , 2.0198 , 0
1.233162 , 2.0212 , 0
1.242865 , 2.0386 , 0
1.414483 , 2.3484 , 0
1.672100 , 2.82 , 0
1.692225 , 3.0166 , 0
1.692225 , 3.0195 , 0
1.692225 , 3.6533 , 0
1.692225 , 3.6546 , 0
1.692225 , 3.9246 , 0
1.692225 , 3.9917 , 0
1.692225 , 3.9965 , 0
1.692225 , 4.7342 , 0
1.692225 , 4.9261 , 0
1.692225 , 4.9351 , 0
1.692225 , 5.0514 , 0
1.692225 , 5.237 , 0
1.692225 , 5.5755 , 0
1.692225 , 5.8006 , 0
1.692225 , 5.8055 , 0
1.692225 , 6.1779 , 0
1.692225 , 6.178 , 0
** ----------------------------------------------------------------
**
** STEP: mode
**
*Step, name=mode, perturbation
*Frequency, eigensolver=Lanczos, acoustic coupling=on, normalization=displacement, number interval=1, bias=1.
30, , , , ,
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT
*End Step
** ----------------------------------------------------------------
**
** STEP: specx
**
*Step, name=specx, perturbation
*Response spectrum, sum=SRSS
specx,1., 0., 0., 1.
*Modal Damping
1, 30, 0.04
**
** OUTPUT REQUESTS
**
**
** FIELD OUTPUT: F-Output-2
**
*Output, field, variable=PRESELECT
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step |
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