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发表于 2011-7-30 10:42:22
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来自 上海
我想施加单点频率的harmonic base motion,使用如下语句,计算的结果确不对,请问Amplitude曲线中的频率的单位是cycle/s还是rad/s啊?
*Amplitude, name=AMP-1
1., 0.03099, 19., 0.03099, 20., 13.85929, 52., 2.256129
900., 22.56129, 2000., 4.59661, 2001., 3.099
**
** BOUNDARY CONDITIONS
**
** Name: Disp-BC-1 Type: Symmetry/Antisymmetry/Encastre
*Boundary
SUPP, ZASYMM
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, perturbation
*Frequency, eigensolver=Lanczos, acoustic coupling=on, normalization=displacement, number interval=1, bias=1.
10, , , , ,
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT, mode list
1, 2, 3,
*End Step
** ----------------------------------------------------------------
**
** STEP: Step-2
**
*Step, name=Step-2, perturbation
*Steady State Dynamics
1., 10000., 20, 1.
*Modal Damping, structural
1, 10, 0.1
*BASE MOTION,DOF=2,AMPLITUDE=Amp-1,SCALE=1
*NODE PRINT,FREQUENCY=1
PU,PTU |
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