我画出了campbel图,怎么提取临界转速呢,贴出代码和图如下
/prep7
*DIM,SPIN,,7
SPIN(1) = 0
SPIN(2) = 100000
SPIN(3) = 200000
SPIN(4) = 300000
SPIN(5) = 400000
SPIN(6) = 500000
SPIN(7) = 600000
MP,EX,1,2.11E11
MP,DENS,1,7850
MP,PRXY,1,0.3
ET,1,beam188,,,2
*DIM,DIAM,ARRAY,16
DIAM(1) = 3.0E-2
DIAM(2) = 3.0E-2
DIAM(3) = 3.4E-2
DIAM(4) = 3.4E-2
DIAM(5) = 3.4E-2
DIAM(6) = 4.1E-2
DIAM(7) = 5.8E-2
DIAM(8) = 4.4E-2
DIAM(9) = 4.2E-2
DIAM(10) = 4.0E-2
DIAM(11) = 4.1E-2
DIAM(12) = 3.4E-2
DIAM(13) = 3.4E-2
DIAM(14) = 3.4E-2
DIAM(15) = 3.2E-2
DIAM(16) = 2.5E-2
*DO,I,1,16
SECTYPE,I,BEAM,CSOLID
SECDATA,DIAM(I)/2
*ENDDO
DENS=7850
ET,2,MASS21
PI = ACOS(-1)
L1=16.5E-3
L2=13.5E-3
L3=4E-3
L4=10E-3
L5=5E-3
L6=6.5E-3
L7=3E-3
L8=6.5E-3
L9=47.2E-3
L10=5E-3
L11=20.5E-3
L12=5E-3
L13=10E-3
L14=4.8E-3
L15=6.5E-3
L16=23E-3
ET,3,COMBIN14
ET,4,COMBIN14
R,31,6.0E7
R,32,2.4E7
N,1,0
N,2,0.0165
N,3,0.03
N,4,0.034
N,5,0.044
N,6,0.049
N,7,0.0555
N,8,0.0585
N,9,0.065
N,10,0.1122
N,11,0.1172
N,12,0.1377
N,13,0.1427
N,14,0.1527
N,15,0.1575
N,16,0.164
N,17,0.187
N,18,0.034,0.01
N,19,0.034,0,0.01
N,20,0.044,0.01,0
N,21,0.0440,,0.01
N,22,0.1427,0.010,0
N,23,0.1427,0,0.01
N,24,0.1527,0.01,0
N,25,0.1527,0,0.01
TYPE,1
*DO,I,1,16 !设定随后梁单元划分将要使用的截面编号
SECNUM,I
E,I,I+1
*ENDDO
TYPE,3
REAL,31
E,4,18
E,5,20
E,13,22
E,14,24
TYPE,4
REAL,32
E,4,19
E,5,21
E,13,23
E,14,25
finish
/SOLU
D,18,,0,,25,1,UX,UY,UZ
D,4,,0,,5,1,UX
PI=ACOS(-1)
ANTYPE,MODAL
MODOPT,QRDAMP,20,,,ON
MXPAND,20
CORIOLIS,ON,,,ON
*DO,I,1,7
OMEGA,SPIN(I)*PI/30
SOLVE
*ENDDO
finish
/POST1
PRCAMP,,1,RPM
PLCAMP,,1,RPM
*GET,CRIC1,CAMP,2,VCRI
*GET,CRIC2,CAMP,4,VCRI
*GET,CRIC3,CAMP,6,VCRI
怎么提取每一阶的主振型和临界转速呢
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