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不知道为什么前两阶频率很低,而且改变弹簧刚度,前两阶频率不变。请指教,谢谢!命令流如下:
/PREP7
!*
ET,1,BEAM188
!*
ET,2,COMBI214
!*
SECTYPE, 1, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.012,0.023,20,0,0,0,0,0,0,0,0,0
SECTYPE, 2, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0085,0.023,20,0,0,0,0,0,0,0,0,0
SECTYPE, 3, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0085,0.025,20,0,0,0,0,0,0,0,0,0
SECTYPE, 4, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.01125,0.025,20,0,0,0,0,0,0,0,0,0
SECTYPE, 5, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0085,0.025,20,0,0,0,0,0,0,0,0,0
SECTYPE, 6, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.00515,0.025,20,0,0,0,0,0,0,0,0,0
SECTYPE, 7, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.00515,0.0275,20,0,0,0,0,0,0,0,0,0
SECTYPE, 8, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0033,0.0275,20,0,0,0,0,0,0,0,0,0
SECTYPE, 9, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0033,0.0265,20,0,0,0,0,0,0,0,0,0
SECTYPE, 10, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0085,0.0265,20,0,0,0,0,0,0,0,0,0
SECTYPE, 11, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0085,0.0365,20,0,0,0,0,0,0,0,0,0
SECTYPE, 12, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0115,0.0365,20,0,0,0,0,0,0,0,0,0
SECTYPE, 13, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0115,0.0265,0,0,0,0,0,0,0,0,0,0
SECTYPE, 14, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0115,0.0225,20,0,0,0,0,0,0,0,0,0
SECTYPE, 15, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0135,0.0225,20,0,0,0,0,0,0,0,0,0
SECTYPE, 16, BEAM, CTUBE, , 0
SECOFFSET, CENT
SECDATA,0.0145,0.0225,20,0,0,0,0,0,0,0,0,0
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,2.1E11
MPDATA,PRXY,1,,0.3
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,DENS,1,,7850
R,1,5E7,5E7, , , , ,
RMORE, , ,
!*
N,1,,,,,,,
N,2,0.0165,,,,,,
N,3,0.025,,,,,,
N,4,0.030,,,,,,
N,5,0.037,,,,,,
N,6,0.043,,,,,,
N,7,0.059,,,,,,
N,8,0.0625,,,,,,
N,9,0.065,,,,,,
N,10,0.0655,,,,,,
N,11,0.077,,,,,,
N,12,0.0815,,,,,,
N,13,0.082,,,,,,
N,14,0.102,,,,,,
N,15,0.122,,,,,,
N,16,0.142,,,,,,
N,17,0.162,,,,,,
N,18,0.182,,,,,,
N,19,0.198,,,,,,
N,20,0.2145,,,,,,
N,21,0.230,,,,,,
N,22,0.245,,,,,,
N,23,0.260,,,,,,
N,24,0.263,,,,,,
N,25,0.276,,,,,,
N,26,0.278,,,,,,
N,27,0.298,,,,,,
N,28,0.3245,,,,,,
N,29,0.334,,,,,,
NPLOT
NPLOT
/PNUM,KP,0
/PNUM,LINE,0
/PNUM,AREA,0
/PNUM,VOLU,0
/PNUM,NODE,1
/PNUM,TABN,0
/PNUM,SVAL,0
/NUMBER,0
!*
/PNUM,ELEM,0
/REPLOT
!*
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 1
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,1
FITEM,2,2
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 2
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,2
FITEM,2,3
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 3
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,3
FITEM,2,4
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 4
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,4
FITEM,2,5
E,P51X
FLST,2,2,1
FITEM,2,5
FITEM,2,6
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 5
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,6
FITEM,2,7
E,P51X
FLST,2,2,1
FITEM,2,7
FITEM,2,8
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 6
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,8
FITEM,2,9
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 7
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,9
FITEM,2,10
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 8
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,10
FITEM,2,11
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 9
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,11
FITEM,2,12
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 10
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,12
FITEM,2,13
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 11
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,13
FITEM,2,14
E,P51X
FLST,2,2,1
FITEM,2,14
FITEM,2,15
E,P51X
FLST,2,2,1
FITEM,2,15
FITEM,2,16
E,P51X
FLST,2,2,1
FITEM,2,16
FITEM,2,17
E,P51X
/DIST,1,1.37174211248,1
/REP,FAST
/DIST,1,1.37174211248,1
/REP,FAST
/DIST,1,1.37174211248,1
/REP,FAST
FLST,2,2,1
FITEM,2,17
FITEM,2,18
E,P51X
FLST,2,2,1
FITEM,2,18
FITEM,2,19
E,P51X
FLST,2,2,1
FITEM,2,19
FITEM,2,20
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 12
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,20
FITEM,2,21
E,P51X
FLST,2,2,1
FITEM,2,21
FITEM,2,22
E,P51X
FLST,2,2,1
FITEM,2,22
FITEM,2,23
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 13
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,23
FITEM,2,24
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 14
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,24
FITEM,2,25
E,P51X
FLST,2,2,1
FITEM,2,25
FITEM,2,26
E,P51X
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 15
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,26
FITEM,2,27
E,P51X
FLST,2,2,1
FITEM,2,27
FITEM,2,28
E,P51X
/AUTO,1
/REP,FAST
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM, 16
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,28
FITEM,2,29
E,P51X
N,101,0.037,0.036,,,,,
N,103,0.059,0.036,,,,,
N,104,0.276,0.034,,,,,
N,105,0.298,0.034,,,,,
TYPE, 2
MAT, 1
REAL, 1
ESYS, 0
SECNUM, ,
TSHAP,LINE
!*
FLST,2,2,1
FITEM,2,5
FITEM,2,101
E,P51X
FLST,2,2,1
FITEM,2,7
FITEM,2,103
E,P51X
FLST,2,2,1
FITEM,2,25
FITEM,2,104
E,P51X
FLST,2,2,1
FITEM,2,27
FITEM,2,105
E,P51X
/AUTO,1
/REP,FAST
FINISH
/SOL
FLST,2,4,1,ORDE,3
FITEM,2,101
FITEM,2,103
FITEM,2,-105
!*
/GO
D,P51X, , , , , ,ALL, , , , ,
FLST,2,34,1,ORDE,4
FITEM,2,1
FITEM,2,-29
FITEM,2,101
FITEM,2,-105
!*
/GO
D,P51X, , , , , ,UX,ROTX, , , ,
!*
ANTYPE,2
!*
!*
MODOPT,LANB,20
EQSLV,SPAR
MXPAND,20, , ,0
LUMPM,0
PSTRES,0
!*
MODOPT,LANB,20,0,0, ,OFF
/STATUS,SOLU
SOLVE
FINISH
/POST1
SET,LIST
SET,LIST
SAVE
FINISH
! /EXIT,ALL
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