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我刚学ansys不久,现在有一问题困扰我多日,希望高手指点。
有一个细长圆柱壳体,此圆柱壳体分成两段,每段的材料不同,在段的结合处要加集中质量,我建模使用了两根梁,依次连在一起,都是用的beam188单元,选择截面形状是圆环,我试着在这两根梁共用的keypoint上加集中质量,可结果总是和没加集中质量时结果一样,我都快愁死了,那位高手快帮帮我吧!
加了集中质量的命令流如下:
/PREP7
K,1,0,0,,
K,2,4,0,,
K,3,6,0,,
K,4,3,2,,
LSTR, 1, 2
LSTR, 2, 3
!*
ET,1,BEAM188
!*
ET,2,BEAM188
!*
SECTYPE, 1, BEAM, CTUBE, qian, 0
SECOFFSET, CENT
SECDATA,0.252,0.255,30,0,0,0,0,0,0,0
SECTYPE, 2, BEAM, CTUBE, hou, 0
SECOFFSET, CENT
SECDATA,0.257,0.267,30,0,0,0,0,0,0,0
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,6.86e10
MPDATA,PRXY,1,,0.3
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,DENS,1,,3700
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,2.058e11
MPDATA,PRXY,2,,0.3
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,DENS,2,,10000
CM,_Y,LINE
LSEL, , , , 1
CM,_Y1,LINE
CMSEL,S,_Y
!*
!*
CMSEL,S,_Y1
LATT,1, ,1, , 4, ,1
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
CM,_Y,LINE
LSEL, , , , 2
CM,_Y1,LINE
CMSEL,S,_Y
!*
!*
CMSEL,S,_Y1
LATT,2, ,2, , 4, ,2
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
!*
ET,3,MASS21
!*
!*
!*
R,1,500, , , , , ,
!*
CM,_Y,KP
KSEL, , , , 2
CM,_Y1,KP
CMSEL,S,_Y
!*
CMSEL,S,_Y1
KATT, 1, 1, 3, 0
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
FLST,5,2,4,ORDE,2
FITEM,5,1
FITEM,5,-2
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1,0.05, , , , , , ,1
!*
FLST,2,2,4,ORDE,2
FITEM,2,1
FITEM,2,-2
LMESH,P51X
FINISH
/SOL
!*
ANTYPE,2
MSAVE,0
!*
MODOPT,LANB,20
EQSLV,SPAR
MXPAND,20, , ,0
LUMPM,0
PSTRES,0
!*
MODOPT,LANB,20,0,1000, ,OFF
/STATUS,SOLU
SOLVE
FINISH
/POST1
SET,LIST |