这样理解弹性约束对吗
我在这个问题上已经迷惑了很久，就是没有人给指点，如图所示，在物体下面有三个弹簧约束，上部受力。我对弹性约束的理解如下，首先把与底部接触弹簧的部位用耦合命令耦合，然后，用两节点建立弹簧单元。但怎么弄都觉得不对。请大家指点。或许对你们来说不屑一看，但是我非常想知道。希望给指点，谢谢啊！
我的命令流入下：
/BATCH
/COM,ANSYS RELEASE 10.0 UP20050718 18:03:39 05/20/2013
/PREP7
!*
ET,1,PLANE42
!*
ET,2,COMBIN14
!*
KEYOPT,2,1,0
KEYOPT,2,2,3
KEYOPT,2,3,0
!*
R,1,20, , ,
!*
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,2E11
MPDATA,PRXY,1,,0.3
CYL4,0,0,20
K,10,0,0,0,
K,11,0,0,2,
/VIEW,1,1
/ANG,1
/REP,FAST
LSTR, 10, 11
LPLOT
GPLOT
APLOT
/VIEW,1,,,1
/ANG,1
/REP,FAST
/VIEW,1,1,2,3
/ANG,1
/REP,FAST
CM,_Y,AREA
ASEL, , , , 1
CM,_Y1,AREA
CMSEL,S,_Y
!*
CMSEL,S,_Y1
AATT, 1, 1, 1, 0,
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
FLST,2,1,5,ORDE,1
FITEM,2,1
AESIZE,P51X,1,
MSHAPE,0,2D
MSHKEY,1
!*
CM,_Y,AREA
ASEL, , , , 1
CM,_Y1,AREA
CHKMSH,'AREA'
CMSEL,S,_Y
!*
AMESH,_Y1
!*
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
!*
LPLOT
CM,_Y,LINE
LSEL, , , , 5
CM,_Y1,LINE
CMSEL,S,_Y
!*
!*
CMSEL,S,_Y1
LATT,1,1,2, , , ,
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
FLST,5,1,4,ORDE,1
FITEM,5,5
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1,1, , , , , , ,1
!*
LMESH, 5
/UI,MESH,OFF
/VIEW,1,,1
/ANG,1
/REP,FAST
NPLOT
/VIEW,1,1,2,3
/ANG,1
/REP,FAST
/VIEW,1,1
/ANG,1
/REP,FAST
NLIST,ALL, , , ,NODE,NODE,NODE
/VIEW,1,1,2,3
/ANG,1
/REP,FAST
LPLOT
LSEL,S, , , 5
LPLOT
NSLL,R,1
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
!*
ALLSEL,ALL
NPLOT
/VIEW,1,,1
/ANG,1
/REP,FAST
FLST,4,11,1
FITEM,4,1090
FITEM,4,38
FITEM,4,462
FITEM,4,35
FITEM,4,425
FITEM,4,482
FITEM,4,300
FITEM,4,23
FITEM,4,423
FITEM,4,614
FITEM,4,40
CP,1,ALL,P51X
/VIEW,1,1,2,3
/ANG,1
/REP,FAST
APLOT
FINISH
/SOL
!*
ANTYPE,0
FLST,2,1,1,ORDE,1
FITEM,2,1090
/VIEW,1,,1
/ANG,1
/REP,FAST
NPLOT
FLST,2,1,1,ORDE,1
FITEM,2,1091
!*
/GO
D,P51X, , , , , ,ALL, , , , ,
/VIEW,1,,1
/ANG,1
/REP,FAST
/VIEW,1,-1
/ANG,1
/REP,FAST
/VIEW,1,,,-1
/ANG,1
/REP,FAST
APLOT
FLST,2,1,5,ORDE,1
FITEM,2,1
/GO
!*
SFA,P51X,1,PRES,30
/STATUS,SOLU
SOLVE
FINISH
/POST1
SET,FIRST
FINISH
/SOL
/STATUS,SOLU
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