请教一个面－面接触问题
我现在做了一个钻动的钻头钻岩石的受力分析，岩石固定，钻头受7t的压力和200r/min的钻速。我定义钻头为目标面，岩石为接触面，采用3D面－面接触。由于模型比较复杂，网格划分上我一直没有好的办法，四个刮刀长度不一，还要想办法只允许钻头在Y方向有位移，在X和Z方向上不会偏移。结果老是不收敛。下边是我的模型的命令流。
/BATCH
/COM,ANSYS RELEASE9.0 UP20041104 13:50:55 11/24/2006
/input,menust,tmp,'',,,,,,,,,,,,,,,,1
/GRA,POWER
/GST,ON
/PLO,INFO,3
/GRO,CURL,ON
/CPLANE,1
WPSTYLE,,,,,,,,0
/REPLOT,RESIZE
/COM,ANSYS RELEASE9.0 UP20041104 13:32:57 11/24/2006
/input,menust,tmp,'',,,,,,,,,,,,,,,,1
/GRA,POWER
/GST,ON
/PLO,INFO,3
/GRO,CURL,ON
/CPLANE,1
/REPLOT,RESIZE
WPSTYLE,,,,,,,,0
/REPLOT,RESIZE
/PREP7
!*
ET,1,SOLID92
!*
ET,2,TARGE170
!*
ET,3,CONTA174
!*
KEYOPT,1,5,2
KEYOPT,1,6,0
!*
KEYOPT,2,1,1
KEYOPT,2,2,0
KEYOPT,2,3,0
!*
KEYOPT,2,4,111111
KEYOPT,2,5,0
!*
KEYOPT,3,1,0
KEYOPT,3,2,0
KEYOPT,3,4,0
KEYOPT,3,5,3
KEYOPT,3,7,0
KEYOPT,3,8,0
KEYOPT,3,9,0
KEYOPT,3,10,1
KEYOPT,3,11,0
KEYOPT,3,12,0
!*
R,1,,,30000, 0.1,0.1,
RMORE,0.1,0.01,, ,,
RMORE,,,, ,,
RMORE,,,, ,,
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,1.1e6
MPDATA,PRXY,1,,0.0691
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,MU,1,,0.2
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,2.6e4
MPDATA,PRXY,2,,0.24
TB,DP,2,,,
TBMODIF,1,1,3
TBMODIF,1,2,45
TBMODIF,1,3,
MPTEMP,,,,,,,,
MPTEMP,1,0
K,1,0,0,,
K,2,44.56,-11.94,,
K,3,107.5,36.36,,
K,4,0,36.36,,
K,5,0,20,,
K,6,57.18,25,,
K,7,80,49.41,,
K,8,80,180,,
K,9,0,180,,
K,10,107.5,60,,
LSTR, 1, 2
LSTR, 3, 10
LSTR, 3, 4
LSTR, 4, 1
LSTR, 5, 6
LSTR, 7, 8
LSTR, 8, 9
LSTR, 9, 5
!*
L2TAN,5,6
!*
L2TAN,1,2
LDELE, 2
KDELE, 10
LPLOT
FLST,2,5,4
FITEM,2,8
FITEM,2,5
FITEM,2,9
FITEM,2,6
FITEM,2,7
AL,P51X
FLST,2,4,4
FITEM,2,4
FITEM,2,1
FITEM,2,10
FITEM,2,3
AL,P51X
FLST,2,1,5,ORDE,1
FITEM,2,1
FLST,8,2,3
FITEM,8,9
FITEM,8,5
VROTAT,P51X, , , , , ,P51X, ,360, ,
LPLOT
FLST,2,1,5,ORDE,1
FITEM,2,2
FLST,8,2,3
FITEM,8,4
FITEM,8,1
VROTAT,P51X, , , , , ,P51X, ,360, ,
LPLOT
/USER,1
/VIEW,1,0.318376480369 ,0.341225726606E-01,0.947350023372
/ANG, 1, 1.48108757190
/REPLO
/VIEW,1,0.433742317120 ,0.459994397550 ,0.774772712840
/ANG, 1, 3.38417201420
/REPLO
KWPAVE, 4
wprot,0,-90
/VIEW,1, -0.864640048957E-02,0.208684905800 ,0.977944706949
/ANG, 1,-7.04404814856
/REPLO
/FOC, 1,-9.70925176500 , 42.4445315627 , 8.67878127022
/REPLO
CSYS,4
BLC5, , ,500,500,-200
FLST,5,4,6,ORDE,2
FITEM,5,1
FITEM,5,-4
VSEL,U, , ,P51X
VPLOT
FLST,2,4,6,ORDE,2
FITEM,2,5
FITEM,2,-8
VADD,P51X
FLST,3,1,6,ORDE,1
FITEM,3,10
VGEN,2,P51X, , , , , , ,0
VSBV, 9, 10
ALLSEL,ALL
VSEL,U, , , 6
ALLSEL,ALL
VSEL,S, , , 6
ALLSEL,ALL
VSEL,U, , , 6
KWPAVE, 24
wpoff,-10
wprot,0,-90
CSYS,4
BLC5, , ,20,160,-107.5
FLST,2,2,6,ORDE,2
FITEM,2,5
FITEM,2,7
VINV,P51X
VPLOT
VOFFST,56,80, ,
FLST,2,2,6,ORDE,2
FITEM,2,5
FITEM,2,8
VADD,P51X
VPLOT
FLST,3,2,6,ORDE,2
FITEM,3,1
FITEM,3,3
VGEN,2,P51X, , , , , , ,0
VSBV, 7, 8
VPLOT
CSYS,5
FLST,3,1,6,ORDE,1
FITEM,3,9
VGEN,4,P51X, , , ,90, , ,0
VPLOT
KWPAVE, 1
wprot,0,-90,0
CSYS,4
wpoff,0,0,-50
BLC5, , ,20,60,100
VSBV, 7, 11
VPLOT
BLC5, , ,60,40,100
VSBV, 8, 7
VPLOT
BLC5, , ,70,70,100
VSBV, 9, 7
VPLOT
/VIEW,1,0.838302860588E-01, -0.993155305187 , -0.813327911660E-01
/ANG, 1, 176.871680595
/REPLO
NUMCMP,ALL
ALLSEL,ALL
请哪位大侠给我划分一下合理的网格，施加力后给我调试一下，这是我的毕业论文，真是急死我了，大家帮帮忙吧！
我的邮箱weixiuyan1981@126.com,谢谢啦！
哪位大侠给我看看吧，真是头疼啊！
加力时只要下边岩石固定，钻头顶端施加一个7吨的均匀压力，在对钻头施加角位移或是角速度，同时要考虑钻头不会在XZ面上偏移，最终要考察的是钻头的刮刀底面的受力情况。大家帮帮忙吧，谢谢啦！
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