vm229的解问题

睡莲

ansys帮助中的例子vm229，我按照例子的命令做了第一步，模拟出了温度场等，但是我不能模拟出接触应力分布，这是个接触问题，应该能模拟出nodal solu—nodal solution---contact---contact pressure，为什么别的解能求出，而contact中的解求不出？是不是在接触中有些参数需要改？请求帮助！命令流如下：
/PREP7
ET,1,PLANE13,4 ! 2-D COUPLED-FIELD SOLID
RECT,,5,,1.25
RECT,,1.25,1.25,2.5
!*
LESIZE,ALL,0.25, , ,1,1
AMESH,ALL
UIMP,1,EX, , ,70000,
UIMP,1,DENS, , ,2.7E-9,
UIMP,1,ALPX, , ,23.86E-6,
UIMP,1,NUXY, , ,0.3,
UIMP,1,MU, , ,0.2,
UIMP,1,KXX, , ,150,
UIMP,1,C, , ,9E8,
TOFFSET,460
TUNIF = 0.00
ET,2,TARGE169 ! 2-D TARGET SEGMENT
ET,3,CONTA171 ! 2-D SURFACE-TO-SURFACE CONTACT
KEYOPT,3,1,1
ASEL,S,,,1
NSLA,S,1
NSEL,R,LOC,Y,1.25
R,1
TYPE,2
ESURF
ALLSEL
ASEL,S,,,2
NSLA,S,1
NSEL,R,LOC,Y,1.25
TYPE,3
ESURF
ALLSEL,ALL
*DIM,PRE,TABLE,2,1,1,TIME
!*
SFL,7,PRES, %PRE%
PRE(1,0,1) = 0
PRE(1,1,1) = 10
PRE(2,0,1) = 10
PRE(2,1,1) = 10
ALLSEL
SAVE
FINISH
/SOLU
NSUB,1
ASEL,S,,,2
NSLA,S,1
NSEL,R,LOC,X,1.25
D,ALL,UX,3.75
ALLSEL
ASEL,S,,,1
NSLA,S,1
D,ALL,UX,0
D,ALL,UY,0
ALLSEL
ANTYPE,TRANS
TIMINT,OFF,STRUC
TINTPR,,,,1.0
NLGEOM,ON
TIME,3.75E-3
AUTO,ON
NSUB,100,10000,100
OUTRES,ALL,-10
NROP,UNSYM
/OUT,SCRATCH