[分享]热接触分析，有APDL

huntfora

在做热接触时出现如下WARNING，
*** WARNING ***                         CP =     155.812   TIME= 22:51:22
All selected contact pairs are initially open.  Rigid body motion can   
occur.  You may use auto CNOF/ICONT by setting KEYOPT(5) to close      
small gaps.         
出现上述的WARNING,高手指点下。

算出来的结果明显不对。我是在轴向的两端加的温度载荷，但是中间的温度最低。

[ 本帖最后由 huntfora 于 2008-1-24 23:46 编辑 ]

huntfora

命令流如下：
FINISH
/CLEAR,NOSTART
/PREP7   
ET,1,SOLID70
MP,EX,1,2.1E5   
MP,PRXY,1,0.3   
CYL4,0,0,10,0,100,90,25  
CYL4,0,0,10,0,35,90,50  
VGEN,,1,,,,,-24.2,,,1  
LESIZE,17,,,10,,,,,1
LESIZE,19,,,10,,,,,1
LESIZE,18,,,2,,,,,1  
LESIZE,20,,,2,,,,,1  
LESIZE,22,,,20,,,,,1
LESIZE,5,,,10,,,,,1  
LESIZE,7,,,10,,,,,1  
LESIZE,6,,,8,,,,,1   
LESIZE,8,,,8,,,,,1   
LESIZE,10,,,3,,,,,1  
LESIZE,15,,,2,,,,,1  
LESIZE,13,,,2,,,,,1  
VSWEEP,ALL   

/COM,CONTACT PAIR CREATION-START
MAT,1
MP,KXX,1,339  
MP,DENS,1,7800
MP,C,1,1200
R,3  
REAL,3   
Et,2,170
ET,3,174
KEYOPT,3,1,2
KEYOPT,3,12,5   
!R,3,0,0,0.1, 0.1,0,0
R,3,,,
RMORE,,,, ,,
RMORE,,200,, ,0,
RMORE,,,, ,,

TYPE,2
CSYS,1
ASEL,S, , ,2
CM,_TARGET,AREA  
NSLA,S,1
NSEL,R,LOC,X,10,35  
ESLN,S,0
ESURF,ALL,

ALLSEL,ALL
TYPE,3
ASEL,S,,,7   
CM,_CONTACT,AREA  
NSLA,R,1
ESLN,S,0
ESURF,ALL,
FINISH

ALLSEL
/SOLU
DA,1,TEMP,1473  
DA,8,TEMP,1400

ANTYPE,TRANS
AUTOTS,0
TIME,100
NSUBST,100,200,100

NROPT,FULL, ,OFF
!THOPT,QUASI
EQSLV,JCG, ,1.5,  
PRECISION,0

ALLSEL,ALL
SOLVE   

/POST1
PLNSOL,TEMP

huntfora

但是在圆柱周向设置接触时得出的结果却是对的
高手指点下。

它的命令流如下：
FINISH
/CLEAR,NOSTART
/PREP7   
ET,1,SOLID70
MP,EX,1,2.1E5   
MP,PRXY,1,0.3   
CYL4,0,0,34,0,100,90,25  
CYL4,0,0,10,0,35,90,50  
VGEN,,2,,,,,-12.5,,,1  
LESIZE,17,,,15,,,,,1
LESIZE,19,,,15,,,,,1
LESIZE,18,,,2,,,,,1  
LESIZE,20,,,2,,,,,1  
LESIZE,22,,,20,,,,,1
LESIZE,5,,,10,,,,,1  
LESIZE,7,,,10,,,,,1  
LESIZE,6,,,8,,,,,1   
LESIZE,8,,,8,,,,,1   
LESIZE,10,,,3,,,,,1  
LESIZE,15,,,2,,,,,1  
LESIZE,13,,,2,,,,,1  
VSWEEP,ALL   
/COM,CONTACT PAIR CREATION-START
MP,KXX,1,339  
MAT,1   
R,3  
REAL,3   
Et,2,170
ET,3,174
KEYOPT,3,1,2
KEYOPT,3,12,5   
!R,3,0,0,0.1, 0.1,0,0
R,3,,,
RMORE,,,, ,,
RMORE,,200,, ,0,
RMORE,,,, ,,

ASEL,S,,,4   
CM,_TARGET,AREA  
TYPE,2   
NSLA,S,1
ESLN,S,0
ESURF,ALL   
ASEL,S,,,9   
CM,_CONTACT,AREA
TYPE,3   
NSLA,S,1
ESLN,S,0
ESURF,ALL   
CMDEL,_TARGET   
CMDEL,_CONTACT   
ALLSEL,ALL   
EPLOT   
FINISH   

/SOLU   
DA,3,TEMP,1473  
DA,10,TEMP,1373


ANTYPE,TRANS
AUTOTS,0
TIME,200
NSUBST,100,1000,100

NROPT,FULL, ,OFF
EQSLV,JCG, ,1.5,  
PRECISION,0

ALLSEL,ALL
SOLVE   

/POST1
PLNSOL,TEMP

huntfora

哪位指点下，有命令流的

venuswalking

可以把问题描述一下吗？