自由落体算例运行不了

ksun

我在做一个车轮自由落体的分析计算，但严格按照帮助文件的过程做了之后总是不能正常运行，不知是什么原因。  
    车轮用solid164，中心离地面200mm，有初速度，大约3.3万个单元，地面按照帮助的说明为一个单元，尺寸为500x500（这个尺寸是否大了呢？），刚性。  
    solve后提示大概为 ansys执行了错误操作，将要被windows关闭，正在创建错误文件。 但错误文件里并没有什么有用的信息，只有两个警告  
    “*** WARNING *** CP= 3.141 TIME= 20:39:08  
Meshes made up of 10 percent or more of SOLID164 tetrahedra are not  
recommended.  
  
*** WARNING *** CP= 3.594 TIME= 20:39:14  
No constraints have been defined using the D command. ”  
    我现在比较急，大家能否指导一下？

ksun

命令流文件如下：
/BATCH   
/COM,ANSYS RELEASE  8.0    UP20030930       21:36:38    06/23/2004
RESUME,'FreeDrop-Spokes-model','db','.'  
/COM,ANSYS RELEASE  8.0    UP20030930       21:36:38    06/23/2004
!*   
/NOPR   
/PMETH,OFF,0
KEYW,PR_SET,1   
KEYW,PR_STRUC,1  
KEYW,PR_THERM,0  
KEYW,PR_FLUID,0  
KEYW,PR_ELMAG,0  
KEYW,MAGNOD,0   
KEYW,MAGEDG,0   
KEYW,MAGHFE,0   
KEYW,MAGELC,0   
KEYW,PR_MULTI,0  
KEYW,PR_CFD,0   
KEYW,LSDYNA,1   
/GO  
!*   
/COM,   
/COM,Preferences for GUI filtering have been set to display:
/COM,  Structural with LS-DYNA Explicit  
!*   
/PREP7   
!*   
ET,1,SOLID168   
!*   
ETDEL,1  
!*   
!*   
/NOPR   
/PMETH,OFF,0
KEYW,PR_SET,1   
KEYW,PR_STRUC,1  
KEYW,PR_THERM,0  
KEYW,PR_FLUID,0  
KEYW,PR_ELMAG,0  
KEYW,MAGNOD,0   
KEYW,MAGEDG,0   
KEYW,MAGHFE,0   
KEYW,MAGELC,0   
KEYW,PR_MULTI,0  
KEYW,PR_CFD,0   
KEYW,LSDYNA,1   
/GO  
!*   
/COM,   
/COM,Preferences for GUI filtering have been set to display:
/COM,  Structural with LS-DYNA Explicit  
!*   
!*   
ET,168,SOLID168  
!*   
ET,163,SHELL163  
!*   
KEYOPT,163,1,7   
KEYOPT,163,2,0   
KEYOPT,163,3,0   
KEYOPT,163,4,0,  
!*   
*SET,_RC_SET,163,   
R,163   
RMODIF,163,1, ,3,0.1,0.1,0.1,0.1,   
RMODIF,163,7, 0  
!*   
!*   
EDMP,RIGI,163,7,7   
MP,DENS,163,2.4e-6   
MP,EX,163,3.4e4  
MP,NUXY,163,0.167   
MP,DENS,168,2.78e-6  
MP,EX,168,7.3e4  
MP,NUXY,168,0.3  
TB,BKIN,168,,,,  
TBDAT,1,56   
TBDAT,2,114  
!*   
!*   
FINISH   
/FILNAME,FreeDrop-Spokes-168,0   
!*   
/TITLE,Drop freely,h=200mm,v0=5250,168   
SAVE
/PREP7   
TYPE, 168   
MAT,     168
REAL,     163   
ESYS,       0   
SECNUM,  
!*   
ESIZE,5,0,   
MSHAPE,1,3D  
MSHKEY,0
!*   
CM,_Y,VOLU   
VSEL, , , ,       1  
CM,_Y1,VOLU  
CHKMSH,'VOLU'   
CMSEL,S,_Y   
!*   
VMESH,_Y1   
!*   
CMDELE,_Y   
CMDELE,_Y1   
CMDELE,_Y2   
!*   
SAVE
N, ,-250,-200,-250,,,,   
N, ,-250,-200,250,,,,   
N, ,250,-200,250,,,,
N, ,250,-200,-250,,,,   
/AUTO,1  
/REP,FAST   
TYPE, 163   
MAT,     163
REAL,     163   
ESYS,       0   
SECNUM,  
!*   
FLST,2,4,1   
FITEM,2,65647   
FITEM,2,65648   
FITEM,2,65649   
FITEM,2,65650   
E,P51X   
EPLOT   
SAVE
ESEL,S,MAT,,168  
NSLE,S   
CM,pulley,NODE   
NPLOT   
ALLSEL,ALL   
NSEL,ALL
ALLSEL,ALL   
ESEL,S,MAT,,163  
NSLE,S   
NPLOT   
CM,ground,NODE   
ALLSEL,ALL   
EPLOT   
SAVE
!*   
EDCGEN,ASTS,PULLEY,GROUND,0,0,0,0,0, , , , ,0,10000000   
!*   
SAVE
FINISH   
/SOL
!*   
EDVE,VELO,PULLEY,0,-5250,0,0,0,0, , , , , ,  
*DIM,time,ARRAY,2,1,1, , ,   
!*   
*SET,TIME(2,1,1) , 1
*DIM,accg,ARRAY,2,1,1, , ,   
!*   
*SET,ACCG(1,1,1) , 9800  
*SET,ACCG(2,1,1) , 9800  
EDLOAD,ADD,ACLY,0,PULLEY,TIME,ACCG, 0, , , , ,   
TIME,1.0,   
EDRST,100,   
EDHTIME,250,
EDDUMP,1,   
!*   
EDENERGY,1,1,1,1
ALLSEL,ALL   
SAVE
/STATUS,SOLU
SOLVE   

ksun

错误文件内容：
  
/COM,ANSYS RELEASE  8.0    UP20030930       21:36:38    06/23/2004
  
  *** WARNING ***                         CP=      7.031   TIME= 21:40:54
  This function requires that files currently open be closed.              
  Executing the function will exit the preprocessor.                       
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.2 degrees
    with facet at kp   1548
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.8 degrees
    with facet at line  625
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 2.4 degrees
    with facet at line  635
  Sharp angle warning:
    triangle facets defined at line  598 form an angle of 1.2 degrees
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.8 degrees
    with facet at line  670
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 2.4 degrees
    with facet at line  680
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.1 degrees
    with facet at kp   1518
  Sharp angle warning:
    triangle facets defined at line  598 form an angle of 2.3 degrees
  Sharp angle warning:
    triangle facets defined at line  598 form an angle of 1.7 degrees
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.1 degrees
    with facet at kp   1653
  Sharp angle warning:
    triangle facets defined at line  599 form an angle of 2.3 degrees
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.7 degrees
    with facet at line  686
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.8 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 2.3 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 2.4 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.7 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.1 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  598 forms an angle of 1.2 degrees
    with facet at area  973
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.8 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 2.3 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 2.4 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.7 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.1 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facet defined at line  599 forms an angle of 1.2 degrees
    with facet at area  974
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 2.4 degrees
  Sharp angle warning:
    triangle facet defined at line  694 forms an angle of 1.8 degrees
    with facet at line  715
  Sharp angle warning:
    triangle facet defined at line  693 forms an angle of 1.2 degrees
    with facet at line  725
  Sharp angle warning:
    triangle facet defined at line  693 forms an angle of 2.4 degrees
    with facet at line  750
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.8 degrees
  Sharp angle warning:
    triangle facet defined at line  694 forms an angle of 1.2 degrees
    with facet at kp   2008
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 1.7 degrees
  Sharp angle warning:
    triangle facet defined at line  694 forms an angle of 2.3 degrees
    with facet at line  709
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.1 degrees
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.7 degrees
  Sharp angle warning:
    triangle facet defined at line  693 forms an angle of 2.3 degrees
    with facet at line  754
  Sharp angle warning:
    triangle facet defined at line  694 forms an angle of 1.1 degrees
    with facet at line  779
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.2 degrees
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.1 degrees
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 1.7 degrees
  Sharp angle warning:
    triangle facets defined at line  693 form an angle of 2.4 degrees
  Sharp angle warning:
    triangle facet defined at line  693 forms an angle of 2.3 degrees
    with facet at line   28
  Sharp angle warning:
    triangle facet defined at line  693 forms an angle of 1.8 degrees
    with facet at line   28
  Sharp angle warning:
    triangle facet defined at line  694 forms an angle of 1.2 degrees
    with facet at line   29
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 1.1 degrees
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 1.7 degrees
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 2.4 degrees
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 2.3 degrees
  Sharp angle warning:
    triangle facets defined at line  694 form an angle of 1.8 degrees
  
  *** WARNING ***                         CP=     16.625   TIME= 21:47:22
  48 angles less than 2.5 degrees found in triangle facets of volume 1,   
  with smallest angle = 1.1 degrees.  Poor element quality or mesh         
  failure may result.  A smaller element size specification may give      
  better results.                                                         
  
  *** WARNING ***                         CP=     20.031   TIME= 21:47:26
  Mid-nodes of some elements have been modified to lie on straight edges   
  because of distortion with the original mid-nodes.  This condition is   
  sometimes eliminated by tetrahedron element improvement when enabled.   
  Issue ESEL,,STRAIGHTENED to select such elements for listing or         
  plotting.                                                               
  
  *** WARNING ***                         CP=     54.859   TIME= 21:48:01
  Shape testing revealed that 17 of the 31120 new or modified elements     
  violate shape warning limits.  To review test results, please see the   
  output file or issue the CHECK command.                                 
  
  *** WARNING ***                         CP=     68.656   TIME= 21:57:16
  Previous testing revealed that 17 of the 31121 selected elements         
  violate shape warning limits.  To review warning messages, please see   
  the output or error file, or issue the CHECK command.                    
  
  *** WARNING ***                         CP=     68.828   TIME= 21:57:18
  No constraints have been defined using the D command.

ksun

我实在是查不出原因了，这几天又出现了这个错误。是否有人能帮助我一下？

st_knight

大概网格划分有问题，不合格的网格太多。

bao2002

建议重新划分网格，一般网格质量对求解影响很大
最好划得均匀点
采用六面体单元