网格化分：CANNOT FREE MESH WITH HEXAHEDRAL ELEMENTS什么原因

heaventian

命令流如下：
/PREP7
ET,1,SOLID185
/PNUM,KP,1
/PNUM,LINE,1
/NUMBER,0
K,1,-180,0,0
K,2,-180,35,0
K,3,-135,35,0
L,1,2
L,2,3
LPLOT
CSYS,1
K,4,135,135,0
K,5,95,180,0
K,6,95,135,0
L,3,4
L,5,6
LFILLT,2,3,30
LPLOT
WPROTA,45
CSYS,4
ALLSEL
LSYMM,X,ALL
WPROTA,-45
WPOFFS,600
CSWPLA,11,1
K,16,75,0,0
K,17,75,135,0
K,18,40,0,0
K,19,40,180,0
L,16,17
L,18,19
CSYS,0
LSEL,S,,,4,6,2
LSEL,A,,,7,9,2
LSYMM,X,ALL
K,27,250,55,0
K,28,520,45,0
BSPLIN,17,28,27,24
ALLSEL
LPLOT
LFILLT,15,17,40
LFILLT,11,17,150
ALLSEL
LPLOT
LSYMM,Y,ALL
ALLSEL
NUMMRG,KP
LPLOT
LSEL,S,,,12,31,19
LPLOT
AL,ALL
LSEL,S,,,4,9,5
LSEL,A,,,13,16,3
LSEL,A,,,23,28,5
LSEL,A,,,32,35,3
LPLOT
AL,ALL
ALLSEL
LSEL,U,,,12,31,19
LSEL,U,,,4,9,5
LSEL,U,,,13,16,3
LSEL,U,,,23,28,5
LSEL,U,,,32,35,3
LPLOT
AL,ALL
APLOT
/PNUM,AREA,1
/PNUM,LINE,0
/PNUM,KP,0
/REPLOT
ASBA,3,1
ASBA,4,2
NUMCMP,ALL
APLOT
VOFFST,1,50
VIEW,1,1,2,3
VPLOT
ALLSEL
SMRT,6
MSHAPE,0,3D
MSHKEY,0
VMESH,1
SAVE
FINISH

前面建几何模型没问题，后面几行网格化分时，报：CANNOT FREE MESH WITH HEXAHEDRAL elements，请问问题出在哪里？该如何解决，

zqh1985

MSHAPE,0,3D
我想问题就是此模型不能划分为六面体单元，因为模型不是很规则。
我参照课本建立的连杆模型。仅供参考。
/prep7
et,1,42
et,2,185
mp,ex,1,2e11
mp,prxy,1,0.3
pcirc,0.1,0.140,0,180
pcirc,0.1,0.140,0,45
rectng,-0.035,0.035,0.120,0.180
rectng,-0.180,-0.120,0,0.035
aovlap,all
wpoffs,0.650
csys,4
pcirc,0.04,0.070,0,180
pcirc,0.04,0.070,0,135
aovlap,1,2
lfillt,22,31,0.030
lfillt,23,32,0.025
lfillt,28,32,0.025
al,1,3,7
al,10,35,12
al,37,38,36
csys,0
k,100,0.25,0.055,0
k,200,0.52,0.045,0
csys,1
bsplin,6,100,200,23
lstr,1,8
al,39,13,40,17
aadd,all
aesize,all,0.02
amesh,all
csys,0
type,2
extopt,esize,3
extopt,aclear,13
vext,13,,,,,0.05

heaventian

你的意思是不是说在对几何模型进行网格划分的时候，有些模型本身不规则，而六面体单元的适应能力不强，导致网格划分不成功？

韬光养晦973

提示是因为结构无法实现六面体网格划分，修改单元类型划分成四面体网格就行了