求助关于惯性释放的问题

各位大神，小弟用ansys不久，遇到点问题求助

我用solid95单元建惯性释放的时候模，一个混凝土构件，由于模型较为复杂，选用自由划分网格，惯性释放的时候施加一个节点全约束之后计算总是提示约束不够，这是怎么回事？
FINISH
/CLEAR
/PREP7
*AFUN,DEG
ANGLE=175
LOCAL,12,0,,,,,,ANGLE
CSYS,12
L1=2
L2=6
L3=5
H1=4.5
H2=1.5
W1=0.6
W2=0.9
R=0.1
K,1,,L2/2
K,2,,-L2/2
K,3,H2,-L2/2
K,4,H1+H2,-L1/2
K,5,H1+H2,L1/2
K,6,H2,L2/2
*DO,I,1,5
L,I,I+1
*ENDDO
L,6,1
ANG1=ATAN(H1/(L2/2-L1/2))
DET_X1=-W1*COS(ANG1)
DET_Y1=W1*SIN(ANG1)
DET_X2=-W1*COS(ANG1)
DET_Y2=-W1*SIN(ANG1)
LSEL,S,LOC,X,0
LGEN,2,ALL,,,0.9
ALLSEL,ALL
LSEL,S,LOC,Y,-L2/2
LGEN,2,ALL,,,,0.6
ALLSEL,ALL
LSEL,S,LOC,X,H2,H1+H2-1E-6
LSEL,R,LOC,Y,-L2/2,-L1/2
LGEN,2,ALL,,,DET_X1,DET_Y1
LSEL,S,LOC,X,H1+H2
LGEN,2,ALL,,,-0.6
ALLSEL,ALL
LSEL,S,LOC,X,H2,H1+H2-1E-6
LSEL,R,LOC,Y,L1/2,L2/2
LGEN,2,ALL,,,DET_X2,DET_Y2
ALLSEL,ALL
LSEL,S,LOC,Y,L2/2
LGEN,2,ALL,,,,-0.6
ALLSEL,ALL
*GET,LINE_NUM,LINE,,COUNT
LSEL,S,LINE,,LINE_NUM-5,LINE_NUM
LCSL,ALL
NUMCMP,ALL
LDELE,6+1,6+12,1,1
NUMCMP,ALL
/PNUM,LINE,1
/PNUM,KP,1
ALLSEL,ALL
KPLOT
LPLOT
AL,1,2,3,4,5,6
AL,7,8,9,10,11,12
ASBA,1,2
APLOT
NUMCMP,ALL
*GET,AREA_NUM,AREA,,COUNT
VOFFST,AREA_NUM,-L3
KWPLAN,,KP(0,L2/2,0),KP(0,L2/2,-L3),KP(H1+H2,L1/2,0)
WPOFF,,,-1
CYL4,L3/4,H2+H1/4,R,,,,2+W1
CYL4,3*L3/4,H2+H1/4,R,,,,2+W1
ALLSEL,ALL
VSYMM,Y,2,3,1
VSEL,S,VOLU,,2,5,1
CM,DIAOHUAN,VOLU
ALLSEL,ALL
VSBV,1,DIAOHUAN,,DELETE,DELETE
NUMCMP,VOLU
WPCSYS,-1
ET,1,SOLID95
MP,EX,1,3.25E7
MP,DENS,1,2.5
MP,PRXY,1,0.3
VATT,1,,1
MSHAPE,1
SMRTSIZE,2
VMESH,ALL
FINISH
/SOLU
ALLSEL,ALL
ANTYPE,0
IRLF,1
KSEL,S,LOC,X,H1+H2
NSLK,S,1
D,ALL,ALL
ALLSEL,ALL
FCUM,ADD
LSEL,S,RADIUS,,R
NSLL,S,1
*GET,NODE_NUM,NODE,,COUNT
CSYS,0
F,ALL,FZ,-1574/NODE_NUM
ALLSEL,ALL
SOLVE