Hi, I'm trying to use the Top-Down Substructuring method on Ansys but I cannot understand where is the problem on the code, Ansys give to me a warning that the reduction it is not possible but i cannot understand why, there is someone that can help me, please? (the code is below)




FINISH
/CLEAR
/FILNAME,FULL
/PREP7
et,1,plane42
mp,prxy,1,0.29
mp,ex,1,10000
BLC4,0,0,50,50
BLC4,0,50,50,50
amesh,all
nsel,s,loc,y,0
d,all,all
allsel
SAVE
FINISH

!GENERATION PASS
/FILNAME,GEN
/SOLU
ANTYPE,SUBSTR
SEOPT,GEN,,2
esel,s,elem,,10,18
nsle,s,all
m,all,all
/solu
solve
save
finish

!USE PASS
FINISH
/CLEAR
/FILNAME,USE
RESUME,FULL,DB
esel,s,elem,,1,9
nsle,s,all
/prep7
et,1,plane42
et,2,matrix50
type,2
se,GEN
EPLOT
FINISH
allsel
/SOLU
ANTYPE,static
nsel,s,loc,y,0
d,all,all
allsel
NSEL,S,LOC,Y,100
NSEL,R,LOC,X,0
F,ALL,FX,5
allsel
ESEL,S,TYPE,,2
SFE,ALL,1,SELV,,1
allsel
/solu
SOLVE
save

!EXPANSION PASS
FINISH
/CLEAR
/FILNAME,GEN
RESUME,FULL,DB
/SOLU
ANTYPE,SUBSTR
expass,on,yes
seexp,GEN,USE
EXPSOL,1,1
SOLVE
FINISH


thanks