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这是一个分析充液双层壳的模态分析模型,两端简支。
/prep7
et,1,shell63
et,2,fluid30
r,1,0.005
mp,ex,1,1.92e11
mp,prxy,1,0.3
mp,dens,1,7800
mp,sonc,2,1400
mp,dens,2,1000
cyl4,,,0.06,,0.1
l,1,6
l,2,8
l,3,7
l,4,5
lsel,s,,,9
lsel,a,,,10
lsel,a,,,11
lsel,a,,,12
cm,sublines,line
asbl,1,sublines
numcmp,all
csys,1
lsel,s,loc,x,0.06
lsel,a,loc,x,0.1
lesize,all,,,10
lsel,s,loc,x,0.08
lesize,all,,,3
allsel
type,1
mat,1
real,1
amesh,all
csys,0
k,20,
k,21,0,0,1
l,20,21
esize,0.02
type,2
mat,2
vdrag,1,2,3,4,,,13
csys,1
asel,s,loc,x,0.06
asel,a,loc,x,0.1
asel,a,loc,z,1
asel,a,loc,z,0
cm,fsi,area
type,1
mat,1
amesh,all
csys,0
allsel
finish
/solu
antype,2
modopt,unsym,10
eqslv,front
mxpand,10,,,1
nsel,s,loc,z,0
nsel,a,loc,z,1
d,all,,0,,,,ux,uy,uz
allsel
sfa,fsi,,fsi
allsel
solve
finish
执行之后出现的警告和提示:
*** WARNING *** CP = 293.000 TIME= 12:22:08
Real constant 1 referenced by at least element types 1 and 2.
*** WARNING *** CP = 320.641 TIME= 12:22:41
Coefficient ratio exceeds 1.0e8 - Check results.
*** WARNING *** CP = 525.703 TIME= 12:26:12
There are 1 positive pivots with ratios less than 1.E-13 indicating a
possible poorly conditioned stiffness matrix.
*** WARNING *** CP = 570.250 TIME= 12:27:24
Lanczos recursions terminated after 3 vectors. Apply a new shift
(FREQB) using MODOPT command and re-run for additional eigenvalues of
the problem.
*** WARNING *** CP = 570.250 TIME= 12:27:24
There are no solutions in the selected range.
*** ERROR *** SUPPRESSED MESSAGE CP = 570.250 TIME= 12:27:29
Mode file does not exist.
不知道出了什么问题,怎么得不到结果。。。。 |