你好,我也做了一个例子,但模态 频率 太小与文献不符,请帮忙看一下,谢谢
简化,只建了罐壁做出来的
相差太大,单位也是统一的,即便简化也不该相差如此大
/prep7
!定义材料常数
ET,1,SHELL63
mp,EX,1,2.068427e11
mp,PRXY,1,0.3
mp,dens,1,7833.5
r,1,0.0254, , , , , ,
*SET,r,18.288
*SET,h,12.192
*SET,t,0.0254
K,1,0,0,0,
K,2,r,0,0,
K,3,r,h,0,
K,4,,h,0,
LSTR, 2, 3
FLST,2,1,4,ORDE,1
FITEM,2,1
FLST,8,2,3
FITEM,8,4
FITEM,8,1
AROTAT,P51X, , , , , ,P51X, ,360,4,
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM,
!*
ESIZE,0,20,
MSHAPE,0,2D
MSHKEY,0
!*
FLST,5,4,5,ORDE,2
FITEM,5,1
FITEM,5,-4
CM,_Y,AREA
ASEL, , , ,P51X
CM,_Y1,AREA
CHKMSH,'AREA'
CMSEL,S,_Y
AMESH,_Y1
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
nsel,s,loc,y,0 !底部节点ux,uy,uz约束
d,all,ux
d,all,uy
d,all,uz
acel,,,9.8
fini
/solu
antype,modal
modopt,subsp,10
mxpand,10,,,1
lumpm,on
alls
solve
FINISH
/POST1
SET,FIRST
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
SET,NEXT
PLDISP,0
!*
ANDSCL,10,0.5
按照文献中空罐公式计算后频率35-40基本符合文献的结果 |