帮忙看下错误提示
*** WARNING *** CP = 7.266 TIME= 14:19:07Element 4 has a diameter to thickness ratio less than 20.The assumed
thin-walled pipe theory may not be valid.
Check real constant table 1.
*** ERROR *** CP = 7.266 TIME= 14:19:07
Element 4 has a subtended angle that is too large.
Check node locations and third constant in real constant table 1. 命令流如下：
/PREP7
ET,1,PIPE60
R,1,57,3.5,150,
MP,EX,1,,2e11
MP,PRXY,1,,0.3
MP,DENS,1,,7850
ET,2,PIPE16
R,2,57,3.5,0,0,0,1142,
N,1,,,,,,,
N,2,,200,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
FLST,2,2,1
FITEM,2,1
FITEM,2,2
NWPAVE, 2
N,3,,112,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
FLST,2,2,1
FITEM,2,2
FITEM,2,3
NWPAVE, 3
N,4,150,0,,,,,
N,5,229.18,127.4,,,,,
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM,
TSHAP,ARC
FLST,2,3,1
FITEM,2,3
FITEM,2,5
FITEM,2,4
NWPAVE, 5
N,6,500,-310.77,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
FLST,2,2,1
FITEM,2,5
FITEM,2,6
NWPAVE, 6
N,7,-79.18,-127.4,,,,,
NWPAVE, 7
N,8,150,0,,,,,
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM,
TSHAP,ARC
FLST,2,3,1
FITEM,2,6
FITEM,2,8
FITEM,2,7
NWPAVE, 8
N,9,0,-12000,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
FLST,2,2,1
FITEM,2,8
FITEM,2,9
NWPAVE, 9
N,10,150,0,,,,,
N,11,150,-150,,,,,
TYPE, 1
MAT, 1
REAL, 1
ESYS, 0
SECNUM,
TSHAP,ARC
FLST,2,3,1
FITEM,2,9
FITEM,2,11
FITEM,2,10
NWPAVE, 11
N,12,1000,0,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
FLST,2,2,1
FITEM,2,11
FITEM,2,12
NWPAVE, 12
N,12,200,0,,,,,
TYPE, 2
MAT, 1
REAL, 2
ESYS, 0
SECNUM,
TSHAP,LINE
N,13,0,0,,,,,
FLST,2,2,1
FITEM,2,13
FITEM,2,12
CSYS,0
WPAVE,0,0,0
SAVE
FINISH
/SOL
FLST,2,1,1,ORDE,1
FITEM,2,13
D,P51X, , , , , ,UX,UY,UZ,ROTX,ROTY,ROTZ
FLST,2,1,1,ORDE,1
FITEM,2,2
D,P51X, , , , , ,UX,UY,UZ,ROTX,ROTY,ROTZ
FLST,2,1,1,ORDE,1
FITEM,2,2
D,P51X, ,-7, , , ,UY, , , , ,
GPLOT
/STATUS,SOLU
SOLVE
我想用pipe16和pipe60做管道的应力分析，但是用pipe60做弯管时，如果弯管的角度大于90°，就会有错误提示显示角度过大，但是我又不知道大于90°的角度要用哪个pipe元素，哪位高手指点下哈！
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