! 6.5 两边简支开口柱壳在集中力作用下的大变形曲屈
! 本程序来源于邢静忠编著的《ANSYS应用实例与分析》,科学出版社,2006年
!
FINISH
/CLEAR, NOSTART
! (1)设置工程选项、分析类型、实常数、材料参数
/FILNAME, EX6.5
/PREP7
SMRT, OFF
/TITLE, EX6.5, SNAP-THROUGH BUCKLING OF A HINGED SHELL.
ANTYPE, STATIC
ET, 1, SHELL63, , 1
R, 1, 6.350
MP, EX, 1, 3120.75
MP, NUXY, 1, 0.3
! (2)定义节点、关键点、面, 并将面剖分为面单元
R1 = 2540
L = 254
PI = 4*ATAN(1)
THETA = 0.1*180/PI
CSYS, 1
N, 1, R1, 90
N, 2, R1, 90, L
K, 1, R1, 90
K, 2, R1, (90-THETA)
K, 3, R1, 90, L
K, 4, R1, (90-THETA), L
ESIZE, , 2
A, 1, 3, 4, 2
/View, 1, 1, 1, 1
/PNUM, NODE, 1
AMESH, 1
NUMMRG, NODE
EPLOT
! (3)施加位移边界条件
NSEL, S, LOC, Z, 0
DSYM, SYMM, Z
NSEL, S, LOC, Y, 90
DSYM, SYMM, X
NSEL, S, LOC, Y, (90-THETA)
D, ALL, UX, , , , , UY, UZ
NSEL, ALL
F, 1, FY, -250
FINISH
! (4)在求解模块定义荷载后求解
/OUTPUT, SCRATCH
/SOLU
NLGEOM, ON
OUTRES, , 1
NSUBST, 30
ARCLEN, ON, 4
SOLVE
FINISH
/OUTPUT
! (5)在时间历程后处理模块, 处理位移计算结果
/POST26
NSOL, 2, 1, U, Y
NSOL, 3, 2, U, Y
PROD, 4, 1, , , LOAD, , , 4*250
PROD, 5, 2, , , , , , -1
PROD, 6, 3, , , , , , -1
*GET, UY1, VARI, 2, EXTREM, VMIN
*GET, UY2, VARI, 3, EXTREM, VMIN
*STATUS, PARM
! (6)在时间历程后处理模块, 会替荷载-变形曲线
PRVAR, 2, 3, 4
/AXLAB, X, DEFLECTION (MM)
/AXLAB, Y, TOTAL LOAD (N)
/GRID, 1
/XRANGE, 0, 35
/YRANGE, -500, 1050
XVAR, 5
PLVAR, 4
/NOERASE
XVAR, 6
PLVAR, 4
/ERASE
FINISH