|
|
马上注册，结识高手，享用更多资源，轻松玩转三维网社区。
您需要 登录 才可以下载或查看，没有帐号？注册
x
.: H* Q: |% N% U. R" h
提示：如果力控制法不能收敛，试用弧长法。
( J0 M m6 r, q
4 ^3 d) |, l1 TTitle Snap-Through Buckling of a Hinged Shell
' K0 b; l, M+ C Y% ~# ?' Y
( W7 P9 I5 I: l0 m, xOverview
5 w% @5 X9 s* @+ v. G" Q+ z: I% s
| Reference: | C. C. Chang, “Periodically Restarted Quasi-Newton Updates in Constant Arc-Length Method”, Computers and Structures, Vol. 41 No. 5, 1991, pp. 963-972. | | Analysis Type(s): | Static Analysis |
- Q& ~! v0 t% H0 F
Test Case* }/ h: V0 x- i2 j4 I; E& V
- j: k: Y6 w4 F: Y) H% MA hinged cylindrical shell is subjected to a vertical point load (P) at its center. Find the vertical displacement (UY) at points A and B for the load of 1000 N.
$ B! V N, m2 P% D: h2 u
' ?: W9 V) q7 H3 tFigure 17.1 Hinged Shell Problem Sketch
) R2 A+ n! P0 q4 O- h* f, h( U6 @# V4 r$ i! _; j) i
5 F) ?! e7 t7 j8 \8 r8 n
! ~9 p9 _( R' P2 I: Y; ~
| Material Properties | | E = 3.10275 kN/mm2 | | υ = 0.3 |
| | Geometric Properties | | R = 2540 m | | l= 254 m | | h = 6.35 m | | Θ = 0.1 rad |
| |
3 `2 C9 I) ~2 D2 y
Analysis Assumptions and Modeling NotesDue to symmetry, only a quarter of the structure is analyzed. The structure exhibits the nonlinear postbuckling behavior under the applied load. Therefore, a large deflection analysis is performed using the arc length solution technique. The results are observed in POST26.. \' x: `7 C8 t2 h6 \' F9 ?! X
e& T. k+ S# Q: a/ HResults Comparison | Target [1] | ANSYS | Ratio | | UY @ A, mm | -30.0 | -31.7 | 1.056 | | UY @ B, mm | -26.0 | -25.8 | 0.994 |
8 `6 @; {/ [) }& S( H2 [2 I6 k I
- Target results are from graphical solution
, p0 l3 H# t1 l$ \Figure 17.2 Deflection and Total Load Plot1 m7 L D; @0 B; e' _5 ~! ]+ {
8 F9 ? [, I4 C7 R
: n5 a7 L! u' _0 j
+ W& s; J3 v3 I8 a& v D[ 本帖最后由 tigerdak 于 2007-11-8 01:08 编辑 ] |
|
[复制链接]
发表于 2007-11-8 01:07:04