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6 s. P" P6 H9 w$ n" m/ F提示：如果力控制法不能收敛，试用弧长法。
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& V2 X E/ q" zTitle Snap-Through Buckling of a Hinged Shell
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Overview; F* }: f$ V' [
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| 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 |
4 f# e+ {) _' H" e* }9 d! b! F- LTest Case5 ~3 e& `! K" Y8 P' J8 \
* u: K4 p1 i5 q8 c+ A& O& W* i1 gA 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.) D' r1 ^$ n6 H) W4 _1 v0 T; w$ _; N
) {2 ~9 T5 m' C1 E7 z, IFigure 17.1 Hinged Shell Problem Sketch
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/ Y: `6 h$ i2 [1 |1 U0 S| 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 |
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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.! I. V4 y+ k5 b' K# O
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Results Comparison | Target [1] | ANSYS | Ratio | | UY @ A, mm | -30.0 | -31.7 | 1.056 | | UY @ B, mm | -26.0 | -25.8 | 0.994 |
* _6 Y% B6 {# W. s7 L2 q- Target results are from graphical solution
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Figure 17.2 Deflection and Total Load Plot
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1 W) ?; e* z3 L[ 本帖最后由 tigerdak 于 2007-11-8 01:08 编辑 ] |
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发表于 2007-11-8 01:07:04