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3 K, @* e% u" g1 I提示：如果力控制法不能收敛，试用弧长法。6 I5 w$ t! ~, H
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Title Snap-Through Buckling of a Hinged Shell
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Overview
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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 |
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Test Case
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A 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.
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Figure 17.1 Hinged Shell Problem Sketch
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" [& U. H* _% w. l0 Q4 T0 h; x( N1 M' `| 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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/ p8 ]; U# X3 OAnalysis 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.
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|2 t6 `& B1 v. _0 i7 vResults Comparison | Target [1] | ANSYS | Ratio | | UY @ A, mm | -30.0 | -31.7 | 1.056 | | UY @ B, mm | -26.0 | -25.8 | 0.994 |
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- Target results are from graphical solution
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Figure 17.2 Deflection and Total Load Plot/ w* R1 b* T' g# G/ `# d# ]) O
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[ 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