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提示：如果力控制法不能收敛，试用弧长法。" q1 J- s, F% ?; {; r6 P
) O9 y9 U; V' t1 c9 \7 eTitle Snap-Through Buckling of a Hinged Shell: s, |: t8 C8 d, G7 t
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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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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 Sketch0 R! e6 |/ a9 [3 _! D; T2 \* r2 p
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6 p* i$ ^6 h3 H- G4 Z) w7 W| 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 POST26.1 H) v0 K% M. V" q+ S9 n9 E
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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 |
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- Target results are from graphical solution
$ E1 \+ _" S% \$ MFigure 17.2 Deflection and Total Load Plot
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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