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提示：如果力控制法不能收敛，试用弧长法。, {7 M, Z2 w' j9 O4 P5 K$ `& i
" t) B$ ~' e, Q6 zTitle Snap-Through Buckling of a Hinged Shell! }' Z( p3 U: a* ~0 @+ K# I
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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# v Z1 Z1 H- Y4 v! W3 ]) Q
9 e1 \& V0 d6 V* H: BA 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.2 J% P% F1 ]/ t/ D7 R. |
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Figure 17.1 Hinged Shell Problem Sketch' I% E" I6 e+ {8 m! Y
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2 E, E- D) j+ e, D* M f* P5 ?| 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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2 N2 c! b& q( ^' B- T4 sAnalysis 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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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
6 S" D7 l3 h0 K( I6 f p' NFigure 17.2 Deflection and Total Load Plot% T2 _1 q" J4 J' s
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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