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3 H5 N5 F' K* T5 W$ \& a" v. f/ l提示：如果力控制法不能收敛，试用弧长法。6 s( K( A2 X W7 }- N+ X/ V
, ? Y0 @; ^( w, N' wTitle Snap-Through Buckling of a Hinged Shell
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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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8 {4 ]6 t8 |( d2 X7 s1 c/ [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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9 X8 P2 O, @9 R/ K7 ?7 R5 nFigure 17.1 Hinged Shell Problem Sketch0 V- a4 o; J' L1 x M0 q! [4 L. [
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| 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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* u8 f3 [6 T/ a5 U( f+ VAnalysis 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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8 { e* t: `& d3 E6 d7 ~9 Q) \8 p& YResults 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
- H( z4 I1 y7 p. g7 O) k6 BFigure 17.2 Deflection and Total Load Plot
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$ Q7 P7 o+ o2 k- N4 ?( D* @2 ][ 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