CosmosWorks算法验证文件 8 (Nonlinear)

tigerdak

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提示：如果力控制法不能收敛，试用弧长法。
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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

Test Case
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! O5 G5 a$ \  f# mA 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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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

Loading P = 1000 N

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.
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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

• Target results are from graphical solution

Figure 17.2  Deflection and Total Load Plot
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6 _; N4 \4 ^; d[ 本帖最后由 tigerdak 于 2007-11-8 01:08 编辑 ]