The Least-Square Collocation Method Used in Shell-Bending Problems
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摘要: 本文用最小二乘配點法分析彈性殼體彎曲問題。采用了加權殘數法中的混合法-事先既不滿足殼體彎曲定解微分方程式亦不滿足邊界條件,所選試函數為文獻[1]中提到的雙重冪級數。對于4邊簡支圓柱殼,其數值計算解與經典解析解誤差不超過1.5%;對于懸臂圓柱殼,取其特例一懸臂效分析時,其結果與解析解誤差亦不大。用本法可以編制出殼體彎曲問題的通用計算程序。Abstract: This paper analyses elastic shell-bending problems by means of the least-square collocation method.The mixed method of MWR has been used in which the trial function-a double power series with unknown coefficients can meet the requirements of neither the differential equation of deflection in the interior of shell nor the boundary conditions. The computational results of cylindrical shells with 4 hinged edges show the errors less than 1.5 percent as compared with results of classical solutions,When analysing cantilever plate problems-a special case of cantilever cylindrical shell, the errors are also small. The calculation of all shell-bending problems can be generaly programmed by means of the method presented in this paper.
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Key words:
- least-square collocation method /
- cylindrical shell /
- bending /
- trial function
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