最小二乘配点法解壳体弯曲问题

The Least-Square Collocation Method Used in Shell-Bending Problems

  • 摘要: 本文用最小二乘配点法分析弹性壳体弯曲问题。采用了加权残数法中的混合法-事先既不满足壳体弯曲定解微分方程式亦不满足边界条件,所选试函数为文献1中提到的双重幂级数。对于4边简支圆柱壳,其数值计算解与经典解析解误差不超过1.5%;对于悬臂圆柱壳,取其特例一悬臂效分析时,其结果与解析解误差亦不大。用本法可以编制出壳体弯曲问题的通用计算程序。

     

    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.

     

/

返回文章
返回