THE POLYNOMIAL STRESS FUNCTION SOLUTION FOR THE RECTANGULAR STRIP BENDING

In this paper, we propose some formulas for seeking a part of the particular solutions of the heavy harmonics and Tricomi equations and obtain the precise polynomial solutions of the finite-item number for rectangular strip bending problem when the intensity of the distributed load varies with the fourth power of longitudinal coordinate.

Efficient Algorithms for Approximating Particular Solutions of Elliptic Equations Using Chebyshev Polynomials

In this paper,we propose efficient algorithms for approximating particular solutions of second and fourth order elliptic equations.The approximation of the particular solution by a truncated series of Chebyshev polynomials and the satisfaction of the differential equation lead to upper triangular block systems,each block being an upper triangular system.These systems can be solved efficiently by standard techniques.Several numerical examples are presented for each case.

狭长矩形梁弯曲问题的多项式应力函数解法

本文给出了求双调和方程和脱里谷米方程的部分特解的一些公式;并得到了分布载荷的集度按纵向坐标的四次幂规律变化时,狭长矩形梁弯曲问题的有限项数形式的多项式精确解.

矩形截面梁受五次多项式作用的应力函数解答

针对矩形截面悬臂梁受任意五次多项式分布载荷作用的情况,采用逆解法,构造一个既满足双调和方程,又满足边界条件的应力函数,并且运用此应力函数求解出了该情况下的各应力分量.此外,将该理论应用于一个工程实例中,理论计算与实验结果比较吻合.克服了矩形截面悬臂梁受五次多项式分布载荷作用时选取应力函数的盲目性,为选取矩形截面悬臂梁在更复杂载荷下的应力函数奠定了基础.

MATHEMATICA在弹性力学解析法中的应用

根据二维双调和方程的特点并借助于MATHEMATICA软件,得到了应力函数双调和方程的多项式解答。作为算例,对平面问题中简支梁受三次分布载荷作用时的应力进行了计算。