样条有限元

本文用三次B样条变分方法解规则区域上板梁组合弹性结构的平衡问题.推导出了适用于各种边界条件的统一计算格式,便于在计算机上实现.与通常有限元相比,具有计算量少、精确度高等显著特点.文中对自然边界条件作为约束条件的影响给予了考虑,并以板的弯曲问题为例说明影响极微.给出了几个数值的例子.

ON SPLINE FINITE ELEMENT METHOD

In this paper a finite element method based on cubic B-spline is presented to obtainnig approximate solution for the equilibrium problems of elastic composite structures on regular regions.A computational scheme well suited for various types of boundary conditions is derived.It is easily carried out by a computer.In comparison with the usual nodal finite element method, the main features of the present method are higher accuracy and more economy in computing storage and time requirements.The effect of imposing natural boundary condition as constraints is considered and it is shown by a plate bending problem that this effect is quite superficial.Several numerical results are presented.