Abstract: In this paper the shear deformation of space truss is not considered.According to weighted residual method,a deflection function of space truss is formed in the space of double fifth B-spline function,and is used to calculate deflection and internal force of this space truss by the least-square collocation method.The computed result is very good and the method is easy to use for engineering.

Key words: space truss, B-spline function, residual equation, the least-square collocation method, deflection

摘要： 针对不计剪切变形的平板网架,本文根据加权残值法的基本原理,在双五次B样条函数空间中构造网架的挠度试函数,用最小二乘配点法,分析网架的挠度和内力,所得结果均很好,可用于工程实际。

关键词: 网架, B样条函数, 残值方程, 最小二乘配点法, 挠度