杆系结构非线性稳定分析的一种新方法

A NEW METHOD FOR NONLINEAR STABILITY ANALYSIS OF MEMBER STRUCTURES

摘要: 本文提出了相对刚度参数及其衍生参数的概念,它们可以揭示和反映杆系结构全过程跟踪分析中结构刚度的变化规律。根据这两个参数的特性,文中提出了确定自动荷载增量参数的新方法,较好地解决了稳定分析中全过程跟踪技术中的疑难问题。文中通过实例来说明相对刚度参数的确定和应用,表明本文分析方法是正确的和有效的。

Abstract: The concepts of relative stiffness parameter and its derived parameter are iutroduced to reflect the change of the structure stiffness in complete-process analysis. The automatic load incrementation procedures based on this parameter are presented, which are shown to be very successful for the test problems considered.