正确认识管柱“中和点”

本文全面、详细地分析了历来的各种“中和点”定义和提法，对“中和点”的物理力学特性作了详细分析，时“中和点”与“零轴向力点”、“中性截面”间关系、“中和点”是否管柱弯曲失稳分界点等问题给出了结论。本文对于正确认识“中和点”概念及其在工程中的作用是有所稗益的。

CORRECT UNDERSTANDING OF TWE PIPE-STRING NEUTRAL POINT

In this article, all definitions of pipe-string neutral point mentioned in previous occasions and their mechanical properties are analyzed in detail. The relationship between the neutral point, the axial zero-stress point and the neutral section is discussed. Answers are presented to such problems as whether the neutral point is the unstable demarcation point of the pipe-string while bent. This is beneficial to the correct understanding of the neutral point and its effect on engineering.