西南石油大学学报(自然科学版) ›› 1988, Vol. 10 ›› Issue (2): 29-38.DOI: 10.3863/j.issn.1000-2634.1988.02.04

• 论文 • 上一篇    下一篇

正确认识管柱“中和点”

吴疆
  

  1. 石油开发系
  • 收稿日期:1987-09-14 修回日期:1900-01-01 出版日期:1988-04-20 发布日期:1988-04-20

CORRECT UNDERSTANDING OF TWE PIPE-STRING NEUTRAL POINT

Wu Jiang
  

  1. (Department of Exploitation)
  • Received:1987-09-14 Revised:1900-01-01 Online:1988-04-20 Published:1988-04-20

摘要: 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。

关键词: 管柱, 应力, 中和点, 零轴向力点, 弯曲失稳分界点

Abstract:

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.

Key words: Pipe string, Stress, Neutral point, Axial zero-stress point, Unstable demarcation point