本文通过理论分析和对各种强度理论的安全系数与直径比关系的讨论,研究了各强度理论在自紧身管设计中的适用性,并阐明了100%过应变自紧管和非100%过应变自紧管之间的关系把100%过应变自紧管的安全系数推广到非100%过应变自紧管。从而在我国当前尚缺乏足够经验数据的情况下,为利用国外资料确定自紧身管设计的安全系数提供参考性意见。 This paper discusses the applicability of each strength theory in self-tight tube design through theoretical analysis and discussion of the relationship between safety factor and diameter ratio of various strength theories, and clarifies 100% over-strain self-tightening tube and non-100% The relationship between strained self-closing tubes extends the safety factor of 100% over-strain self-tightening tubes to non-100% over-strain self-tightening tubes. Thus, in the absence of sufficient empirical data in China, it provides reference opinions for using foreign data to determine the safety factor of the self-tightening tube design.