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将翻管中的各种失效归纳为七种失稳型式、分析了失稳机理和失稳模式相互转化的条件、翻管失稳的影响因素及防止措施；提出了便于翻管工程计算中几种临界失稳力的计算式；论述了翻管失稳过程中，失稳可能从临界失稳力较低模式转化为失稳力较高的失稳模式这一反常现象出现的原因。
The various failures in turnover tube are summarized as seven kinds of failure modes. The conditions for mutual transformation of instability mechanism and instability mode, the influencing factors and prevention measures of turnover failure are analyzed. This paper discusses the reason why the instability may change from the low critical failure force mode to the unstable mode with high destabilizing force.