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1962年，Lubinskl等人用限制在环柱内的无重量圆形立柱螺旋状弯曲后的形状推导出描述油管变形的常用公式。本文介绍了他们在推导弯曲状态下所施加的力和螺旋线螺距之间关系另一种表达式方面的工作进展。根据简明的试验室试验及稳定性论证，表明以前得出的力-螺距公式适用于加载过程，本文所给的公式适用于卸载过程。
In 1962, Lubinskl et al. Derived a common formula describing the deformation of tubing by using the helical shape of a weightless circular column confined within a ring column. This article describes the progress made in their work on deriving the relationship between the applied force in the bent state and the pitch of the helix. According to the concise laboratory test and stability demonstration, it shows that the force-pitch formula obtained in the past is suitable for the loading process. The formula given in this paper is suitable for the unloading process.