Abstract A simplified mechanical analysis is carried out for a specific closure system of a pressure vessel, consisting of a segmented locking ring, partially inserted into an annular groove; the ring portion radially protruding from the slot supports the vessel bottom; sealing is achieved by placing a copper gasket between the ring and the bottom. Several formulae useful for design purposes are derived. In particular, an approximate contact reaction is assumed, that is formed by a distributed constant linear force and by concentrated forces at the extremities of the ring-slot contact; this assumption allows analytical expressions of the ring internal forces to be obtained. Stress concentrations at the re-entrant corners of the vessel groove are evaluated both numerically and analytically. An approximate formula is developed for forecasting the contact zones between the ring and the groove. A numerical example assessing the design formulae is presented.

中文翻译：

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通过分段锁环实现压力容器壳底封闭的设计

摘要 对压力容器的特定封闭系统进行了简化力学分析，该封闭系统由部分插入环形槽的分段锁紧环组成；从槽口径向突出的环部支撑容器底部；密封是通过在环和底部之间放置一个铜垫圈来实现的。导出了几个对设计有用的公式。特别地，假定近似接触反应，即由分布的恒定线性力和环槽接触末端的集中力形成；该假设允许获得环内力的解析表达式。在容器凹槽的凹角处的应力集中通过数值和分析进行评估。开发了一个近似公式来预测环和凹槽之间的接触区域。给出了评估设计公式的数值示例。