本文提出了半圆环壳型肋骨加强的耐压圆柱壳结构形式，在理论和模型试验研究的基础上建立了设计计算方法。

In present paper, a new type of ring-stiffener, called the ring-stiffener of half-tube, is introduced in pressurized cylindrical shell structures.

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潜艇耐压壳体上大的开孔常常切断一根肋骨，并且用围壁进行加强。

A big hole generally cuts off a ring on the pressure hull of submarine, and is stiffened by coaming.

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