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.
算例表明，在消耗相同材料的情况下，半圆环加肋圆柱壳具有较好的抗水压性能；
Critical pressures of the cylindrical Shells stiffened by rings with semi-torus section and by circular tube are calculated and compared.
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