论潜水耐压圆柱壳的异常特性及其对策(英文)

On the Unusual Properties of Circular Cylindrical Pressure Shells and Countermeasures

分析了大直径新材料潜水环肋圆柱壳结构存在的若干异常特性,给出了存在异常特性时计算环肋圆柱壳强度和稳定性的方法,并提出消除异常特性的对策,即:1)当结构重量不受限制时可改用屈服极限较低的材料,通过加大壳板厚度的方法来消除异常特性;2)当结构重量受限制.必须选用屈服极限很高的材料时,可选用纵横加肋圆柱壳结构来消除异常特性.为此给出了纵横加肋圆柱壳结构的强度和稳定性的理论计算方法.本文最后通过优化设计的实例优化证明大直径新材料潜艇或潜水器适合采用纵横加肋圆柱壳结构形式.

The unusual properties, i. e. half-wave number of overall stability along length m≠=/1 and parameter γ≥/1 etc, of large diameter, new material and thin circular cylindrical shells are analysed. A method is presented to calculate the strength and stability of RSCCS, Ring-Stiffened Circular Cylindrical Shells,in the presence of unusual properties. To eliminate the unusual properties, we suggest: 1) If the weight of hulls is unlimited, we could increase the thickness of traditional RSCCS with materials of low yield limit; 2) If the weight of hulls is limited, we could utilize the LTSCCS, Longitudinal-Transverse Stiffened Circular Cylindrical Shells, for materials with high yield limit. We thus propose analytical formulae for the calculation of the strength and stability of LTSCCS. Finally, examples of structural optimization are presented which prove that LTSCCS are structurally efficient for large diameter,new materials submarines and submersibles.