基于三维应力方法的中厚壳耐压结构强度研究  

Structural strength of medium-thick shell based on three dimensional stress analysis method

作　　者：陈沙古[1,2] 吴智睿 高原 谢晓忠 冯令良 CHEN Sha-gu;WU Zhi-rui;GAO Yuan;XIE Xiao-zhong;FENG Ling-liang(China Ship Scientific Research Center,Wuxi 214082,China;Taihu Laboratory of Deepsea Technological Science,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室,江苏无锡214082

出　　处：《船舶力学》2024年第11期1731-1741,共11页Journal of Ship Mechanics

基　　金：国防科工局稳定支持项目(K3847);国家重点研发计划资助项目(2022YFC2808204)。

摘　　要：深海耐压结构的应用设计逐渐呈现采用中厚壳结构的特征,其结构应力特性与传统薄壳结构相比具有明显差异。本文以采用矩形肋骨加强的深海无人系统头盖结构为对象,基于环肋圆柱壳三维应力分析方法对中厚壳耐压结构强度开展研究。首先,通过文献中的算例检验三维应力方法计算程序关于环肋圆柱壳结构计算的正确性,然后对头盖主体结构进行典型应力计算,研究中厚壳结构受力特性,最后通过等效肋骨间距假设,计算获取头盖复杂结构典型区域壳板和肋骨的应力水平和分布规律。与有限元仿真计算和模型试验结果比较表明,三维应力分析方法用于中厚壳耐压结构应力计算时具有较好的适用性和工程精度,可以为深海耐压结构强度分析和中厚壳结构理论研究提供参考。The deep-sea pressure structure gradually presents the characteristics of a medium-thick shell,and their structural stress characteristics are significantly different from those of a traditional thin shell.Tak⁃ing a deep-sea unmanned system head cover reinforced with rectangular ribs as the object,the strength of medium-thick shells was studied based on the three dimensional stress analysis method of ring-stiffened cy⁃lindrical shells.Firstly,the correctness of the calculation of the three dimensional stress method on the cylin⁃drical shell was tested by examples in other literatures,then the typical stress calculation of the main struc⁃ture of head cover and the stress characteristics of the medium-thick shell were studied,and finally the stress level and distribution of the shell and rib in the typical area of the head cover were calculated based on the as⁃sumption of the equivalent rib spacing.Compared with the finite element simulation calculation and model test results,the three dimensional stress analysis method has good applicability and engineering accuracy for the stress calculation of medium-thick shell pressure structures,which can provide a reference for the strength analysis of deep-sea pressure structures and the theoretical research of medium-thick shells.

关 键 词：耐压结构 中厚壳 矩形肋骨 三维应力 结构强度 

分 类 号：U661[交通运输工程—船舶及航道工程]