基于分层分压结构的新型潜水器耐压壳结构设计
NEW STRUCTURAL DESIGN OF SPHERICAL PRESSURE HULL FOR DEEP-SEA SUBMERSIBLES: A MULTILAYER AND PRESSURE REDISTRIBUTION APPROACH
查看参考文献43篇
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文摘
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耐压壳是深海潜水器中最关键的结构,直接关系到潜水器安全性和总体性能. 本文对当今的单层耐压壳结构设计进行了评述,并设计了一种基于分层/分压的新型耐压壳结构,该结构借鉴了自然界的两种深潜动物的结构:抹香鲸分层结构和鹦鹉螺隔片分割螺壳亚结构. 综合了这两种结构特性的双层壳结构能够有效提高抗压能力,从而提升深潜能力. 与以往单层球壳的耐压壳结构相比,该结构不仅提高了强度,也提高了抗屈曲能力.同时,该结构还兼具大容积、高可靠性、以及避免超厚壳制备上的难点等特征,使得深海潜水器的综合性能得到显著提高. 新结构中的桁架将圆壳分割为若干个柱壳亚结构,本文针对此亚结构严格推导了桁架增强壳体抗屈曲的公式. 从实验数据中总结出来的泰勒水池公式是目前广泛使用的潜水器壳体设计依据,新推导的公式与之相比只有6% 的差别,这使得新型结构设计有了更坚实的理论基础. |
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其他语种文摘
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The pressure hull is the most important key structure to a deep-sea submersible, whose safety and overall performance depend on the integrity of the pressure hull. The current single shell design of the pressure hull is reviewed and a new design based on the multilayer and pressure redistribution mechanism is also proposed in this study. The design is inspired by two deep-sea animals of sperm whale and nautilus. The two mechanisms, the multilayer structure of sperm whale and the shell substructure divided by the septa of nautilus, are synthesized in the design to improve the pressurebearing capacity of the hull. Compared with the one layer structure of the pressure hull, the new design increases both the structural strength and buckling load. Furthermore, the new design can also significantly improve the overall performance of the deep-sea submersible by enlarging the hull volume, enhancing its reliability and lessening the technical challenges of fabricating ultra-thick shell structure. Because the truss structure is introduced in the new shell design, which effectively divides a spherical shell into several substructures of cylindrical shell, a formula is strictly derived to evaluate the truss effect on the buckling load bearing capability of a cylindrical shell. The difference between the newly derived formula and the formula of the Taylor basin, which is summarized from the experimental data and widely used as a standard for the current design of submersible shell, is only 6%. Furthermore, this new derivation also lays a solid theoretical foundation for our new shell design. |
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来源
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力学学报
,2017,49(6):1231-1242 【核心库】
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DOI
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10.6052/0459-1879-17-156
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关键词
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耐压壳
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深潜器
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结构
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强度
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屈曲
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地址
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中国科学院力学研究所, 非线性力学国家重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0459-1879 |
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学科
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水路运输 |
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基金
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中国科学院B 类战略性先导科技专项
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国家自然科学基金
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文献收藏号
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CSCD:6123047
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