Analysis of edge stress of combined shell under internal waves

IF 1.4 4区物理与天体物理 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

AIP Advances Pub Date : 2024-09-09 DOI:10.1063/5.0225674

Yiqiong Cui

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引用次数: 0

Abstract

Internal wave is essentially a gravity wave induced by the layered structure of water (e.g., density stable layering), with its maximum amplitude occurring within the ocean. Similar to surface waves, internal waves have significant influence on the strength and stability of a submerged body as an external factor. Meanwhile, combined shells are exposed to complicated loads under internal waves, and edge stress is dominant. In this study, the edge stresses of combined shell (typical hemisphere–cylinder combined shell and unfolded sphere–cylinder combined shell) under internal waves were analyzed. Indeed, a semi-empirical, semi-theoretical formula for the edge stress of combined shells (typical hemisphere–cylinder combined shell and unfolded sphere–cylinder combined shell) has been proposed. In this study, the semi-empirical, semi-theoretical formula was corrected by introducing internal wave loads, with the depth of the internal wave taken into consideration. In addition, the corrected formula was verified by finite element analysis, and a simplified equation for the calculation of edge stress of the combined shell under internal waves was developed, with errors in a rational range.

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内波作用下组合壳体边缘应力分析

内波本质上是由水的分层结构（如密度稳定的分层）诱发的重力波，其最大振幅出现在海洋内部。与表面波类似，内波作为一种外部因素，对水下物体的强度和稳定性有重大影响。同时，组合壳在内波作用下承受复杂的载荷，边缘应力占主导地位。本研究分析了组合壳（典型的半球-圆柱组合壳和展开的球-圆柱组合壳）在内波作用下的边缘应力。实际上，已经提出了组合壳（典型半球-圆柱组合壳和展开球-圆柱组合壳）边缘应力的半经验半理论公式。在本研究中，通过引入内波载荷并考虑内波深度，对半经验半理论公式进行了修正。此外，还通过有限元分析验证了修正后的公式，并建立了内波作用下组合壳边缘应力的简化计算公式，其误差在合理范围内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIP Advances NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

2.80

自引率

6.20%

发文量

1233

审稿时长

2-4 weeks

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