Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis

IF 3.2 3区工程技术 Q2 MECHANICS

Theoretical and Applied Mechanics Letters Pub Date : 2023-07-01 DOI:10.1016/j.taml.2023.100452

Yogie Muhammad Lutfi , Ristiyanto Adiputra , Aditya Rio Prabowo , Tomoaki Utsunomiya , Erwandi Erwandi , Nurul Muhayat

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引用次数: 6

Abstract

Ocean thermal energy conversion (OTEC) is a process of generating electricity by exploiting the temperature difference between warm surface seawater and cold deep seawater. Due to the high static and dynamic pressures that are caused by seawater circulation, the stiffened panel that constitutes a seawater tank may undergo a reduction in ultimate strength. The current paper investigates the design of stiffening systems for OTEC seawater tanks by examining the effects of stiffening parameters such as stiffener sizes and span-over-bay ratio for the applied combined loadings of lateral and transverse pressure by fluid motion and axial compression due to global bending moment. The ultimate strength calculation was conducted by using the non-linear finite element method via the commercial software known as ABAQUS. The stress and deformation distribution due to pressure loads was computed in the first step and then brought to the second step, in which the axial compression was applied. The effects of pressure on the ultimate strength of the stiffener were investigated for representative stiffened panels, and the significance of the stiffener parameters was assessed by using the sensitivity analysis method. As a result, the ultimate strength was reduced by approximately 1.5% for the span-over-bay ratio of 3 and by 7% for the span-over-bay ratio of 6.

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OTEC海水箱加劲板性能评估:参数化研究与敏感性分析

海洋热能转换(OTEC)是利用温暖的表层海水和寒冷的深层海水之间的温差来发电的过程。由于海水循环引起的高静、动压力，构成海水箱的加筋板的极限强度可能会降低。本文研究了OTEC海水储罐加劲系统的设计，通过检查加劲参数(如加劲尺寸和跨舱比)对流体运动引起的侧向和横向压力以及由于整体弯矩引起的轴向压缩的组合载荷的影响。极限强度计算采用非线性有限元法，通过ABAQUS商用软件进行。在第一步计算压力载荷下的应力和变形分布，然后将其带入施加轴向压缩的第二步。以典型加筋板为研究对象，研究了压力对加筋极限强度的影响，并采用灵敏度分析方法对加筋参数的意义进行了评价。结果表明，当跨湾比为3时，极限强度降低了约1.5%，当跨湾比为6时，极限强度降低了7%。

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

Theoretical and Applied Mechanics Letters MECHANICS-

CiteScore

6.20

自引率

2.90%

发文量

545

审稿时长

12 weeks

期刊介绍： An international journal devoted to rapid communications on novel and original research in the field of mechanics. TAML aims at publishing novel, cutting edge researches in theoretical, computational, and experimental mechanics. The journal provides fast publication of letter-sized articles and invited reviews within 3 months. We emphasize highlighting advances in science, engineering, and technology with originality and rapidity. Contributions include, but are not limited to, a variety of topics such as: • Aerospace and Aeronautical Engineering • Coastal and Ocean Engineering • Environment and Energy Engineering • Material and Structure Engineering • Biomedical Engineering • Mechanical and Transportation Engineering • Civil and Hydraulic Engineering Theoretical and Applied Mechanics Letters (TAML) was launched in 2011 and sponsored by Institute of Mechanics, Chinese Academy of Sciences (IMCAS) and The Chinese Society of Theoretical and Applied Mechanics (CSTAM). It is the official publication the Beijing International Center for Theoretical and Applied Mechanics (BICTAM).