Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis
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 se...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Theoretical and Applied Mechanics Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095034923000235 |
| _version_ | 1797635323131330560 |
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| author | Yogie Muhammad Lutfi Ristiyanto Adiputra Aditya Rio Prabowo Tomoaki Utsunomiya Erwandi Erwandi Nurul Muhayat |
| author_facet | Yogie Muhammad Lutfi Ristiyanto Adiputra Aditya Rio Prabowo Tomoaki Utsunomiya Erwandi Erwandi Nurul Muhayat |
| author_sort | Yogie Muhammad Lutfi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T12:19:32Z |
| format | Article |
| id | doaj.art-35f433e5bc5f40ac8ac3ada5bba81601 |
| institution | Directory Open Access Journal |
| issn | 2095-0349 |
| language | English |
| last_indexed | 2024-03-11T12:19:32Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Theoretical and Applied Mechanics Letters |
| spelling | doaj.art-35f433e5bc5f40ac8ac3ada5bba816012023-11-07T04:02:26ZengElsevierTheoretical and Applied Mechanics Letters2095-03492023-07-01134100452Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysisYogie Muhammad Lutfi0Ristiyanto Adiputra1Aditya Rio Prabowo2Tomoaki Utsunomiya3Erwandi Erwandi4Nurul Muhayat5Department of Mechanical Engineering, Universitas Sebelas Maret, Surakarta 57126, IndonesiaResearch Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya 60117, Indonesia; Corresponding authors.Department of Mechanical Engineering, Universitas Sebelas Maret, Surakarta 57126, Indonesia; Corresponding authors.Department of Marine Systems Engineering, Kyushu University, Fukuoka 819-0395, JapanResearch Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya 60117, IndonesiaDepartment of Mechanical Engineering, Universitas Sebelas Maret, Surakarta 57126, IndonesiaOcean 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.http://www.sciencedirect.com/science/article/pii/S2095034923000235Ocean thermal energy conversion (OTEC)Seawater tankStiffened panelsNumerical analysisCombined loadings |
| spellingShingle | Yogie Muhammad Lutfi Ristiyanto Adiputra Aditya Rio Prabowo Tomoaki Utsunomiya Erwandi Erwandi Nurul Muhayat Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis Theoretical and Applied Mechanics Letters Ocean thermal energy conversion (OTEC) Seawater tank Stiffened panels Numerical analysis Combined loadings |
| title | Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis |
| title_full | Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis |
| title_fullStr | Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis |
| title_full_unstemmed | Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis |
| title_short | Assessment of the stiffened panel performance in the OTEC seawater tank design: Parametric study and sensitivity analysis |
| title_sort | assessment of the stiffened panel performance in the otec seawater tank design parametric study and sensitivity analysis |
| topic | Ocean thermal energy conversion (OTEC) Seawater tank Stiffened panels Numerical analysis Combined loadings |
| url | http://www.sciencedirect.com/science/article/pii/S2095034923000235 |
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