Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21
International Association of Classification Societies (IACS) is responsible for many of the ship strengthrules including both generally applicable Unified Strength Requirements (UR-S) and other rules specific for various ship types. For historical reasons, there have been different structural streng...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/8/1558 |
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| author | Yining Lv Lars Brubak Kinya Ishibashi Andrea Bollero Pål Arvid Saltvedt Åge Bøe |
| author_facet | Yining Lv Lars Brubak Kinya Ishibashi Andrea Bollero Pål Arvid Saltvedt Åge Bøe |
| author_sort | Yining Lv |
| collection | DOAJ |
| description | International Association of Classification Societies (IACS) is responsible for many of the ship strengthrules including both generally applicable Unified Strength Requirements (UR-S) and other rules specific for various ship types. For historical reasons, there have been different structural strength requirements regarding hatch covers, hatch coamings, and related structures in IACS UR S21, S21A, and CSR (Common Structural Rules for bulk carriers and oil tankers). This paper presents the work carried out to improve the related rules and thereby the development of the unified strength requirements for hatch covers. Firstly, related IACS rules are reviewed and compared, and some major improvements to the buckling formulations are proposed for improved accuracy. Secondly, with UR S35 being developed as a unified buckling toolbox, the unified strength requirements for hatch covers—UR S21 (Rev.6, complete revision)—are developed with a standardized interface of reference to UR S35 for buckling assessment. Finally, the numerical calculations of typical stiffened panels and full hatch covers are carried out for rule verification and consequence assessment, which demonstrates that more rational hatch cover designs can be achieved based on UR S21 (rev 6). |
| first_indexed | 2024-03-10T23:49:31Z |
| format | Article |
| id | doaj.art-75bb5c6876384eebbd8e60fcc8d54844 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T23:49:31Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-75bb5c6876384eebbd8e60fcc8d548442023-11-19T01:45:47ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-08-01118155810.3390/jmse11081558Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21Yining Lv0Lars Brubak1Kinya Ishibashi2Andrea Bollero3Pål Arvid Saltvedt4Åge Bøe5IACS—China Classification Society, Beijing 100007, ChinaIACS—DNV, 1363 Oslo, NorwayIACS—Nippon Kaiji Kyokai, Tokyo 102-8567, JapanIACS—Registro Italiano Navale, 16128 Genova, ItalyIACS—DNV, 1363 Oslo, NorwayIACS—DNV, 1363 Oslo, NorwayInternational Association of Classification Societies (IACS) is responsible for many of the ship strengthrules including both generally applicable Unified Strength Requirements (UR-S) and other rules specific for various ship types. For historical reasons, there have been different structural strength requirements regarding hatch covers, hatch coamings, and related structures in IACS UR S21, S21A, and CSR (Common Structural Rules for bulk carriers and oil tankers). This paper presents the work carried out to improve the related rules and thereby the development of the unified strength requirements for hatch covers. Firstly, related IACS rules are reviewed and compared, and some major improvements to the buckling formulations are proposed for improved accuracy. Secondly, with UR S35 being developed as a unified buckling toolbox, the unified strength requirements for hatch covers—UR S21 (Rev.6, complete revision)—are developed with a standardized interface of reference to UR S35 for buckling assessment. Finally, the numerical calculations of typical stiffened panels and full hatch covers are carried out for rule verification and consequence assessment, which demonstrates that more rational hatch cover designs can be achieved based on UR S21 (rev 6).https://www.mdpi.com/2077-1312/11/8/1558hatch cover strengthrule developmentbuckling strengthIACS UR S21UR S35 |
| spellingShingle | Yining Lv Lars Brubak Kinya Ishibashi Andrea Bollero Pål Arvid Saltvedt Åge Bøe Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 Journal of Marine Science and Engineering hatch cover strength rule development buckling strength IACS UR S21 UR S35 |
| title | Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 |
| title_full | Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 |
| title_fullStr | Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 |
| title_full_unstemmed | Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 |
| title_short | Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21 |
| title_sort | development of the iacs unified strength requirements for hatch covers ur s21 |
| topic | hatch cover strength rule development buckling strength IACS UR S21 UR S35 |
| url | https://www.mdpi.com/2077-1312/11/8/1558 |
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