비대칭 손상 선박의 잔류 종강도 평가
Residual Longitudinal Strengths of Asymmetrically Damaged Ships
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초록
This paper presents estimation of deterministic damage extents and locations due to collision and grounding which are defined by ABS guideline and DNV ship rules. It is noted that the overall extents of damages from DNV are larger than those from ABS. Nonlinear FEAs are carried out to predict residual longitudinal strength of hull girder with asymmetric severe damages. The accuracy of the applied FEA procedure is proved by comparing FEA result with test result of a 1/3-scaled frigate. The investigated vessels are a VLCC and a large-sized bulker for which evenly distributed heeling angles from 0°(sagging) to 180°(hogging) by 30°due to damage-induced flooding are taken into account. The reduction ratios of the ultimate residual strength for the damaged cases to those for the intact sagging case are shown. It is proved that the grounding damage case under DNV assumption reveals most critical the residual strength. The design formulas are presented to assure minimum residual ultimate moment after damage.
Abstract
This paper presents estimation of deterministic damage extents and locations due to collision and grounding which are defined by ABS guideline and DNV ship rules. It is noted that the overall extents of damages from DNV are larger than those from ABS. Nonlinear FEAs are carried out to predict residual longitudinal strength of hull girder with asymmetric severe damages. The accuracy of the applied FEA procedure is proved by comparing FEA result with test result of a 1/3-scaled frigate. The investigated vessels are a VLCC and a large-sized bulker for which evenly distributed heeling angles from 0°(sagging) to 180°(hogging) by 30°due to damage-induced flooding are taken into account. The reduction ratios of the ultimate residual strength for the damaged cases to those for the intact sagging case are shown. It is proved that the grounding damage case under DNV assumption reveals most critical the residual strength. The design formulas are presented to assure minimum residual ultimate moment after damage.
참고문헌 (20)
- Amlashi, H. K. K, "Ultimate strength analysis of a bulk carrier hull girder under alternate hold loading condition. A case study: Part 1: Nonlinear finite element modelling and ultimate hull girder capacity", Marine Structures, 21(4), pp.327~352 (2008)
- "Guide for Assessing Hull-Girder Residual Strength for Tankers"[URL]
- "Guide for Assessing Hull-Girder Residual Strength for Bulk Carriers"[URL]
- Caldwell, J.B, "Ultimate Longitudinal Strength", Transactions of Royal Institution of Naval Architects, 107, pp.411~430 (1965)
- 정준모, "선박의 비대칭 단면 특성에 대한 연구", 대한조선학회 논문집, 47(6), pp.843~849 (2010), 대한조선학회
- Det Norske Veritas, "Rules for Classification of Ships Part 3 Chapter 1" (2009), DNV
- Dow, R.S, "Testing and Analysis of a 1", 3-Scale Welded Steel Frigate Model, 1991, 749~773
- Fang, C, "Hull girder ultimate strength of damaged ships", Proceeding of International Symposium on Practical Design in Shipbuilding and Other Floating Structures (PRADS), pp.309~316 (2004)
- "Common Structural Rules for Double Hull Oil Tankers"[URL]
- "Common Structural Rules for Bulk Carriers"[URL]
- 78 & 1984 Amend Annex I Chapter III Requirement for Minimizing Oil Pollution from Oil Tankers due to Side and Bottom Damages, "MARPOL 73", pp.1997, International Maritime Organization
- Maestro, M, "An Assessment of the Structural Capability of Damaged Ships: The Plastic Approach in Longitudinal Unsymmetrical Bending and the Influence of Buckling", International Shipbuilding Progress, 36(408), pp.255~265 (1988)
- Paik, J. K, "A simple formulation for predicting the ultimate strength of ships", Journal of Marine Science and Technology, 1(1), pp.52~62 (1995)
- Paik, J.K, "Residual Strength Assessment of Ships after Collision and Grounding", Marine Technology, 35(1), pp.38~54 (1998)
- Paik, J.K, "Methods for ultimate limit state assessment of ships and ship-shaped offshore structures: part II stiffened panels", Ocean Engineering, 35, pp.271~280 (2008)
- Smith, C.S., "Influence of Local Compression Failure on Ultimate Longitudinal Strength of a Ship Hull", Proceeding of International Symposium on Practical Design in Shipbuilding (PRADS), pp.73~79 (1977)
- Smith, C.S, "Strength and Stiffness of Ships' Plating under In-plane Compression and Tension", Transactions of Royal Institution of Naval Architects, 130, pp.277~296 (1988)
- Ueda, Y, "Advances in the application of ISUM to marine structures", Proceedings of the Second International Conference on Advances in Marine Structures, pp.628~649 (1991)
- Wang, G, "Longitudinal Strength of Ships with Accidental Damages", Marine Structures, 15, pp.119~138 (2002)
- Zhang, S-K, "A semi-analytical method of assessing the residual longitudinal strength of damaged ship hull", Proceedings 6th Intl Offshore and Polar Eng'g Conference, pp.510~516 (1996)