낙하실험에 의한 슬래밍 충격의 실험 연구
Experimental Investigations on Slamming Impacts by Drop Tests
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참고문헌
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초록
When ships are sailing with large motions in rough waves, the slamming phenomenon occurs and the ships suffer from impulsive pressure loadings. Recently, ships are becoming lager and faster than before and it becomes more possible that the ships experience larger impacts on their bows and sterns. Many researchers have been performing the investigations on slamming experimentally and theoretically for a long time. Most of the research reported in the open literature focused on how to accurately estimate the amplitude of the peak pressure of slamming. According to the results of a recently published work, not only the amplitude of peak pressure but also the width of the peak may play an important role in predicting the extents of damage of impacted structures. The uncertainty of impulsive pressure loadings due to slamming has been indicated by many researchers. However, probabilistic treatments of the impulsive pressure loadings are few. In this study, drop tests were conducted on wedges having dead-rise angles of 0° and 10°. Not only the amplitude of peak pressure but also the width of peak pressure were measured. Furthermore, the variations of those values are also provided for the probabilistic approach of the slamming problem.
Abstract
When ships are sailing with large motions in rough waves, the slamming phenomenon occurs and the ships suffer from impulsive pressure loadings. Recently, ships are becoming lager and faster than before and it becomes more possible that the ships experience larger impacts on their bows and sterns. Many researchers have been performing the investigations on slamming experimentally and theoretically for a long time. Most of the research reported in the open literature focused on how to accurately estimate the amplitude of the peak pressure of slamming. According to the results of a recently published work, not only the amplitude of peak pressure but also the width of the peak may play an important role in predicting the extents of damage of impacted structures. The uncertainty of impulsive pressure loadings due to slamming has been indicated by many researchers. However, probabilistic treatments of the impulsive pressure loadings are few. In this study, drop tests were conducted on wedges having dead-rise angles of 0° and 10°. Not only the amplitude of peak pressure but also the width of peak pressure were measured. Furthermore, the variations of those values are also provided for the probabilistic approach of the slamming problem.
참고문헌 (7)
- Park, S.W, "Whipping analysis of hull girders considering slamming impact loads", Journal of the Society of Naval Architects of Korea, 37(3), pp.99~109 (2000)
- 김용직, "선수 플레어 충격압력 추정과 구조설계에의 응용 - 콘테이너선과 자동차 운반선 -", 대한조선학회 논문집, 40(3), pp.29~36 (2003), 대한조선학회
- Cho, S.R, "Response characteristics of stiffened plates subjected to impulsive pressure loadings", J. Society of Naval Architects of Korea (2009)
- Cho, S.R, "Impulsive Pressure Loading and Response Assessment", Proc. 17th International Ship and Offshore Structures Congress, 통권 : 2, pp.367~432 (2009)
- Lee, S.G, "A study on Prediction of Impact Loads of Bow Structure", Proc. 8th Int. Offshore and Polar Engineering Conf.,, pp.353~360 (1998)
- Yang, S. H, "Experimental and Numerical Study on the Water Entry of Symmetric Wedges and a Stern Section of Modern Containership", 10th International Symposium on Practical Design of Ships and Other Floating Structures Houston. (2007)
- Chuang S. L, "Experimental on Slamming of Wedge-shaped Bodies", Journal of ship research, 11(3) (1967)