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Abstract Recently, free-fall lifeboats are becoming popular due to the fact that many life threatening accidents have occurred with conventional lifeboat systems. Most of the accidents happened during launching and after lowering the boat into the rough seas in high wind. During launch, the lifeboat may hit the sides of the distressed vessel, become severely damaged and occupants may fall into the sea causing injury and even death. It is impossible to launch the lifeboat if the parent vessel is listing significantly or if the falling becomes tangled. After lowering the boat into the water, it may be unable to move away from the distressed vessel if high seas and winds continually push the lifeboat towards the parent vessels or due to the inability of the engine to start. These situations become even more dangerous during fire or when the potential for an explosion exists. Many of the risks associated with conventional lifeboat systems have been substantially reduced by the free-fall lifeboat system. These problems are minimized with the free-fall lifeboat because it is not lowered into the sea. The free-fall lifeboat falls freely into the sea, generating kinetic energy as it does so. The kinetic energy, which is developed, propels the lifeboat away from the distressed vessel during and immediately after water entry. The lifeboat moves away from the danger even if the engine does not operate. This paper presents a method for design modification of a damaged free-fall lifeboat (FFLB) through the result of skid-launching free-fall test in the four falling phase, that is, sliding phase, rotation phase, free-fall phase, and water entry phase. In case of water entry phase, the damage of the free-fall lifeboat has been remedied structurally, not only reduced top deck impact area and impact pressure but also increased the modular factor of the roof deck in order to modified structure of the deck shape. Thus, it can be seen that the proposed method can be applied to improve the existing design of the FFLB.
Publication Date 2014-06-17
John-Kyu Hwang, Myung-Il Roh, Ju-Hwan Cha, "Design Modification of a Damaged Free-Fall Lifeboat for FPSO through the Free-Fall Test", Proceedings of ISOPE(International Society of Offshore and Polar Engineers) 2014, Busan, Korea, pp. 658-662, 2014.06.15-20

List of Articles
번호 분류 제목 Publication Date
196 International Conference Luman Zhao, Myung-Il Roh, Seung-Ho Ham, "Hardware-In-the-Loop Simulation for a Heave Compensator of an Offshore Support Vessel", Proceedings of OMAE 2016, Busan, Korea, pp. 1-5, 2016.06.19-24 file 2016-06-20
195 International Conference Ki-Su Kim, Myung-Il Roh, Sung-Kyoon Kim, "An Arrangement Design Framework for Ships and Offshore Plants Based on Expert System and Optimization Technique", Proceedings of OMAE 2016, Busan, Korea, pp. 1-5, 2016.06.19-24 file 2016-06-20
194 International Conference Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, Dong-Hoon Jeong, "Physics-based Simulation Considering Collision During Production and Installation of Ships and Offshore Plants", Proceedings of ICCGS 2016, Ulsan, Korea, 2016.06.15-18 file 2016-06-16
193 Conference Chairman 설계 및 법규 (A2, A3), 2016년도 대한조선학회 춘계학술발표회, 부산, 2016.05.19-20 2016-05-20
192 Domestic Conference 이성민, 노명일, 김기수, 함승호, "최적화 기법을 이용한 블록의 러그 배치 설계 방법", 2016년도 대한조선학회 춘계학술발표회, 부산, pp. 417, 2016.05.19-20 file 2016-05-20
191 Domestic Conference 김성훈, 노명일, 김기수, "하둡과 R 언어를 이용한 조선 해양 분야에서의 빅데이터 활용 연구", 2016년도 대한조선학회 춘계학술발표회, 부산, pp. 323, 2016.05.19-20 file 2016-05-20
190 Domestic Conference 정동훈, 노명일, 함승호, 이찬영, "함정 설계 단계에서의 성능 분석을 위한 시뮬레이션 프레임워크", 2016년도 대한조선학회 춘계학술발표회, 부산, pp. 326, 2016.05.19-20 file 2016-05-20
189 Domestic Conference 함승호, 노명일, 조로만, "통합 시뮬레이션 기법을 활용한 해양 작업 지원선 크레인의 AHC (Active Heave Compensator) HIL (Hardware-In-the-Loop) 시뮬레이션", 2016년도 대한조선학회 춘계학술발표회, 부산, pp. 335, 2016.05.19-20 file 2016-05-20
188 Domestic Conference 노명일, 김기수, 이성민, 함승호, "해양 프로젝트에서의 중량 추정의 불확실성에 대한 연구", 2016년도 대한조선학회 춘계학술발표회, 부산, pp. 6-8, 2016.05.19-20 file 2016-05-19
187 International Conference Myung-Il Roh, Seung-Ho Ham, Ki-Su Kim, Luman Zhao, "Integrated Simulation Based on Multiphysics Analysis, Virtual Reality, and Hardware for Offshore Installation, Operation, and Maintenance", OTC Asia 2016, 2016.03.22-26 file 2016-03-23
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