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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
145 Domestic Conference 하솔, 구남국, 노명일, 이규열, 함승호, 김기수, "선박 및 해양 플랜트의 설계 및 생산을 위한 다물체계 동역학 시뮬레이터 개발", 2014년도 대한조선학회 추계학술발표회, 창원, pp. 208-212, 2014.11.06-07 file 2014-11-07
144 Domestic Conference 이규열, 하솔, 노명일, "해양 시추 안전 설계", 2014년도 대한조선학회 추계학술발표회, 창원, pp. 967-978, 2014.11.06-07 file 2014-11-07
143 Domestic Conference 홍정우, 함승호, 이혜원, 노명일, 하솔, "크레인 붐의 유연성를 고려한 Subsea 장비의 인양 시뮬레이션", 2014년도 대한조선학회 추계학술발표회, 창원, pp. 958-962, 2014.11.06-07 file 2014-11-07
142 International Conference Sol Ha, Seung-Ho Ham, Myung-Il Roh, "Dynamic Route Guidance for Evacuation, Escape and Rescue System at an Offshore Platform Considering Real-time Hazard Avoidance", Proceedings of the 28th Asian-Pacific TEAM 2014, Istanbul, Turkey file 2014-10-15
141 International Conference Hye-Won Lee, Seung-Ho Ham, Jeong-Woo Hong, Sol Ha, Myung-Il Roh, "Motion Analysis of a Heavy Load Suspended by a Floating Crane Using Constraint-based Wire Rope based on Discrete Variational Method", Proceedings of the 28th Asian-Pacific TEAM 2014 file 2014-10-15
140 International Conference Myung-Il Roh, Sol Ha, Nam-Kug Ku, Seung-Ho Ham, "Multibody System Dynamics Simulator for Design and Production of Ships and Offshore Plants", Proceedings of the 28th Asian-Pacific TEAM 2014, Istanbul, Turkey, pp. 481-494, 2014.10.13-16 file 2014-10-15
139 Domestic Conference 함승호, 이혜원, 홍정우, 하솔, 노명일, "Discrete Euler-Lagrange Equation을 적용한 해상 크레인과 중량물의 운동 해석", 2014년도 대한조선학회 추계학술발표회, 창원, pp. 944-949, 2014.11.06-07 file 2014-11-07
138 Domestic Conference 김기수, 홍정우, 하솔, 구남국, 노명일, 김성용, "전문가 시스템과 최적화 기법을 기반으로 한 잠수함의 배치 방법", 2014년도 대한조선학회 추계학술발표회, 창원, pp. 456-461, 2014.11.06-07 file 2014-11-07
137 Domestic Conference 하솔, 이규열, 노명일, 황호진, 구남국, "정적 해석을 이용한 블록 리프팅 설계 및 해석", 2014년도 대한조선학회 춘계학술발표회, 부산, pp. 419-420, 2014.05.22-23 file 2014-05-23
» International Conference 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, 2014.06.15-20 file 2014-06-17
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