NDLI: Study on the safety investigation of the free-fall lifeboat during the skid-launching test

Content Provider	IEEE Xplore Digital Library
Author	Hwang, J.-K. Dong-Uk Chung Sol Ha Kyu-Yeul Lee
Copyright Year	2012
Description	Author affiliation: Project Manager Team, Hyundai Samho Heavy Industries Co., Mokpo, Republic of Korea (Hwang, J.-K.; Dong-Uk Chung) \|\| Dept. of Naval Architecture & Ocean Engineering, Seoul National University, Seoul, Republic of Korea (Sol Ha; Kyu-Yeul Lee)
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 safety investigation of the free-fall lifeboat (FFLB) through the result of skid-launching free-fall test in the four falling phase, i.e., sliding phase, rotation phase, free-fall phase and water entry phase. In case of water entry phase, the damage of 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.
Starting Page	1
Ending Page	5
File Size	1776252
Page Count	5
File Format	PDF
ISBN	9781457720895
e-ISBN	9781457720918
DOI	10.1109/OCEANS-Yeosu.2012.6263585
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-21
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Boats Safety Shape Engines Accidents Mathematical model four falling phase free-fall lifeboat skid-launching test safety investigation impact pressure
Content Type	Text
Resource Type	Article

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