A study of a Fatigue Management System for LNG Carriers using a New Fatigue Damage Sensor :
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A pro-active safety management system for ship structures which quantifies the effects of aging, such as deterioration of the ship's structural integrity due to fatigue and corrosion, is proposed as a new approach to the structural surveys of ships that have conventionally been made under a more passive management system. Some of the authors have developed a compact fatigue damage sensor that when attached can detect accumulated fatigue damage in welded structures. The authors have applied this sensor to the hull structures of an LNG carrier for experimental purposes, ascertained its long-term durability under the severe environments to which the ship was exposed, and obtained quantitative data on the accumulated fatigue damage. In this paper, the authors introduce a fatigue management system using this sensor called the Hull Aging Management System (HAMS) and propose it as a pro-active safety management system for LNG carrier hull structure aging and introduce a method to improve the accuracy of accumulated fatigue damage detection by using this sensor.
- ClassNK technical bulletin
ClassNK technical bulletin 26, 9-20, 2008
Nippon Kaiji Kyokai