Long-term Fatigue Monitoring For LNG Carriers (eBook)

Published Date

January 2005

Long-term Fatigue Monitoring For LNG Carriers (eBook)

$19.45
(Excludes any applicable taxes)

A comparative study of the actual stress caused by wave conditions and its real impact on fatigue strength (10pp)

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Fatigue strength of ship structures is one of the most important items involved in the maintenance of ships. It is well known that fatigue strength very much depends on the actual wave conditions that the ship encounters. The difference between design and actual wave conditions is important for assessing a ship's fatigue strength after a long period of service. Against this background, a fatigue-monitoring program is being carried out on a 135,000m3 MOSS-type LNG carrier that trades between Oman and Japan. The monitoring system covers a wide range of measurement items, including stress in local hull structure and the cargo tank system. Three years of data has already been analyzed and reviewed. Measurement is being continued in order to collect data for lifetime maintenance and longevity study.

This paper presents:
- An introduction of the monitoring system and assessment scheme
- a comparative study of actual stress with ship's design condition
- a proposal for lifetime maintenance of LNG carriers based on a long-term fatigue monitoring system.

Paper Delivered by:
Koichi Sato (Mitsubishi Heavy Industries Ltd)
Hiroyuki Ohira (Mitsubishi Heavy Industries Ltd)
Motoki Tatani (Osaka Gas Co., Ltd)
Taizo Yoshida (NYK LINE)

Prepared for:
Gastech Bilbao 2005

Title: Long-term Fatigue Monitoring For LNG Carriers (eBook)
Product Code: 4433g083
Published Date: January 2005

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