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research-article

Effects of Weather Routing on Maximum Vertical Bending Moment in a Ship Taking Account of Wave-induced Vibrations

[+] Author and Article Information
Kazuhiro Iijima

Department of Naval Architecture and Ocean Engineering, Osaka University, 2-1 Yamadaoka Suita, Osaka 5650871, Japan
iijima@naoe.eng.osaka-u.ac.jp

Rika Ueda

Department of Naval Architecture and Ocean Engineering, Osaka University, 2-1 Yamadaoka Suita, Osaka 5650871, Japan
Rika_Ueda@naoe.eng.osaka-u.ac.jp

Hitoi Tamaru

Department of Maritime Systems Engineering, Tokyo University of Marine Science and Technology, 2-1-6 Etchujima Koto-ku, Tokyo 135-8533, Japan
tamaru@kaiyodai.ac.jp

Masahiko Fujikubo

Department of Naval Architecture and Ocean Engineering, Osaka University, 2-1 Yamadaoka Suita, Osaka 5650871, Japan
fujikubo@naoe.eng.osaka-u.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4041997 History: Received January 04, 2018; Revised August 17, 2018

Abstract

In this paper, the effect of weather routing and ship operations on the extreme vertical bending moment in a 6000TEU class large container ship which is operated in North Atlantic Ocean, is addressed. Direct time-domain nonlinear response simulation method taking account of the wave-induced vibrations is used in a combined manner with voyage simulations based on 10 years of meteorological data in the area. The probability distribution of the ship's operational parameters conditional upon the meteorological conditions, is considered. It is clarified that the severest wave condition with the significant wave height over 16m in the area, may not be encountered by the ship due to the weather routing and the extreme value is determined mostly by the wave condition much milder than the severest in the area. It is also found out that the ship speed assumed in the most contributing sea state strongly affects the extreme value of the total vertical bending moment since the wave-induced vibrations in the ship tends to be excited at faster speed.

Copyright (c) 2018 by ASME
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