著者

大塚 夏彦 大西 富士夫 泉山 耕

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B3(海洋開発) (ISSN:21854688)

巻号頁・発行日

vol.73, no.2, pp.I_25-I_30, 2017 (Released:2017-08-22)

参考文献数

8

被引用文献数

1

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2010年以降,北極海航路による東西輸送が拡大中である.当初は燃料や資源の高騰を背景とした欧州・アジア間輸送が拡大し,それが2014年に急減した後は,ロシア北極海沿岸の資源開発が駆動力となって,輸送貨物量は増大傾向にある.夏期北極海では海氷減少が進行中で,船舶の航行環境は緩和しつつあり,近年は多様な船が夏の北極海港航路を航行する様になってきた.北極海航路の輸送距離短縮により,燃料費や船体償却が低減され,ロシアの砕氷船料金などのコスト増を相殺する効果が出る.これにより,バルク貨物は輸送コスト削減が実現しやすい.当面はロシア北極海沿岸での天然資源開発に関連するバルク貨物が,北極海航路の主要貨物となって,海上輸送が拡大していくと考えられる.

著者

岸 進 宇都 正太郎 加納 敏幸 上園 政裕 川島 義伸 泉山 耕

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

vol.1996, no.180, pp.99-111, 1996 (Released:2009-09-16)

参考文献数

19

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The patrol icebreaker “TESHIO” was built and delivered to the Japan Maritime Safety Agency in Autumn 1995. Full-scale trials in ice were conducted at the Sea of Okhotsk in February, 1996. Several kinds of test were performed in order to confirm her performance such as continuous ice-breaking, ramming and stopping performance, turning capability and zigzag course manoeuvrability, and coordinated ice-breaking operation together with the patrol icebreaker “SOYA”.While her design and construction were in process, series of model test were carried out both in ice and in ice-free water as the joint research project between Ship Research Institute, Ministry of Transport and NKK Corporation. At the ice model basins of the two organizations, comprehensive model tests in ice were conducted which included resistance and self-propulsion tests in various ice conditions, ramming and turning tests in level ice.This paper describes the results of model and full-scale tests of “TESHIO” and their correlation for both continuous ice-breaking and ramming performance.In order to predict the required BHP for the continuous ice-breaking in level ice, the propulsion coefficient was decomposed into three parts which denote effects of open water characteristics, overload and propulsor/ice interaction, respectively. The thrust deduction coefficient obtained from towed propulsion tests in ice showed very good agreement with that from overload tests in ice-free water. The predicted BHP showed good agreement with the full-scale results when the effect of propulsor/ice interaction was taken into consideration.A prediction formula for ramming penetration distance was devised using an energy-based method. Correlation of both the model and full scale data to the prediction results showed that thrust loss due to the propulsor/ice interaction and the automatic overload protection control of the main engine had much influence on the prediction of ramming performance.