A Study of the Change of Ship Speed according to the Ice Load Signal during Slow Ramming

• Published in: Journal of Ocean Engineering and Technology
• Main Authors: Se-Jin Ahn, Tak-Kee Lee
• Format: Article in Journal/Newspaper
• Language: English
• Published: The Korean Society of Ocean Engineers 2019
• Subjects: ramming; continuous icebreaking; ice load signal; time-history; relationship between peak signal and ship speed; Ocean engineering; TC1501-1800; Arctic; Antarctic; Antarc*; Icebreaker; Sea ice; ice covered waters
• Online Access: https://doi.org/10.26748/KSOE.2019.086; https://doaj.org/article/066b30a4039e436b8ac88043f0714df3

Recently, researchers in Korea and abroad actively have conducted research activities using the ARAON, a Korean icebreaking research vessel. The ARAON regularly conduct research activities in the Arctic and Antarctic waters every year. The icebreaking mode, which can be either continuous breaking or ramming, is determined by the conditions of the ice and the ice-covered waters. When the icebreaker encounters thick sea ice or an ice ridge, ramming is used. At that time, the speed of the ship generally is slower than that of continuous icebreaking. In this study, the ice load signal at the time of repetitive ramming during ARAON’s 2012 Antarctic research voyage was analyzed. The time history of the ice load signal and the change in the speed of the ship used in ramming were compared with these values during continuous icebreaking.