Abstract
This paper described a procedure for predicting the ice loads acting on a hull of an icebreaker that employs a six degrees-of-freedom (6-DOF) inertial measurement system method. Ice loads were calculated using the data measured in full-scale ice sea trials of the Korean ice breaking research vessel (IBRV) ARAON during her Arctic Ocean voyage in 2015. In the measured data, it was found that the sway, roll, and yaw motions were larger than other motions because the ship usually met with pack ice during her voyage. To calculate the maximum ice loads, the center of gravity (COG) approach and the point of impact (POI) approach were used. Ice loads ranged from 1.41 to 4.87 MN when estimated using the COG approach, and from 0.11 to 1.06 MN when estimated using the POI approach. The measured ice loads through the COG and POI approaches were compared with the resultant forces measured using strain gauges.
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