Abstract
The estimation of ship speed in ice ridge fields is important for both route planning and prediction of emergency response time. An analytical method for estimating ship motion in first-year ice ridge is developed based on ice resistance models and ship motion equations, in which the effect of ship speed on ridge resistance is taken into account. Two model tests in level ice and one model test in ice ridge for an icebreaking multipurpose vessel are used to validate and benchmark the presented method. The predicted results including level ice resistances, net thrust and ship motion in the ice ridge field are compared with the model test data. The comparisons show that the presented method can generate reasonable results. The effects of input parameters on ship speed, penetration depth and number of necessary rams to transit ridge have been studied. Based on the calibrated model, insights into the ice resistance and the ship motion are obtained. It is found that the energy consumption of the keel obtained by integral calculation of the keel resistance at the penetration distance is with the same magnitude as the result of the maximum keel resistance multiplied by the ridge length. In addition, the effect of ridge width and keel depth on keel resistance and average transit speed is investigated.
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Foundation item: This work was financially supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20200998) and the National Natural Science Foundation of China (Grant Nos. 52171311, 52271279, and 51579130).
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Song, M., Yuan, W., Liu, K. et al. Analysis of Ship Motion in An Ice Ridge Field Based on Empirical Approach. China Ocean Eng 37, 912–922 (2023). https://doi.org/10.1007/s13344-023-0076-5
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DOI: https://doi.org/10.1007/s13344-023-0076-5