| Résumé | Recent developments of offshore oil and gas reserves in several countries, together with economic studies to increase transportation through the Arctic, has led to a renewed interest in the maneuverability of vessels in ice. Despite the sizeable volume of work, there is not yet a universally accepted analytical method of predicting ship performance in ice. The Institute for Ocean Technology (IOT) of the National Research Council of Canada (http://www.iot-ito.nrc-cnrc.gc.ca/) has conducted physical, numerical and mathematical modeling of ship maneuvering characteristics in ice, as part of a larger effort to develop reliable modeling techniques to assist in the design of new ice-worthy vessels and in the simulation of their navigating characteristics. In this paper, the preliminary results of a series of physical and mathematical modeling are presented. As the yaw moment and turning radius are the important indicators of the maneuvering performance, this paper will focus on the interaction processes and the influence of ship motions on the yaw moment exerted on the ship hull. The dominant ice-ship interaction processes are identified. The results show large influence of ship motions and interaction geometry on the measured yaw moments. The geometrical aspect of the interaction processes is described and its influences on ice loads are discussed. Conclusions are made and recommendations for future works are provided. |
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