The Resistance of Ice Breaking Ships Based on Model Tests

摘要

The two most important tasks of ice breaking ships are first to secure a sailing route by breaking the thick sea ice andrnsecond to sail efficiently herself for purposes of exploration and transportation in the polar seas. The resistance of icernbreaking ships is a priority factor at the preliminary design stage; not only must their sailing efficiency be satisfied,rnbut the design of the propulsion system will be directly affected. Therefore, the performance of ice-breaking ships mustrnbe accurately calculated and evaluated through the use of model tests in an ice model basin before construction starts.rnIn this paper, a new procedure is developed, based on model tests, to estimate a ship’s ice resistance during continuousrnicebreaking in level ice. Some of the factors associated with crushing failures are systematically considered in orderrnto correctly estimate her ice-breaking resistance, while the effects of the hull geometry, as reflected in the length,rnbreadth, and draft of ships, are considered in calculating buoyancy and clearing resistance. Multiple regressionrnanalysis is calculated with each ice resistance component. This study is intended to contribute to the improvement ofrnthe techniques for ice resistance prediction with ice breaking ships.