Prediction of ship resistance in level ice based on empirical approach

摘要

AbstractA semi-empirical model to predict ship resistance in level ice based on Lindqvist's model is presented. This model assumes that contact between the ship and the ice is a case of symmetrical collision, and two contact cases are considered. Submersion force is calculated via Lindqvist's formula, and the crushing and breaking forces are determined by a concept of energy consideration during ship and ice impact. The effect of the contact coefficient is analyzed in the ice resistance prediction. To validate this model, the predicted results are compared with model test data of USCGC Healy and icebreaker Araon, and full-scale data of the icebreaker KV Svalbard. A relatively good agreement is achieved. As a result, the presented model is recommended for preliminary total resistance prediction in advance of the evaluation of the icebreaking performance of vessels.Highlights?A simple semi-empirical method for resistance prediction in level ice is introduced.?Icebreaking force is determined by a concept of energy consideration during ship and ice impact.?Contact force is significantly influenced by the contact coefficient when predicting total resistance.?The accuracy of ice resistance prediction is confirmed by model test data.