极地双向破冰船破冰能力评估分析

Evaluation and analysis of ice breaking capacity of a double-acting polar ship

破冰能力是衡量极地船舶航行性能优劣的重要指标。本文在基于预设冰网格技术的连续破冰阻力数值模拟理论基础上,根据连续破冰阻力与净推力的不同平衡方式提出静态和动态2种极地船舶破冰能力数值评估方法。以某极地双向破冰油船为研究对象,分别采用静态和动态方法对其破冰能力进行数值评估,并与对应的冰水池模型试验结果进行对比分析。结果表明,静态和动态破冰能力评估方法获得的1kn航速对应的最大破冰厚度与模型试验结果较为吻合,2种方法评估结果均显示极地油船首向破冰能力强于尾向破冰能力,与实际情况相符,验证了2种破冰能力评估方法的可行性,可为极地船舶初始设计阶段性能预估提供有效工具。

Ice breaking capacity is an important index to measure the navigation performance of polar ships.Based on the numerical simulation theory of continuous ice breaking resistance based on preset ice grid technology,according to the different balance modes of continuous ice breaking resistance and net thrust,this paper proposes two numerical evaluation methods of polar ship ice breaking capacity,static and dynamic.Taking a double-acting polar tanker as the research object,the static and dynamic methods are used to evaluate its ice breaking capacity,and the results are compared with the corresponding ice tank model test results.The research results show that the maximum ice breaking thickness corresponding to 1 kn speed obtained by the static and dynamic ice breaking capacity evaluation methods is close to the model test results.The evaluation results of the two methods show that the ice breaking capacity of the double-acting polar tanker in the bow direction is stronger than that in the stern direction,which is consistent with the actual situation.The feasibility of the two ice breaking capacity evaluation methods is verified,which can provide an effective tool for the performance prediction of the polar ships in the initial design stage.