冰区船艏部连续破冰模式下破冰阻力数值计算研究

Numerical simulation on ice-breaking resistance under continuous ice-breaking mode with bow of ice-going ship

随着计算机技术的发展,数值计算方法已经成为研究冰区船航行性能的有效工具。本文在依托中国船舶科学研究中心小型冰水池(CSSRC SIMB)对破冰船艏部破冰阻力及破冰模式试验研究的基础上,采用离散元基本原理,建立离散元数值计算模型Bri-DEM,对连续破冰模式下船艏模型的破冰阻力进行数值计算,分析冰层破坏模式,并利用冰水池模型试验数据和经验公式对其进行校核,最后利用该计算模型对冰厚和船艏倾角的影响进行预报。研究成果可为冰区船舶冰阻力预报、航行性能评估和船型设计优化等提供有益的技术参考。

With the development of computer technology, the numerical simulation method has been an effective tool for the investigation of the navigation performance of ice-going ships. In this paper, based on the model test on an ice-breaking bow model in the small ice model basin of CSSRC, the numerical simulation model Bri-DEM was set up using the basic principle of discrete element method, the ice-breaking resistance under continuous ice-breaking mode with the bow model of an ice-going ship was calculated and the ice destruction pattern was analyzed. Meanwhile, the calculation result was verified by the experimental data and empirical formula. Finally, the influence of the ice thickness and bow angle on the ice-breaking resistance was predicted. The research can provide useful technical reference for ice resistance prediction, navigation performance evaluation and hull-line design optimization of ice-going ships.