极地研究

极地研究 ›› 2018, Vol. 30 ›› Issue (4): 406-410.DOI: 10.13679/j.jdyj.20180008

• 研究论文 • 上一篇    下一篇

破冰结构角度对整冰失效模式的影响分析

白旭  周利  陶冶   

  1. 江苏科技大学船舶与海洋工程学院, 江苏 镇江 212003
  • 收稿日期:2018-02-28 修回日期:2018-04-17 出版日期:2018-12-30 发布日期:2018-12-30
  • 通讯作者: 周利
  • 基金资助:

    国家自然科学基金面上项目(51879125)、江苏省高校自然科学研究重大项目(18KJA580003)、江苏省自然科学基金 (BK20170576)、江苏省高等学校自然科学研究项目(17KJB580006)、上海交通大学海洋工程国家重点实验室研究基金(1704)资助

Slope angle of icebreaking structure and failure modes in level ice

Bai Xu, Zhou Li, Tao Ye   

  • Received:2018-02-28 Revised:2018-04-17 Online:2018-12-30 Published:2018-12-30
  • Contact: Li ZHOU

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摘要：

破冰船破冰过程中整冰的失效模式对于冰载荷的估算十分重要。本文基于力学方法分析了破冰船破冰过程中破冰结构与整冰的相互作用, 得到了影响冰体失效的冰力分量与破冰结构参数的表达关系, 进而确认冰摩擦系数以及坡度角与冰体失效模式的关系。依据北极海冰的摩擦系数范围, 指出当破冰船破冰结构坡度角小于70°时, 冰体发生弯曲破坏, 当坡度角处于70°—82°时, 冰体同时发生弯曲和挤压失效, 当坡度角大于82°时, 冰体仅发生挤压失效,同时给出了不同失效模式下冰力的计算方法。

关键词: 破冰船, 破冰结构, 整冰, 失效模式

Abstract:

Understanding of ice failure modes is very important for the estimation of the forces needed in icebreaking. This paper analyzed the mechanics of crushing during ice-structure interactions. The ice breaking force component can affect the ice failure mode, and its variation with the dimension of the icebreaking structure was investigated to further confirm the relationships between friction, slope angle and ice failure mode. On the basis of a range of friction coefficients of sea ice, it is concluded that bending failure occurs when the slope angle of the structure is below 70o. Crushing and bending failure occurs simultaneously when the slope angle lies between 70° and 82°. When the slope angle is above 82°, only crushing failure occurs. A model to derive the ice breaking force under different failure modes was presented.

Key words: icebreaker, icebreaking structure, level ice, failure mode