EI、Scopus 收录
中文核心期刊

船舶在碎冰区航行的离散元模型及冰载荷分析

ANALYSIS OF SHIP MANEUVERING PERFORMANCES AND ICE LOADS ON SHIP HULL WITH DISCRETE ELEMENT MODEL IN BROKEN-ICE FIELDS

  • 摘要: 采用离散元模型对碎冰区浮冰与船舶结构的相互作用进行了数值研究。碎冰由三维圆盘单元构成,并考虑其在海流作用下的浮力、拖曳力和附加质量。船体结构由一系列三角形单元组合构造。通过海冰与船体单元间的接触判断和接触力计算,确定海冰与船体结构之间的相互作用。采用以上离散单元模型对不同冰况(冰速、冰厚、冰块尺寸和密集度)以及航速条件下,海冰对船体的动力作用过程进行了数值分析,对比分析了以上因素对船体冰载荷的影响,可为冰区船舶的安全运行和结构设计提供一定的借鉴作用。

     

    Abstract: With the development of navigation channels in Arctic regions and oil/gas exploitations in cold fields, the investigation of ice load on ship hull is required urgently in offshore engineering under various ice and maneuvering conditions. In this paper, the discrete element method (DEM) is adopted to simulate the interactions between drifting ice floes and a moving ship. The pancake ice floes are modeled with three-dimensional discrete elements considering the buoyancy, drag force and added mass of current. The ship hull is constructed with triangle elements. The interaction between ice floe and ship hull is determined through element contact detection and impact force calculation. The influences of ice conditions (current velocities and directions, ice thicknesses, concentrations and ice floe sizes) and navigational speed on the dynamic ice forces of ship hull are examined. This work is of reference value to the ship structure design and the navigation security in ice-covered fields reseaches.

     

/

返回文章
返回