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| 1 | 船舶在碎冰区航行的离散元模型及冰载荷分析显示文摘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. | 李紫麟 刘煜 孙珊珊 卢云亮 季顺迎 | 2013 | 力学学报2013，45，6： | 30 |
| 2 | 平整冰与船舶结构相互作用的离散元分析显示文摘对于在冰区航行的船舶,冰荷载是其结构设计和安全航行的重要影响因素。采用离散单元法对船舶在平整冰区中航行的过程进行数值分析。平整冰由球形颗粒黏结而成,并考虑海流对海冰单元的浮力和拖曳力;当海冰单元间的作用力大于其冻结强度时,海冰发生破坏;船体结构由三角形单元构成,其在与海冰作用的过程中可确定各单元上的海冰作用力;通过海冰单元与船体单元间的接触作用可计算船体在冰区航行过程中的局部冰压力和总冰力。通过对船舶结构与海冰作用进行离散元分析,重点确定船体水线处海冰线荷载的分布规律,探讨航速和冰厚对船体线荷载及总冰力的影响。分析结果可为冰区船舶的结构设计和船舶在冰区安全航行提供科学依据。 | 蔡柯 季顺迎 | 2016 | 船舶与海洋工程2016，32，5： | 17 |
| 3 | 基于Logistic模型的北极海冰生长曲线研究显示文摘北极海冰季节变化明显,相关文献主要侧重于各海区海冰覆盖率的多年变化特征,尚未有针对海冰覆盖率生长和消融曲线的模型研究。本文引入Logistic曲线模型,以半封闭型的喀拉海为研究区域,定量分析北极海冰覆盖率增长过程,旨在给出一种海冰空间分布生长的统计模型。结果显示,拟合曲线与实测曲线相关性良好,不同时期的可决系数(R^(2))均大于0.99,均方根误差(RMSE)小于0.2。Logistic曲线模型总体上较好地拟合和重现了喀拉海1979—2018年海冰覆盖率由初冰期至盛冰期的增长变化过程,类似曲线模型可尝试用于其它海区的冰情统计研究。 | 段成林 董胜 王智峰 | 2021 | 海洋湖沼通报2021，，4： | 2 |
| 4 | GPU-Based DEM Simulations of Global Ice Resistance on Ship Hull During Navigation in Level Ice显示文摘The ice resistance on a ship hull affects the safety of the hull structure and the ship maneuvering performance in icecovered regions.In this paper,the discrete element method(DEM)is adopted to simulate the interaction between level ice and ship hull.The level ice is modeled with 3D bonded spherical elements considering the buoyancy and drag force of the water.The parallel bonding approach and the de-bonding criterion are adopted to model the freezing and breakage of level ice.The ship hull is constructed with rigid triangle elements.To improve computational efficiency,the GPU-based parallel computational algorithm was developed for the DEM simulations.During the interaction between the ship hull and level ice,the ice cover is broken into small blocks when the interparticle stress approaches the bonding strength.The global ice resistance on the hull is calculated through the contacts between ice elements and hull elements during the navigation process.The influences of the ice thickness and navigation speed on the dynamic ice force are analyzed considering the breakage mechanism of ice cover.The Lindqvist and Riska formulas for the determination of ice resistance on ship hull are employed to validate the DEM simulation.The comparison of results of DEM,Lindqvist,and Riska formula show that the DEM result is between those the Lindqvist formula and Riska formula.Therefore the proposed DEM is an effective approach to determine the ice resistance on the ship hull.This work can be aided in the hull structure design and the navigation operation in ice-covered fields. | HU Bing LIU Lu WANG De-yu JI Shun-ying | 2021 | China Ocean Engineering2021，35，2： | 1 |
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