摘要
吊舱推进装置在极地船舶中被广泛应用,其转舵模块可以带动螺旋桨摆动从而产生任意方向的推进力,使船舶操纵更为灵活。提出了一种吊舱推进船舶冰区操纵的离散元方法,对具有吊舱推进装置的冰区船舶破冰过程进行了数值模拟。以“雪龙2”号破冰船为研究对象,计算分析了船舶定速直航时的冰阻力,并通过与Lindqvist经验公式的对比验证了冰阻力计算的合理性。在此基础上进一步对船舶在不同冰厚、不同吊舱转向角下的回转破冰运动进行了离散元模拟,分析了回转半径与船长比值随冰厚的变化规律。计算结果表明:船舶的回转性能随冰厚的增大而降低,并随吊舱转向角的增大而显著提高。
The pod-propulsion systems are widely applied in polar ships.The steering module in pod can drive the propeller to swing and generate thrust in any direction,and improve the maneuvering capability in ice covered regions.In this paper,a discrete element method(DEM)for maneuverability of a pod-driven ship in ice covered region is proposed,and used to simulate numerically the icebreaking process of a pod-driven icebreaker.Taking the Icebreaker Xuelong 2 as an example,the ice resistance of the straight-line navigation at a constant velocity is calculated with DEM.Compared with the ice resistance analyzed with the Lindqvist Formula,the rationality of ice resistance simulated with DEM is validated well.The ice breaking motions under different ice thicknesses and pod's deflections are also simulated with DEM,and the ratio between the turning circle radius and the ship length is analyzed.The simulated results shows that the turning ability of ship decreases with the increase of ice thickness,and improves with the increase of the pod's deflection.
作者
邓恺其
王祥
季顺迎
DENG Kaiqi;WANG Xiang;JI Shunying(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China)
出处
《海洋工程》
CSCD
北大核心
2023年第3期96-109,共14页
The Ocean Engineering
基金
国家自然科学基金资助项目(42176241,U20A20327,52192693)
工信部极地船舶专项资助项目(2021-342)。
关键词
吊舱推进装置
极地船舶
离散元方法
冰区回转性能
冰阻力
pod-propulsion systems
polar ship
DEM
turing ability in ice covered region
ice resistance
