航海模拟器中破冰船破冰阻力数值计算
Numerical calculation of the icebreaking resistance of an icebreaker in a marine simulator
王晓雪 1张秀凤 2刘兆春 2孟耀2
作者信息
- 1. 浙江师范大学 工学院,浙江 金华 321004
- 2. 大连海事大学 航海学院,辽宁 大连 116026
- 折叠
摘要
为研究破冰船在平整冰区所做的直航连续式破冰作业,本文通过非线性显式的有限元方法,模拟了"雪龙 2号"科考船在平整冰中的连续破冰过程,分析了船体所受碰撞力特性以及能量变化,并利用破冰船Terry Fox号船模水池试验与"雪龙2号"无量纲化冰阻力系数的数值计算结果对比,证明了本文数值计算的可靠性;本文数值计算结果与经验公式进行对比分析,误差在20%之内,进一步验证了本文数值模拟的正确性;利用"雪龙2号"简化后的楔形体模型,本文研究了船体不同速度、不同破冰角度以及平整冰厚度时船-冰碰撞的响应特性,定性分析了不同工况下的船-冰碰撞过程中船舶受到的碰撞力、能量损耗等规律.同时,利用简化模型楔形体对船舶破冰阻力的参数敏感度进行研究,有利于获得破冰阻力随多参数变化的规律,将在不同工况下得到的破冰阻力平均值利用矩形域最小二乘法曲面拟合出破冰阻力公式.建立适用于运动数学模型实时解算的破冰阻力离线数据库,利用插值方法实时获得冰阻力,为冰区航海模拟器船舶运动数学模型中的冰阻力计算提供一定参考.
Abstract
To study the direct-route continuous icebreaking operation of an icebreaker in the level ice area,this pa-per simulates the continuous icebreaking process of the"Xuelong 2"research vessel in the level ice by using the nonlinear explicit finite element method,analyzes the characteristics of the collision force and energy changes of the hull.Next,the study uses the model pool test of the icebreaker,Terry Fox,to compare with the numerical calcula-tion results of the dimensionless ice resistance coefficient of the"Xuelong 2",thus verifying the reliability of the numerical calculation.The numerical calculation results are compared with the empirical formula proposed by Lindqvist and Jeong,which shows an error within 20%,further verifying the correctness of the numerical simulation demonstrated in this paper.Using the simplified wedge model of"Xuelong 2",this paper studies the response characteristics of a ship-ice collision at different hull speeds,different icebreaking angles and thicknesses of the lev-el ice,qualitatively analyzing the laws of collision force and energy loss of a ship during the ship-ice collision under different working conditions.Concurrently,the parameter sensitivity of the icebreaking resistance is studied by u-sing a simplified model wedge,which is beneficial in obtaining the law of the icebreaking resistance changing with multiple parameters,and the average values of the icebreaking resistance obtained under different working condi-tions are fitted into the icebreaking resistance formula by using the rectangular domain least squares curved surface.By establishing an offline database of the icebreaking resistance applicable to the real-time solution of the motion mathematics model and using the interpolation method to obtain the ice resistance in real time,a proper reference can be provided for calculating ice resistance in the motion mathematics model evaluating the motion of a navigation simulator running in an icy area.
关键词
冰区船舶/平整冰/有限元分析/船-冰碰撞/数值仿真/航海模拟器Key words
ship in ice area/level ice/finite element analysis/ship-ice collision/numerical simulation/marine simulator引用本文复制引用
基金项目
国家重点研发计划(2022YFB4301402)
国家自然科学基金(51779029)
出版年
2024
国家科技期刊平台
NSTL
万方数据