Rankine源法的船舶下沉量数值计算初步研究  

Preliminary Study on Squat Numerical Computation Based on the Rankine Source Method

作　　者：陈丽宁 CHEN Li-ning(School of Navigation,Guangzhou Maritime University,Guangzhou Guangdong 510725,China)

机构地区：[1]广州航海学院海运学院,广东广州510725

出　　处：《广州航海学院学报》2018年第4期10-14,共5页Journal of Guangzhou Maritime University

基　　金：广州航海学院创新强校项目资助(2017E51;F410401)

摘　　要：船舶下沉量是影响船舶安全富余水深的重要因素,具有一定的研究价值.本文对基于Rankine源法的船舶下沉量数值计算进行了初步研究,该方法是一种基于势流理论的边界元法.使用Rankine源法计算船舶下沉量时,首先在船体、自由面、岸壁等边界上分布一系列Rankine源面;进而对边界条件线性化,将源强带入边界条件,建立源强的线性方程组;用迭代法求解该线性方程组,获得源强值,根据源强值计算出船体水动力、力矩和下沉量.研究结果表明,该方法计算船舶下沉量精度较高.Squat is an important factor in computing the under keel clearance of a ship,so it is worthy being studeid.The author of the paper preliminarily studies squat computation based on the Rankine source method.When the method is used to compute squat,Rankine source panels are distributed on the boundaries such as the hull,free surface and wall surface of the channel.Further,the boundary condition is linearized,the source strength is added to the boundary condition,and the system of linear equations of the source strength is established.The iteration method is applied to get the value of the source strength.Based on the computed strength value,we can get the ship hydrodynamics,moment and squat of the ship.Study shows that precision of the computed squat is high.

关 键 词：势流 船舶下沉量 RANKINE源 

分 类 号：U661.1[交通运输工程—船舶及航道工程]