摘要
[目的]船舶横摇的准确预报对于船舶耐波性、稳性以及操纵性的研究具有十分重要的意义,但船舶横摇运动受流场粘性效应的影响很大,计算中存在较多非线性因素,因而并不适于常用于研究船舶运动的传统势流理论。为解决这一问题,[方法]采用基于OpenFOAM软件开发的naoe-FOAM-SJTU求解器,分别通过欧拉方法和RANS方法对S60船模典型二维横剖面的强迫横摇进行数值模拟,同时,模拟分析DTMB 5512不同三维船模的自由与强迫横摇运动。[结果]在成功将横摇阻尼力矩的不同成分分别计算出来后发现,其中漩涡阻尼所占的比例最大,摩擦阻尼所占的比例最小,而舭龙骨在一定的横摇角度范围内则减小了横摇阻尼力矩。[结论]该结果揭示了横摇参数对船舶横摇运动及横摇阻尼力矩的影响,对准确预报船舶的横摇运动具有重要意义。
During the ship design procedure,the analysis of ship rolling motions is of great significance because the rolling motions have extraordinary effects on the sea-keeping,maneuverability and stability of a ship.It is difficult to simulate rolling motions due to the effect of viscosity,which causes many nonlinear components in computation.As such,the potential theory used for other ship motions cannot be used for rolling motions.This paper simulates the rolling motions of the DTMB5512ship model and the ship transverse section of the S60ship model with a naoe-FOAM-SJTU solver using the Reynolds Averaged Navier Stokes(RANS)method based on the OpenFOAM.The results of rolling motions are compared with the experimental data,which confirms the reliability of the meshes and results.For the ship transversesection of the S60ship model,the damping coefficient is divided into three parts with the Euler and RANSmethods:friction,vorticity and wave parts.For the DTMB5512ship model,the damping coefficient is also respectively analyzed,including the friction,vorticity,wave and bilge keel parts.The results in this papershow that the vorticity part accounts for the greatest proportion,while the friction part accounts for the least,and the bilge keels reduces the damping moment to a certain extent which shows the effect of rolling parameters on rolling motions and moments.
作者
罗天
万德成
LUO Tian;WAN Decheng(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)
出处
《中国舰船研究》
CSCD
北大核心
2017年第2期1-11,48,共12页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51379125
51490675
11432009
51579145)
长江学者奖励计划(T2014099)
上海高校东方学者特聘教授岗位跟踪计划(2013022)
工信部数值水池创新专项VIV/VIM项目(2016-23/09)
