摘要
基于CFD理论提出一种船舶周围水动力参数的辨识方法。以某型号驱逐舰船模为研究对象,对其典型剖面在静水中横摇进行CFD二维数值模拟,通过最小二乘法拟合得到船舶典型剖面水动力附加质量系数和阻尼系数,再沿船长积分得到船舶周围的等效水动力参数,并分析舭龙骨对横摇力矩的影响。研究结果表明,该参数辨识方法能有效得到船舶周围水动力参数,且具备较高的计算效率。此外,加装舭龙骨对船舶横摇稳定性的提升有着显著作用。
Based on the CFD theory,a method to identify the hydrodynamic parameters around the ship is presented.Taking the ship model of a certain destroyer as the research object,the roll in dead water is numerically simulated.The hydrodynamic additional mass and damping coefficient are obtained by fitting with the least square method.Thus,the equivalent hydrodynamic parameters around the ship are acquired from integral along the length of the ship and the influence of bilge keel on roll moment is analyzed.The results show that the proposed parameter identification method can effectively obtain the hydrodynamic parameters around the ship,and the calculation efficiency is high.Furthermore,the addition of bilge keel has a significant effect on improving the stability of the ship rolling.
作者
席海峰
王神龙
徐亚杰
XI Haifeng;WANG Shenlong;XU Yajie(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《船舶工程》
CSCD
北大核心
2021年第6期49-55,共7页
Ship Engineering
基金
国家自然科学基金青年项目(11602142)。
关键词
船舶横摇运动
CFD数值模拟
参数辨识
阻尼系数
附加质量
ship rolling motion
CFD numerical simulation
parameter identification
damping coefficient
added mass
