带舭龙骨船体的横摇自由衰减的数值研究  

Numerical study for free-roll damping of a ship with bilge

作　　者：姜宜辰 赵晓杰 宗智[1,2,3] JIANG Yichen;ZHAO Xiaojie;ZONG Zhi(School of Naval Architecture,Dalian University of Technology,Dalian 116024,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian 116024,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]高新船舶与深海开发装备协同创新中心,上海200240 [3]工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2019年第1期81-87,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51679037;51279030)

摘　　要：为了研究带舭龙骨的船体横摇自由衰减运动,本文建立了基于Open FOAM的粘性流场数学模型。模型采用六自由度运动方程与动网格技术计算船舶运动,应用阻尼消波技术消除远处的数值水池壁面产生的反射波,有效提高了数值预报的精度;通过对比模拟得到的衰减曲线和阻尼系数与试验所得的结果,分析了舭龙骨附近的涡量场,并探讨了舭龙骨减摇的机理。结果表明本文建立的数值模型可以准确地模拟船体横摇运动,成功预报了不同高度舭龙骨的减摇效果。To investigate the free-roll damping of a hull with bilge keel,a viscous flow field model was established based on the open source software open field operation and manipulation(OpenFOAM),using a six degree of freedom(6 DOF)model and dynamic grid technology to solve the ship motion.The radiation wave in the position far from the ship was eliminated by a wave damping absorber method,which can improve accuracy in the numerical prediction.The simulated free-roll damping curves and damping coefficients were compared with experimental data,and the vorticity field near the bilge keel was analyzed.The mechanism of roll decaying by the bilge keel was also discussed.The results showed that the model can accurately simulate the free-roll of the ship and successfully predict the roll damping effects of bilge keels of different heights.

关 键 词：横摇衰减 舭龙骨 OPENFOAM 阻尼消波 动网格 六自由度 粘性流场 数值模拟 

分 类 号：U661.1[交通运输工程—船舶及航道工程]