基于黏流的三体船片体布局优化  

Layout Optimization of Trimaran Side Hulls Based on Viscous Flow

作　　者：魏亚博 王建华[1] 万德成[1] WEI Yabo;WANG Jianhua;WAN Decheng(Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船海计算水动力学研究中心(CMHL),船舶海洋与建筑工程学院,上海200240

出　　处：《中国造船》2022年第4期133-142,共10页Shipbuilding of China

基　　金：国家重点研发计划项目(2019YFB1704200);国家自然科学基金项目(52131102,51879159)。

摘　　要：三体船片体布置对全船阻力和耐波性有重要影响。论文以一艘三体船为研究对象,采用基于黏流的naoe-FOAM-SJTU求解器预报母型船在Fr=0.18,波长-船长比为1.1时迎浪规则波中的纵摇和垂荡运动。利用船型优化软件OPTShip-SJTU,通过改变片体布置对该船的耐波性开展优化设计。为了减小计算工作量,依据优化拉丁方试验设计,批量评估水动力性能并建立克里金近似模型。通过多目标遗传算法得到优化船型,并对其进行CFD验证,以确保优化结论的可靠性。研究结果表明,合理地设计三体船主体和片体的间距可减轻它们间的兴波干扰并改善其耐波性能。The position of trimaran’s side hulls has a vital influence on the overall resistance and seakeeping of the trimaran.This paper takes a trimaran as the research object and uses the viscous flow-based solver naoe-FOAM-SJTU to predict both pitch and heave motions of the parent ship in head sea regular waves when Fr=0.18 and wavelength-to-ship length ratio is 1.1.After comparing it with the experimental result,the ship optimization software OPTShip-SJTU is used to optimize the seakeeping performance of the trimaran by changing spacing of the side hulls.In order to reduce the amount of calculation and the total time for the optimization,evaluation of hydrodynamic performance is carried out according to the method of Optimal Latin hypercube sampling,and the Kriging approximation model was established.By using the multi-objective genetic algorithm,optimized hull forms can be finally obtained,which reliability is verified by CFD.The results show that reasonable design of the trimaran spacing can reduce interference of wave making of side hulls to the main hull,and improve seakeeping performance of the trimaran.

关 键 词：三体船 naoe-FOAM-SJTU求解器 耐波性 OPTShip-SJTU 

分 类 号：U661.31[交通运输工程—船舶及航道工程]