基于势流模型的双体船耐波性能研究  

Research on seakeeping performance of catamaran based on potential flow model

作　　者：李张翰熠 张新曙[1,2] LI Zhanghanyi;ZHANG Xinshu(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《海洋工程》2023年第1期57-67,共11页The Ocean Engineering

基　　金：工信部高技术船舶科研资助项目(MC-201917-C09)。

摘　　要：双体船由于其优良的快速性和横稳性等特性,在民用和军用中应用广泛。针对无限水深下迎浪、斜浪中自由运动的WigleyⅢ双体船,利用线性势流软件WAMIT,通过调整片体间距,对双体船的水动力系数及船体运动响应进行计算和比较,分析不同片体间距的双体船的耐波性。结果发现,片体间距较小的双体船附加质量系数较小,垂荡、纵摇阻尼系数显著增大,垂荡和纵摇运动响应幅值增大,且附加质量系数为负值时的系数绝对大小和频率范围随着片体间距的减小而变大。同时,片体间距越小的双体船间的流体干扰作用令自由面运动响应更加剧烈,迎浪下船体垂荡运动响应略有增大,纵摇运动响应略有减小;而斜浪下垂荡、纵摇、横摇运动响应均增大,船体的耐波性较差。当片体间距较大,在某一频率入射波下,双体船运动响应接近为零,且该频率随着片体间距的增大而减小。另外说明,相较于阻尼系数,附加质量系数对船体运动的影响更大。Due to their excellent rapidity and lateral stability,catamarans are widely used in civil and military applications.Based on the diffraction-radiation code WAMIT,the WigleyⅢcatamaran in free floating condition in head sea and bow sea under infinite water depth is investigated through the linear potential flow theory.The hydrodynamic coefficient and hull motion responses of the catamaran,especially the heave and pitch motion,are calculated with respect to the distance between the slices,and seakeeping of the catamaran is analyzed.The results show that for the catamaran with a smaller plate spacing,the additional mass coefficients are smaller and the damping coefficients are significantly increased,as well as the response amplitude of heave and pitch motions.Besides,when the additional mass coefficient is negative,the absolute size of the coefficient and the frequency range become larger as the distance between the plates decreases.At the same time,the smaller the distance between the plates,the fluid interference between the hulls makes the free surface response more intense,and the seakeeping performance of catamaran is poor.The heave motion response of the catamaran in head sea increases slightly,and the pitch motion response decreases,and they are both increased in bow sea.Moreover,when the distance between the plates is large,the heave motion response is close to zero under a certain frequency of incident wave,and the frequency decreases with the increase of the distance between the plates.In addition,compared with the damping coefficient,the additional mass coefficient has a greater influence on the motion response of the hull.

关 键 词：双体船 耐波性 势流理论 船体运动 水动力系数 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] U661.32[天文地球—海洋科学]