不对称双体船非线性横摇阻尼及横摇运动分析  

Analysis of Nonlinear Rolling Damping and Rolling Motion of Asymmetric Catamaran

作　　者：张艺瀚[1] 王平[1] 胡景丰 ZHANG Yihan;WANG Ping;HU Jingfeng(Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011

出　　处：《华南理工大学学报（自然科学版）》2021年第7期26-33,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：上海市领军人才基金资助项目(K90103)。

摘　　要：针对不对称双体船,应用计算流体动力学(CFD)方法,通过重叠网格技术构建了一种横摇阻尼数值预报方法,模拟了不同横向间距和纵向间距下不同初始横摇角及不同航速时的横摇衰减运动,并分析了横摇阻尼特性。基于三维势流理论,并考虑非线性横摇阻尼和非线性恢复力矩的修正,得到了该船型在规则波中的横摇运动响应,分析了不同浪向下的横摇运动特性。最后,开展模型试验验证了所提出的横摇阻尼和横摇运动数值预报方法的有效性。结果表明,模型试验结果和数值仿真结果较为接近,侧体上的横向波浪扰动相比于主体会造成更大的横摇响应。A numerical prediction method of rolling damping was established for asymmetric catamaran with computational fluid dynamics(CFD)method and overset grid technology.Firstly,the study simulated the rolling decay curves with different rolling angles and ship speed under different transverse and longitudinal space,and analyzed the rolling damping characteristics.Then based on 3D potential flow theory and considering the correction of the nonlinear rolling damping and nonlinear restoring,the rolling motion response of asymmetric catamaran in regular waves was calculated,and the characteristics of rolling motion under different wave directions were analyzed.Finally,model tests were carried out to verify the numerical prediction methods of rolling damping and rolling motion.It is showed that the model test results are close to the numerical prediction,and the transverse wave disturbance in the side body leads to greater rolling response than that in the main body of the asymmetric catamaran.

关 键 词：不对称双体船 非线性横摇 计算流体动力学 三维势流理论 

分 类 号：U663.4[交通运输工程—船舶及航道工程]