桨叶弹性对螺旋桨轴承力影响及计算方法研究  

Mechanism of fluid-structure interaction and algorithm for calculating the bearing force of elastic propellers

作　　者：李家盛 张振果[2,3] 田锦[5] 华宏星 LI Jiasheng;ZHANG Zhenguo;TIAN Jin;HUA Hongxing(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE),Shanghai Jiao Tong University,Shanghai 200240,China;Hubei Provincial Engineering Research Center of Data Techniques and Supporting Software for Ships(DTSSS),Wuhan 430074,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074 [2]上海交通大学机械系统与振动国家重点实验室,上海200240 [3]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240 [4]船舶数据技术与支撑软件湖北省工程研究中心,武汉430074 [5]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《振动与冲击》2020年第18期1-10,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金(51839005,51505281);华中科技大学自主创新研究基金(2019kfyXJJS005)。

摘　　要：螺旋桨水弹性问题研究对于船舶减振降噪及水弹性力学发展具有重大意义。该研究围绕螺旋桨流体激励特性开展流固耦合机理与计算方法研究。提出了一种基于时域面元计算刚体桨非均匀流中旋转所受流体力、频域面元计算弹性桨均匀流中振动所受流体力、有限元求解结构动力学的弹性桨双向流固耦合非定常水动力预报算法——时域/频域面元-有限元法,可克服频域面元-有限元法非线性伯努利方程难处理及时域面元-有限元法低效率问题。研究表明:桨弹性效应特别是流体附加阻尼在桨-轴-船系统减振降噪设计中应予以足够重视;空间不均匀来流下弹性桨轴承力计算可在平衡位置表面施加不可穿透条件。该方法和结果可为低噪声桨-轴-船系统设计提供必要的理论参考。The hydroelastic problem of propellers is of great importance for the vibration/noise reduction of ships.A two-way strongly coupled fluid-structure interaction model for elastic propellers was established.A three-dimensional panel method in time and frequency domains for fluid combined with the finite element method for structures was developed.The proposed method can solve the nonlinear Bernoulli equation to determine the driving force directly,which overcomes the disadvantages of the coupled frequency-dependent panel/finite element method.In addition,the computational cost required by the present method is considerably less than that of the coupled time-dependent panel/finite element method.It is found that the added-damping due to fluid is of crucial importance in the design of propeller-shaft-ship system.It is also observed that the non-penetration conditions may be imposed on the undeformed surface of the propellers to predict the unsteady bearing forces in spatially non-uniform inflow.

关 键 词：流固耦合/水弹性 振动 螺旋桨 有限元法 面元法/边界元法 

分 类 号：O323[理学—一般力学与力学基础]