Mechanism of fluid-structure interaction and algorithm for calculating the bearing force of elastic propellers
LI Jiasheng1,2,3,4，ZHANG Zhenguo2,3，TIAN Jin5，HUA Hongxing2,3
1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2.State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China;
3.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai Jiao Tong University, Shanghai 200240, China;
4.Hubei Provincial Engineering Research Center of Data Techniques and Supporting Software for Ships (DTSSS), Wuhan 430074，China;
5.AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200241, China
Abstract：The study on hydroelastic problems of propellers is of great importance for the vibration/noise reduction of ships. Two-way strongly coupled fluid-structure interaction model for elastic propellers is established. A three-dimensional panel method in time and frequency domains for fluid combined with the finite element method for the structures is developed. The proposed method can solve the full nonlinear Bernoulli formula 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 considerable smaller than that of the coupled time-dependent panel/finite element method. It is found that the added-damping due to the fluid are 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 the spatially non-uniform inflow.
李家盛1,2,3,4，张振果2,3，田锦5，华宏星2,3. 桨叶弹性对螺旋桨轴承力影响及计算方法研究[J]. 振动与冲击, 2020, 39(18): 1-10.
LI Jiasheng1,2,3,4，ZHANG Zhenguo2,3，TIAN Jin5，HUA Hongxing2,3. Mechanism of fluid-structure interaction and algorithm for calculating the bearing force of elastic propellers. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(18): 1-10.
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