Hydroelastic dynamic characteristics of a slender axis-symmetric body

作     者：CHEN WeiMin LI Min ZHENG ZhongQin ZHANG LiWu 

作者机构：Laboratory of Environmental MechanicsInstitute of MechanicsChinese Academy of SciencesBeijing 100190China School of Aeronautics Sciences and TechnologyBeijing University of Aeronautics and AstronauticsBeijing 100191China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学、力学、天文学(英文版))

年 卷 期：2010年第53卷第7期

页      面：1339-1347页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 10772183) the Intellectual Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-YW-L07) the National High Technology Research and Development Program of China(Grant No. 2006AA09A103-4) 

主　　题：hydroelasticity added mass vibration frequency mode 

摘      要：The slender axis-symmetric submarine body moving in the vertical plane is the object of our investigation.A coupling model is developed where displacements of a solid body as a Euler beam(consisting of rigid motions and elastic deformations) and fluid pressures are employed as basic independent variables,including the interaction between hydrodynamic forces and structure dynamic *** the hydrodynamic forces,depending on and conversely influencing body motions,are taken into account as the governing *** expressions of fluid pressure are derived based on the potential *** characteristics of fluid pressure,including its components,distribution and effect on structure dynamics,are *** the coupling model is solved numerically by means of a finite element method(FEM).This avoids the complicacy,combining CFD(fluid) and FEM(structure),of direct numerical simulation,and allows the body with a non-strict ideal shape so as to be more suitable for practical *** illustrative example is given in which the hydroelastic dynamic characteristics,natural frequencies and modes of a submarine body are analyzed and compared with experimental *** agreement is observed and the model presented in this paper is shown to be valid.