Hydroelastic analysis of water entry of deformable spheres  

作　　者：Liu Yang Tie-zhi Sun Ying-jie Wei Cong Wang Wei-xue Xia Zi-lu Wang 

机构地区：[1]School of Astronautics,Harbin Institute of Technology,Harbin,150001,China [2]School of Naval Architecture,Dalian University of Technology,Dalian,116024,China

出　　处：《Journal of Hydrodynamics》2021年第4期821-832,共12页水动力学研究与进展B辑（英文版）

基　　金：Projects supported by the National Natural Science Foundation of China(Grant Nos.11972138,11672094).

摘　　要：This paper presents a numerical study of the hydroelastic coupling during the free-surface water entry of deformable spheres of different material densities.The focus is on the hydrodynamic forces,the stress loads,the sphere deformations,the wetted areas of the sphere and the cavity dynamics,including the impacting of the elastic spheres and the hydroelastic coupled behaviors in the free surface flows.It is shown that the elastic wave propagation in the sphere scales with the sphere density.For elastic spheres immersed in the water,the variation of the sphere deformations and its energy transformation mechanism are discussed.From the contact point positions of the cavity,it can be seen that the wetted area of the sphere is closely related with the sphere deformation.The first deformation cycle is a turning point in the relation between the wetted area and the sphere density.Based on the map of m*−ηsummarized in this work,the influence of the sphere deformation on the shape of the cavity can be roughly predicted from the material properties and the impact conditions.

关 键 词：Deformable spheres material density DEFORMATION fluid-structure interaction hydrodynamic pressure stress loads 

分 类 号：O351.2[理学—流体力学]