Wave Interaction with a Submerged Elastic Plate

• Main Authors: Huang, Chen-Ching, 黃政勤
• Other Authors: Yung-Chao Wu
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/43875641454438955665

碩士 === 國立交通大學 === 土木工程學系 === 84 === Based on a two dimensional potential flow theory,the boundary element method(BEM) is developed and applied tostudy the interaction of linear water wave with a submerged elastic plate. The computational domainis divied into two regions, i.e., a water region and a elastic plate region.The elastic plate is considered as a fleble beam and its defomation is inpure bending. In this thesis, Boundary element method and Finite elementmethod(FEM) are developed and combined to study this interaction problem.The water region is modelling by BEM with linear element, and the flexiblebeam is modelling by one- dimension FEM.Numerical result show that the reflection and transmission coefficients dependon the characteristics of the elastic plate (such as its material, thick, and length)and the location of the elastic plate.The optimum conditions of the submerged plate to archieve minimumtransmission of the waves, can be deduced from the numerical results.Optimun plate length was found to be 0.5-0.7 of the wavelength above the rigid plate. A dramatic results, complete reflection, appeared when wave length almost equalto the nature frequence of the elastic plate.