Numerical Analysis on Wave Transformation over Slope Sandy Bottom

• Main Authors: Ming-Ying Hsieh, 謝明穎
• Other Authors: 蔡清標
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/48686151771277978708

碩士 === 中興大學 === 土木工程學系所 === 95 === The purpose of this paper is to investigate the wave transformation over slope sandy bottom. It mainly focuses on the effect of sandy seabed, slope of seabed, soil shear modulus, soil permeability, to the wave damping on the slope sandy bottom. The governing equations in this study are derived from Tsai and Chen (2002). They set a suitable time-dependent mild-slope equation for wave propagating over a poro-elastic seabed including properties of porosity, shear modulus, permeability, of the soil. In addition, this paper also considers the nonlinear shoaling correction coefficient proposed by Tsai et al. (2001). The research compares first the wave deformation of sandy seabed and impermeable seabed. The numerical results indicate that the wave attenuation on the coarse sand seabed is more obvious than on the fine sand one. While changing the soil shear modulus, the wave damping is more obvious when the value of soil shear modulus is bigger. In addition, changing soil penetrance, its value is bigger when the wave attenuation is larger.