A study of free surface variation induced by Seabed movements

• Main Authors: YaoTsao, 曹瑤
• Other Authors: Jaw-Fang Lee
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/2ezpp5

碩士 === 國立成功大學 === 水利及海洋工程學系 === 107 === In this study, the theoretical analysis method is used to investigate the fluctuation of the water surface caused by the bed movements. Exploring a finite-length water tank, the boundary of the bed is stopped after the constant velocity upward movement from the standstill to cause the fluctuation of the water surface. Discussing the relationship between the maximum water level pattern caused by bed movement and its variable parameters to understand the influence of various parameters on the water level. Because it is similar to the piston-type wavemaking method, it is compared with that to explore the difference between the two. In the method, the problem is linearized by the small amplitude wave theory, and the space is transformed by the finite Fourier cosine transform of Lee et al (1989). And do not convert the time, thereby improving the solution method, verifying that the water level function converges, and then analyzing the analysis results. The results show that the displacement stroke is proportional to the maximum water level. When the time of displacement increases, the time of maximum water level increases, the maximum water level decreases, the water wave width increases, and the maximum water level pattern becomes wider and flatter, and it is found that the boundary displacement of the bottom produces a maximum water level with a wider water wave width and a lower wave height; and the boundary displacement of the lateral produces a maximum water level with a narrower water wave width and a higher wave height.