The Experimental Study of Wave Refraction and Diffraction

• Main Authors: Huang, Yu-Wen, 黃俞文
• Other Authors: Weng, Wen-Kai
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/q7zrne

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 106 === The purpose of this study is to understand the changes of the wave field on the coastal topography, to understand the changes in the wave field in response to the safety of the people in the sea, the economic construction of the port area and the development of marine energy, and to summarize the trends and changes. The direction of maximum energy for security or interception of the largest resources. This study mainly uses the directional spectrum analysis wave diffracting test study, using the sea area terrain near Taiping Island as an example, using three directions of spectrum calculation method: the approximate similar method (MLM) and its improved method iteration is most likely Iterated Maximum Likelihood Method (IMLM), Extended Maximum Entropy Principle Method (EMM), analysis of energy distribution and alignment changes. To explore the shallow and diffraction physics that waves produce when passing through coastal terrain. The test results can be summarized. The long-period wave refraction angle with a lower frequency of the wave field is larger, and the relative short-period wave refraction angle is smaller. On the long path of the wave, the angle of refraction will gradually increase. The diffraction wave phenomenon keeps its energy intact when the wave direction is parallel to the contour line, and diffracts along the island to the opposite side.