Reflection and Transmission of Incident Water Waves By Surface- Piercing Rigid Obstacles

• Main Authors: Lai, Ming-Song, 賴明松
• Other Authors: Ching-Yun Yueh
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/36744264069816179059

碩士 === 國立海洋大學 === 河海工程學系 === 85 === Based on linear wave theory, the reflection of incident wave on surface-piercing obstacles are studied with constant depth. By calculating the reflection and transmission coefficients, the wave blocking effect can be discussed. In the constant water depth with a circular body, based on the Composite Boundary Element Method(CBEM), the changes in wave height for the circular body were calculated with different wave incident angles.As shown in the numerical results, for all the ocean structure, the wave blocking effect would increase as the d/h increases. This shows that the wave blocking effect is effective for deep water wave(or short crest wave). In the vertical plates, for static water level exists in between plates and similar to the d/h, the exist a Zero Reflection and Complete Transmission phenomena. Comparing the rectangular blocks with vertical plates, in deep water wave area, single vertical plate would provide effective wave blocking effect. As for shallow water, eight vertical plates would provide the most effective wave blocking effect. Calculation results for different plates show that, for plates with singularity relations would similar wave blocking effect.