多孔隙岸壁對港灣波動之影響

The Influence of the Porous Quaywall on Wave Characters in a Harbor

蕭松山(Sung-Shan Hsiao) ； 方惠民(Hui-Ming Fang)

《海洋工程學刊》 6卷1期 (2006/04) Pp. 61-84

https://doi.org/10.6266/JCOE.2006.0601.04

摘要

本文旨在探討多孔隙消能式岸壁對港內水面波動的影響。研究之進行，首先藉由水理實驗方法，探討不同設置條件下多孔隙岸壁結構對波浪的反射特性；隨之，將水理試驗結果導入由雙互換邊界元素法技巧所建構的港池水面波動數值模式中，以處理岸壁邊界部分反射問題，改善以往以一定值反射率來描述消能式岸壁邊界的不合理性。研究結果發現，在相同的孔隙率條件下，孔隙結構特徵寬度(w/h)越大，其消能效果也越佳。

關鍵字

多孔隙消能式岸壁 ； 雙互換邊界元素法

並列摘要

The purpose of this study is to discuss the influence of the porous quaywall on wave behaviors in a harbor. A series experiments were conducted with the variation of porosity and width of quaywall. Introduce these results into a DRBEM (dual reciprocity boundary element method) model of harbor tranquility to discuss the influence of real wave absorption characteristics of solid boundaries on the harbor tranquility simulation results. With all of these, the general numerical model of harbor tranquility can be modified to approach the real situation and to be more applicable in harbor. The result shows that wave reflection coefficient decreases with increasing the width of quaywall for a fixed porosity of quaywall.

並列關鍵字

porous quaywall ； DRBEM ； harbor tranquility