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題 名 | 波浪通過兩列帷幕牆式防波堤交互作用之研究=Wave Interaction with Double Curtainwall-Pile Supported Breakwaters |
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作 者 | 岳景雲; 莊世璿; 蘇志昊; 文軍強; 陳韋翰; | 書刊名 | 海洋工程學刊 |
卷 期 | 17:4 2017.12[民106.12] |
頁 次 | 頁219-244 |
分類號 | 443.31 |
關鍵詞 | 帷幕牆式防波堤; 多領域邊界元素法; 反射率; 能量損失; Curtainwall-pile supported breakwaters; CPB; Multi-domain BEM; Reflection coefficient; Energy loss; |
語 文 | 中文(Chinese) |
中文摘要 | 本文使用多領域邊界元素法,探討波浪通過兩列帷幕牆式防波堤(CPB)的反射率、透過率及能量損失與無因次週波數kh之關係。傳統帷幕牆式防波堤是結合翼板式防波堤(CWB)與群樁式防波堤(PSB)之優點組合而成,即上半部藉由不透水翼板來反射波浪,而下半部是由群樁支撐進行消減波能。為了測試本文數值模式可行性及精度,與學者利用不同方法的數值結果作驗證與比較皆有良好的一致性。本文數值計算考慮參數有樁柱傾斜角度(γ)、前、後列相對沒水深度(d_1/h、d_2/h)、兩列帷幕牆水面間距(B/h)及樁柱透水參數(G),分別探討其水動力特性。經由一系列計算後,兩列帷幕牆防波堤最佳配置建議為:斜樁角度γ=80°、向浪側沒水深度d_1/h=0.1、背浪測沒水深度d_2/h=0.5、相對間距B/h=0.5及樁柱群透水參數G=2.0時,此時會有低反射率、低透過率及高能量損失的表現。 |
英文摘要 | In this study, the multi-domain boundary element method (MBEM) was used to investigate the hydrodynamic performances of the slightly inclined double curtainwall-pile supported breakwaters (CPB). A conventional curtainwall-pile supported breakwater (CPB), the upper part of which is a curtain wall and the lower part consists of an array of vertical piles. This is expected to give the combined benefits of both the curtainwall breakwater (CWB) and pile supported breakwaters (PSB). To examine the validity of the present model, the numerical results obtained for the limiting cases have a strongly agreement with other researchers by using different methods. The hydrodynamic performance of the double CPB can be significantly enhanced by selecting optimal design parameters such as the inclined angle, the submerged depth, the distance between two curtain walls, as well as the porous effect parameter, respectively. Then the coefficients of wave reflection, the wave transmission, the energy loss, and wave free-surface elevation are calculated and discussed. Finally, based on the numerical results, it shows that the optimal of configuration with appropriate parameters is the angle of inclined piles γ=80°, the relative submerged water depth of the front-inclined pile d_1/h=0.1 and of the rear-inclined pile d_2/h=0.5, as well as the distance between two curtain walls B/h=0.5 with the porous effect parameter on the piles G=2.0. At the same time, the reflection and transmission coefficients of the double CPB may be both below significantly, and the maximum energy loss would be occurred. |
本系統中英文摘要資訊取自各篇刊載內容。