Bragg Reflection of Water Waves by a Multiply Composite Wavy-type Breakwater (II)

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Project title

Code/計畫編號

NSC94-2611-E019-006

Translated Name/計畫中文名

波浪通過複合式浪形潛堤布拉格反射之研究(II)

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

岳景雲(計畫主持人)

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=1147611

Year

2005

Start date/計畫起

01-08-2005

Expected Completion/計畫迄

31-07-2006

Co-Investigator(s)

Deng-How Tsaur

Bugetid/研究經費

663千元

ResearchField/研究領域

土木水利工程

本文主要是利用斷面水槽，在波浪未碎波條件下進行水工模型試驗，探討規則波通過複合式浪形潛堤，在相對堤高及相對堤寬改變下其反射率之變化。所謂複合式浪形潛堤其堤頂形狀是由三組總長度相同、但不同個數之沙漣疊加再與矩形潛堤組成複合式浪形潛堤，期望利用此種設計能同時發揮潛堤與沙漣的作用。本文改變不同的相對堤寬、堤高，並與前人研究邊界元素法(BEM)數值計算之結果與水工模型試驗結果比較。總體而言，兩者反射率變化趨勢非常吻合有其一定性。 The reflection problems of normal incident waves in a constant water depth caused by a multiply composite submerged breakwater were investigated experimentally. In the case of the top of a multiply composite submerged breakwater consisting of the superimposition of three sinusoids having different wave number and same bed relative amplitudes. The experiments were conducted in the water wave facilities of the Department of Harbor and River Engineering of the National Taiwan Ocean University. Throughout the experiments, the water is kept at a constant depth of 0.5m.Five capacitance wave gauges were used for recording all necessary wave profiles Reflection coefficient is evaluated by means of Goda ’ s （ 1976 ） incident-reflection wave separation method. The reflection coefficient is obtained from experiments were found to be in reasonable agreements with numerical analysis for non-breaking waves.

Keyword(s)

水工模型
布拉格反射
複合式浪形潛堤
Hydraulic model
Bragg reflection multiply
Composite submerged breakwater

DSpace CRIS

Bragg Reflection of Water Waves by a Multiply Composite Wavy-type Breakwater (II)

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