Research on the Permeable Bed and Submerged Structure Effects of Wind Wave Model (Ii)

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簡歷

基本資料

Project title

Code/計畫編號

MOST105-2221-E019-057

Translated Name/計畫中文名

風浪模式透水底床與透水潛式結構效應之研究(II)

Project Coordinator/計畫主持人

Yuan-Jyh Lan

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Department/Unit

Research Center of Ocean Energy and Strategies

Website

https://www.grb.gov.tw/search/planDetail?id=11885472

Year

2016

Start date/計畫起

01-08-2016

Expected Completion/計畫迄

31-07-2017

Bugetid/研究經費

564千元

ResearchField/研究領域

土木水利工程

目前以波浪作用力平衡方程式發展之風浪數值模式，尚未考慮到波浪受透水底床與透水潛礁效應的影響。本計畫擬建立一可模擬波浪通過透水底床與透水潛式結構引致波浪減衰效應之風浪數值模式。計畫將以兩年的時間進行研究，本年度為第二年計畫，計畫將以第一年所推導具有透水底床與透水潛礁效應之波浪作用力平衡方程式模式理論以及所建置之延伸型WWM (Wind Wave Model)風浪數值模式為基礎，選擇具代表性的近岸海域進行現場實際案例模擬與比較，探討以風浪模式考慮透水底床、透水潛礁效應對波浪的影響，並依據分析結果修正數值參數，改良模式使其能適用於實際海域問題，擴展模式模擬能力。控制方程式以Hsu 等人(2005)提出之WWM 模式之波浪作用力平衡方程式為基礎，參考Rojanankmthron 等人(1990)所提出透水介質之緩坡方程式數值模式，定義透水層效應能量消散係數與源項，進一步推導出具有透水底床與透水潛礁效應之波浪作用力平衡方程式。研究過程將釐清並解決複數週波數在數值模式建置時可能面臨的問題。模式建置後並將以透水底床與透水潛堤實驗配置進行模式驗證，以及風浪模式考慮透水底床、透水潛礁效應對波浪影響的進階研究。本計畫研究成果將可提升風浪數值模式在近岸海域之模擬精度，擴展模式之應用價值。The current wind wave numerical models developed by the wave action balance equation did not include the effect of porous bed and permeable reef on wave energy dissipation. In this study, a modified wind wave numerical model is considered to be established for simulating wave decay induced by the effect of porous bed and permeable submerged structures. The project will be completed in two years and this year is the second year. Based on the extended wave action equation for porous media and a corresponding WWM (Wind Wave Model) model developed in the first year, the applicability of the modified wind wave model will be compared through practical case studies of nearshore coasts, according to the numerical parameters correction to improve numerical model. The new governing equation was used to modify the WWM model proposed by Hsu et al. (2005) according to the analysis mild-slope equation presented by Rojanankmthron et al. (1990) and definitions of energy dissipation coefficient and source term for poro-layer effect. The problem of complex wavenumber on numerical model development will be clarified and resolved. The modified model will be validated from the experimental configuration of porous bed and permeable submerged breakwater. The advanced research of wave decay by the effect of porous bed and permeable reef will also be implemented. The research will enhance the simulation accuracy of wind wave numerical model in coastal areas and extend the model application.

Keyword(s)

風浪模式
波浪作用力平衡方程式
透水底床
透水潛式結構
緩坡方程式
波高減衰
wind wave numerical model
wave action balance equation
porous bed
permeable submerged structure
mild-slope equation
wave decay

DSpace CRIS

Research on the Permeable Bed and Submerged Structure Effects of Wind Wave Model (Ii)

基本資料

Description