A Simulation on Directional Ocean Wave Fields

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Project title

Code/計畫編號

NSC89-2611-E019-029

Translated Name/計畫中文名

海面上方向波場的模擬

Project Coordinator/計畫主持人

Jaw-Guei Lin

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

尹彰

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=492908

Year

2000

Start date/計畫起

01-08-1999

Expected Completion/計畫迄

01-07-2000

Bugetid/研究經費

504千元

ResearchField/研究領域

土木水利工程

本計畫研究成果可分為兩大部分。一是將波高計陣列中的各測點，給定理論的交譜 (cross spectrum)計算，將計算出來的散佈函數(spreading function)與目標值比對，發現最大熵值法(maximum entropy method)計算的結果與理論值最接近。但是該方法是由單一測點的方法演變而來，易受雜訊的干擾，因此，計算實驗波場的方向頻譜(directional spectrum)最合適的方法應為最大概度估計法 (maximum likelihood method)。另外，實驗水槽中的最佳量測範圍，距離造波板 10~14 公尺。所搭配的波能反射板最佳長度為 4 公尺。 Two conclusions were obtained in this study. Firstly, the optimal wave observation range in the directional wave basin of the Laboratory of Ocean Engineering of the Department of Harbor and River Engineering, National Taiwan Ocean University was tested to be 10~14m, and the reflection panel length is 4m. Secondly, for the star array for directional wave measurement, maximum entropy method fits theoretically well with target directional spreading function. Due to the noise interruption, however, maximum likelihood method is much better than others when analyzing the experimental data.

Keyword(s)

能量擴散
方向波譜
多組件蛇形方向造波機
Energy diffusion
Directional spectrum
Multi-element wave generator

DSpace CRIS

A Simulation on Directional Ocean Wave Fields

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