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題 名 | 花蓮港池振盪現象的探討=A Study of Harbour Resonance in Hwa-Lien Harbour |
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作 者 | 郭一羽; 林明儀; 曾相茂; | 書刊名 | 海洋工程學刊 |
卷 期 | 2:1 2002.07[民91.07] |
頁 次 | 頁55-71 |
分類號 | 443.2 |
關鍵詞 | 觀測; 頻譜; 振盪; Field data; Spectrum; Resonance; |
語 文 | 中文(Chinese) |
中文摘要 | 為瞭解花蓮港港池的水面振盪現象,進行分析實測得到的颱風風浪數據,以探討其發生的機制。利用港內港外同時監測獲得的颱風波浪資料進行頻譜分析,分析五個颱風全部歷時的資料,發現發生港內振盪的機制相當類似。從實測數據的分析,無法很明確的指出港內振盪週期,但從分析的過程與結果來判斷,港內發生振盪的物理機制大致上與線性的波浪理論計算結果吻合。對應著振盪頻率,港內振盪是由港外波浪低頻域能量所引起。但港外風浪愈大,港內振盪不一定愈大,必須視港外波浪低頻成份波之波向而定,而港外之低頻成份波的波向也不一定與風浪的主方向相同。 |
英文摘要 | In this paper, we use the field data of five typhoon wind waves occurred near Haw-Lien harbour to study the mechanism of harbour resonance. Through investigating the wave spectrum, we found that all of the typhoon wind waves have the similar resonance mechanism. The resonance frequency can not be found out clearly, but the resonance mechanism of field data almost in agreement with the linear wave theory. The harbour resonance was induced by the energy of corresponding low frequency component of wind waves. The direction of low frequency component is an important factor to decide whether the resonance occur or not. The wave directions of low frequency components are not always same as the dominant waves. That is the reason why sometimes resonance does not occur in harbour in spite of having strong wind waves outside. |
本系統中英文摘要資訊取自各篇刊載內容。