(3.235.25.169) 您好!臺灣時間:2021/04/20 03:36
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:簡仲璟
研究生(外文):Chung-Ching Chien
論文名稱:近岸波浪頻譜形狀與其非線性研究
論文名稱(外文):A Study on the Spectral Form and the Nonlinearity of Nearshore ter Waves
指導教授:郭一羽郭一羽引用關係
指導教授(外文):Yi-Yu Kuo
學位類別:博士
校院名稱:國立交通大學
系所名稱:土木工程研究所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1994
畢業學年度:82
語文別:中文
論文頁數:95
中文關鍵詞:波浪頻譜非線性
外文關鍵詞:WavesSpectrumNonlinearity
相關次數:
  • 被引用被引用:0
  • 點閱點閱:108
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:1
以台灣近岸海域6個測站的長期波浪觀測資料, 求出個別的波譜形態, 果
發現對同一測站而言, 其波譜形態具一致性。因此基於通用型式NSWAP及
Pierson-Moskowitz波譜建立各測站的波譜模式以供海岸工程應用上的參
考。為了考察這些基於線性理論的波譜模式的適用性 , 本文以風洞水槽
在不同實驗條件下產生風浪資料, 利用波形非對稱 , 二階頻譜以及波速
頻譜等分析方法來探討波浪的非線性。由此發現一階波浪能譜形狀隨著相
對水深變小, 而趨於平緩的現, 並非單純全由波浪非線性交互作用效應所
產生的非線性能量增加所致, 而是在高頻區域線性成份波的能量也會同時
增加所造成的。另外利用台灣近岸海域鼻頭角、成功、興達等三個測站的
波浪實測資料, 以類似的非線性理論之波譜分析法的適用性, 結果發現近
岸之波浪能譜, 其非線性能量相較於線性能量甚小, 因此線性理論的波譜
仍可適用於當相對水深不小於0.1的台灣近岸海域。此外也發現不同的波
浪非線性衡量方法, 皆有其意義與功能, 因此宜相輔使用。
In this study, the local wave spectrum are obtained by six
long- term observational wave stations off the nearshore of
Taiwan, respectively. It was shown that, at a specific site,
the similarity of wave spectral form exist. Therfore,
theneralized forms of Pierson-Moskowitz spectrum and JONSWAP
spectrum were used to describe the local wave spectrum by
selecting siutable spectral form parameters. In order to
examine the feasibility of the linear theory of power spectrum,
the experimental wind wave were generated in a wind-wave flume,
with many different wind velocities and water depths. Based on
the experimental data, asymmetry of wave forms, wave bispectra,
and phase velocity spectrum were obtained. From these results,
it was found that the reason the slope of the power spectral
from becomes smaller in shallow water can be attributed th not
only the increase of nonlinear wave component energy but also
the increase of linear wave component energy on higher
frequencynge. On the other hand, wave data were obtained from
threervation stations off the nearshore of Taiwan. The fours
were applied to investigate the nonlinearity of power
spectrum. The result of this study could be utilized as
aference toward the application of the linear power spectral
model to the ocean waves when the relative water depth was
lessan 0.1 in the nearshore region of Taiwan. Furthermore,
thelarities, discrepancies and characteristics of the four
methods were discussed and compared with one another.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔