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研究生:羅元逸
研究生(外文):MoechamadAditia
論文名稱:應用潮位資料解析海嘯波動之研究
論文名稱(外文):ON THE ANALYSIS OF TSUNAMI FROM TIDAL DATA
指導教授:高家俊高家俊引用關係
指導教授(外文):Chia-Chuen Kao
學位類別:碩士
校院名稱:國立成功大學
系所名稱:水利及海洋工程學系碩博士班
學門:工程學門
學類:河海工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:英文
論文頁數:58
外文關鍵詞:TsunamiFFTHHTEEMD
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This study discusses tsunami characteristics around Taiwan through Fast Fourier Transform (FFT) and Hilbert-Huang Transform (HHT) methods based on collecting tide data during Tohoku earthquake on March, 11-13 2011. Tsunami is one of the most destructive forces on earth and it can cause serious loss of life and property damage. Most tsunamis are generated by earthquake on the seafloor. A tsunami is a global event where its waves produce in one side of the ocean were observed in another side of the ocean. Tide data with tsunami signal obtained by observation are usually non-stationary and non-linear. Hilbert-Huang Transform (HHT) has the capability to find out the characteristic of the non-linear and non-stationary signal. HHT consists of two steps: first is to decompose the data using EEMD then calculate spectral using Hilbert Transform. Six stations are chosen to represent different parts of Taiwan. Analysis results show that similar tsunami frequencies are detected in all stations. This work shows that HHT can reveal the Tsunami arrival on energy-frequency-time plot and time period of Tsunami.
ABSTRACT I
ACKNOWLEDGEMENTS II
TABLE OF CONTENTS IV
LIST OF TABLES VI
LIST OF FIGURES VII
CHAPTER ONE INTRODUCTION 1
1.1 Research Background 1
1.2 Literature Review 3
1.3 Research Objective 5
1.4 Scope of Research 5
CHAPTER TWO CHARACTERISTIC OF TSUNAMIS 6
2.1 Causes of Tsunamis 6
2.2 Tsunami Characteristics 8
2.3 Tsunami Predicting 11
CHAPTER THREE THEORETICAL PRELIMINARIES 14
3.1 Fast Fourier Transform 14
3.2 Hilbert Huang Transform 16
3.2.1 Empirical Mode Decomposition 16
3.2.2 Ensemble Empirical Mode Decomposition 19
3.2.3 Hilbert Transform 20
CHAPTER FOUR RESEARCH RESULTS 22
4.1 Data Collection 22
4.2 Ensemble Empirical Mode Decomposition and Fourier Transform 24
4.2.1 Linshanbi Station 24
4.2.2 Taichung Port Station 27
4.2.3 Chenggong Station 29
4.2.4 Houbihu Station 32
4.2.5 Pengjiayu Station 34
4.2.6 Lanyu Station 37
4.3 Hilbert-Huang Transform 39
4.3.1 Linshanbi Station 40
4.3.2 Taichung Port Station 42
4.3.3 Chenggong Station 44
4.3.4 Houbihu Station 46
4.3.5 Pengjiayu Station 48
4.3.6 Lanyu Station 50
4.4 Discussion 51
CHAPTER FIVE CONCLUSIONS AND SUGGESTION 54
5.1 Conclusions 54
5.2 Suggestion 55
REFERENCES 56


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