한국해양대학교

Detailed Information

Metadata Downloads

천부 퇴적구조 분석을 위한 chirp 반응 신호의 속성분석

DC Field Value Language
dc.contributor.author 임채현 -
dc.date.accessioned 2019-12-16T02:42:49Z -
dc.date.available 2019-12-16T02:42:49Z -
dc.date.issued 2017 -
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/11404 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002331434 -
dc.description.abstract A subbottom layer is composed of different types of sediments or the exposed rock, etc. It represents the different physical properties, depending on facies. Its physical properties and geological characteristic may be useful in the interpretation of geophysical data. Chirp SBP has been widely used to study a subbottom layer classification based on acoustic characteristics analysis. Generally, Chirp SBP provide the seismic data of the envelope type without polarity and phase information. Therefore, Envelope signal is limited to expressing subbottom sediments that represent the various physical properties because it ignores polarity and phase information. In this study, we analyzed attribute results of chirp signal response for a shallow subbottom sedimentary structure. We generated a FM pulse according to the frequency bandwidth, the sampling interval, the window function and composed numerical model using P-wave velocity, density, attenuation coefficient, thickness of transitional layer and roughness standard deviation. We conducted Chirp SBP modeling and derived a chirp raw data. We conducted attributes analysis using a chirp signal response obtained after a matched filter process on the acquired chirp raw data. We confirmed the envelope signal of the corresponding layer and lower layer don’t appear for the coarse sediment, subbottom gas, transitional layer. But, when various attribute methods such as instantaneous frequency and bandwidth were applied to the chirp signal response, the corresponding layer and lower layer could be confirmed. In the field survey, it is considered that the subbottom sediment structure should be analyzed by comparing the results of applying attribute methods such as the instantaneous frequency and bandwidth to the chirp signal response in the area where the corresponding layer and lower layer of envelope signal don’t appear. -
dc.description.tableofcontents 1. 서 론 1 1.1 개요 1 2. Chirp SBP 수치모델링 4 2.1 Chirp SBP의 음원 6 2.1.1 주파수 변조 펄스 6 2.1.2 윈도우 함수의 종류 및 특성 8 2.2 해수 및 해저 퇴적층에 따른 임펄스 반응 14 2.2.1 음향 전파 함수 14 2.2.2 음향 감쇠 15 2.2.3 불연속면 층 17 2.2.4 마찰 손실 19 2.3 정합필터 과정 20 3. 지질학적 모델에 따른 수치모형실험 25 3.1 탄성파 속성분석 25 3.1.1 엔벨로프 25 3.1.2 순간 위상 27 3.1.3 순간 주파수 27 3.1.4 순간 대역폭 28 3.2 실험방법 29 3.3 실험결과 30 3.3.1 얇은 층 30 3.3.2 표층이 조립질 퇴적물로 구성된 수치모델 36 3.3.3 퇴적층 내 천부가스 층이 포함된 수치모델 41 3.3.4 퇴적층 내 불연속면 층이 포함된 수치모델 46 4. Chirp SBP 현장자료의 속성분석에 따른 천부 퇴적구조 분석 53 4.1 Chirp SBP 현장자료 취득 및 처리 53 4.2 속성분석 적용 결과 56 5. 결론 61 감사의 글 64 References 66 Bibliography 74 -
dc.format.extent 74 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 천부 퇴적구조 분석을 위한 chirp 반응 신호의 속성분석 -
dc.type Dissertation -
dc.date.awarded 2017-02 -
dc.contributor.department 대학원 해양에너지자원공학과 -
dc.description.degree Master -
dc.subject.keyword Chirp SBP -
dc.type.local Text -
dc.identifier.holdings 000000001979▲000000006780▲000002331434▲ -
Appears in Collections:
해양에너지자원공학과 > Thesis
Files in This Item:
천부 퇴적구조 분석을 위한 chirp 반응 신호의 속성분석.pdf Download

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse