한국해양대학교

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광섬유 브래그격자를 이용한 해양플랜트 부유식구조물의 안전진단 연구

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dc.contributor.author 정근후 -
dc.date.accessioned 2017-02-22T05:51:15Z -
dc.date.available 2017-02-22T05:51:15Z -
dc.date.issued 2011 -
dc.date.submitted 56959-08-26 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174632 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/8694 -
dc.description.abstract Offshore plant structures must be secured of structural safety applying real-time monitoring technology about structure respond because they are in a state of very poor ocean conditions. Especially, real-time monitoring system development using Fiber Optical Sensor (FOS) that supplements strain gauge's weakness is expected to strengthen technology and infrastructure of domestic high-tech sensor field. In this study, Fiber Bragg Grating (FBG), sensors were attached to the scaled model of offshore floating structure, and put in scaled model in the water tank, and then calculated strain after measuring scaled model's wavelength through optical spectrum analyzer. Also Finite element model using ABAQUS was modeled and finite element analysis was conducted to analyze strains. The results of experiment was compared with those of finite element analysis. This study was trying to evaluate the suitability of real-time monitoring of offshore floating structures using FOS. The conclusion can be summarized as follows : 1. This study performed strain measurement of the scaled model using FBG sensor through optical spectrum analyzer. It could confirm behaviors of upper plate of the scaled model because wavelength spectrum according to load application can print out results instantly. 2. In this study, a floating structure using ABAQUS was modeled and finite element analysis was conducted. Through structural analysis results, compression was acted at load application area as the center. And tension was acted from 1/4 part of finite element model to the outermost part. The negative bending moment was presented because both ends of upper plate of scaled model were fixed end support by welding. 3. As the results of the experiment, strains of No.1 and No.6, No.2 and No.5, No.3 and No.4, No.7 and No.10, No.8 and No.9 of scaled model had symmetry with load application area as the center. The error range was very small numerical value within the limits of ±2&micro -
dc.description.abstract ε. -
dc.description.abstract ε were very large numerical value. The error range was measured within ±5&micro -
dc.description.abstract ε. 4. Though comparing experiment results with finite element analysis results, the results of experiment were remarkably consistent with the results of finite element analysis. Although errors(%) in strains of long direction's ends and parts within 10&micro -
dc.description.tableofcontents 1. 서론 1 1.1 연구배경 및 목적 1 1.2 연구동향 3 1.3 연구범위 및 방법 4 2. 광섬유 센서의 활용 6 2.1 광섬유 센서의 기본이론 6 2.1.1 광섬유의 구조 6 2.1.2 광섬유 센서의 종류 8 2.2 FBG센서의 기본원리 9 2.2.1 FBG 센서의 측정원리 9 2.2.2 FBG 센서의 시스템 구성 11 2.3 FBG센서의 적용사례 12 2.3.1 국외 적용 사례 12 2.3.2 국내 적용 사례 14 3. 해양플랜트 부유식구조물의 정적 재하 실험 16 3.1 개요 16 3.2 축소모델 정적 재하 실험 17 3.2.1 축소모델 개요 17 3.2.2 실험 장비 19 3.2.3 실험 방법 22 3.3 FBG센서를 이용한 변형률 측정 24 3.4 실험 결과 분석 33 4. 해양플랜트 부유식구조물의 구조해석 37 4.1 개요 37 4.2 해양플랜트 부유식구조물의 모델링 38 4.3 해양플랜트 부유식구조물의 적용 하중 산정 39 4.3.1 정적하중 40 4.3.2 부력 41 4.4 해석 결과 분석 43 5. 실험결과와 해석결과 비교 49 5.1 변형률 측정결과 비교 49 5.2 결과 분석 55 6. 결론 57 참고문헌 59 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 광섬유 브래그격자를 이용한 해양플랜트 부유식구조물의 안전진단 연구 -
dc.title.alternative A Study on Safety Diagnosis of Offshore Plant Floating Structure using Optical Fiber Bragg Grating -
dc.type Thesis -
dc.date.awarded 2011-02 -
dc.contributor.alternativeName Keun-Hoo Jung -
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해양건축공학과 > Thesis
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