A Simplified Model of Interlocked Caisson System for Damage Assessment
- Alternative Title
- 인터록킹된 케이슨 시스템의 손상평가를 위한 단순화 모델
- Abstract
- The objective of this study is to present a simplified model of interlocked caisson system which can be used for dynamic analysis and damage assessment. The following approaches are performed to obtain the objective. Firstly, a conceptual dynamic model of the interlocked caisson system is designed on the basis of the characteristics of existing harbor caisson structures. A mass-spring-dashpot model considering only the sway motion is proposed. In the simplified model, each caisson unit is connected to adjacent ones by adding springs and dashpots to represent the condition of interlocking mechanisms. Secondly, the simplified model of the interlocked caisson system is evaluated for vibration analysis. A 3-D finite element model of the caisson system is utilized to examine the accuracy of the simplified model’s vibration responses. Thirdly, the simplified model of the caisson system is employed for damage assessment. A damage detection method based on modal strain energy is formulated to localize damage in the caisson system.
- Issued Date
- 2013
- Awarded Date
- 2013. 8
- Type
- Dissertation
- Publisher
- 부경대학교
- Alternative Author(s)
- 휴인탄칸
- Affiliation
- 대학원
- Department
- 대학원 해양공학과
- Advisor
- Prof. Jeong-Tae Kim
- Table Of Contents
- TABLE OF CONTENTS
TABLE OF CONTENTS i
LIST OF FIGURES iii
LIST OF TABLES iv
ABSTRACT v
CHAPTER 1 INTRODUCTION 1
1.1 Background 1
1.2 Objective and Scope 3
1.3 Organization of the Thesis 4
CHAPTER 2 A SIMPLIFIED MODEL OF INTERLOCKED CAISSONS 5
2.1 Introduction 5
2.2 Equations of Motion 5
2.3 Determination of Structural Parameters 8
CHAPTER 3 VALIDATION OF SIMPLIFIED MODEL FOR VIBRATION ANALYSIS 12
3.1 Introduction 12
3.2 Target Caisson Structure 12
3.3 3-D FE Analysis of Target Caisson Structure 15
3.3.1 3-D FE Model 15
3.3.2 Forced Vibration Analysis 17
3.3.3 Vibration Modal Analysis 18
3.4 Simplified Model of 3-D FE Simulation 21
3.5 Validation of Simplified Model’s Vibration Responses 23
3.5.1 Vibration Response in Time Domain 23
3.5.2 Vibration Response in Frequency Domain 29
CHAPTER 4 FEASIBILITY OF SIMPLIFIED MODEL FOR DAMAGE ASSESSMENT 33
4.1 Introduction 33
4.2 Modal Strain Energy-based Damage Detection 33
4.3 Verification of MSE-based Damage Detection 36
4.3.1 Description of Simulated Damage 36
4.3.2 Damage Detection Results 36
CHAPTER 5 CONCLUSIONS 39
REFERENCES 41
ACKNOWLEDGEMENTS 46
- Degree
- Master
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