표제지
ABSTRACT
Nomenclature
목차
제1장 서론 15
1.1. 연구배경 15
1.2. 연구동향 19
1.3. 연구목적 26
제2장 해저 구조물의 모델링 28
2.1. 모델 정의 28
2.2. 모델 제원 및 연구조건 30
제3장 연구 방법 34
3.1. 모형실험 34
3.1.1. 실험모형 모델 34
3.1.2. 유동가시화 38
3.1.3. 모형실험 조건 43
3.1.4. 속도 계측 46
3.2. 수치해석 기법 52
3.2.1. 해석 기법 52
3.2.2. 해석모델링 및 계산조건 52
3.2.3. 수치해석 검증 54
제4장 배열 변화에 따른 영향 55
4.1. 모형실험 유동특성 55
4.1.1. 와류 특성 55
4.1.2. 실린더 간격 및 지면높이 변화의 지면 유동경계층 영향 56
4.2. 수치해석 유동특성 66
4.2.1. 지면 높이 변화의 영향 66
4.2.2. 실린더 간격 변화의 영향 68
제5장 제반 유동특성 77
5.1. 와도 특성 77
5.1.1. 지면 높이에 따른 와도 79
5.1.2. 실린더 간격에 따른 와도 80
5.2. 난류강도 85
5.2.1. 지면 높이 변화 특성 88
5.2.2. 실린더 간격 변화 특성 89
제6장 유체력 분석 94
제7장 결론 98
참고문헌 100
부록 105
Table. 2.1.1. Analysis conditions 31
Table. 2.1.2. Law of Similarity for Study Model 32
Table. 3.1.1. Experimental environment 35
Table. 3.2.1. Physical models of simulation 53
Table. 3.2.2. Conditions of domain & grid 53
Table. 3.2.3. Validation of Drag coefficient data 54
Fig. 1.1.1. World & Korea coast's Submarine Cable map 18
Fig. 1.1.2. Concept of Submarine Cable & Pipeline, Installation appearance 18
Fig. 1.1.3. Cause Analysis of damage by Fishing & Anchor 18
Fig. 1.2.1. Installation of Submarine Cable 25
Fig. 1.2.2. Repair of Submarine Cable 25
Fig. 1.2.3. Research case of Submarine Cable 25
Fig. 2.1.1. Appearance and cross section of Submarine cable 29
Fig. 2.1.2. Diagram of Analysis Model 33
Fig. 2.1.3. Domain of flow field 33
Fig. 3.1.1. Schematic arrangement of PIV system 36
Fig. 3.1.2. Test-device of the Cylindrical structures 37
Fig. 3.1.3. Shape of Test-model 37
Fig. 3.1.4. VD-IIIB DPSS LASER 40
Fig. 3.1.5. FAST CAM-X & Host Computer 40
Fig. 3.1.6. Instantaneous image of Particle at h/ d=0.375, Vm_4 41
Fig. 3.1.7. Instantaneous image of Particle at h/ d=1.125, Vm_4 42
Fig. 3.1.8. Configuration of circulating water channel 45
Fig. 3.1.9. Test section on circulating water channel 45
Fig. 3.1.10. Principle of velocity determination in PIV technique 50
Fig. 3.1.11. Gray level cross-correlation method 50
Fig. 3.1.12. The vector processing used in PIV algorithm 51
Fig. 3.2.1. Grid system 53
Fig. 3.2.2. Boundary condition 53
Fig. 4.1.1. Streamlines of h/ d=0.000, Vm_4 by Experiment 58
Fig. 4.1.2. Streamlines of h/ d=0.375, Vm_4 by Experiment 59
Fig. 4.1.3. Streamlines of h/ d=0.750, Vm_4 by Experiment 60
Fig. 4.1.4. Streamlines of h/ d=1.125, Vm_4 by Experiment 61
Fig. 4.1.5. U_velocity field of h/ d=0.000, Vm_4 by Experiment 62
Fig. 4.1.6. U_velocity field of h/ d=0.375, Vm_4 by Experiment 63
Fig. 4.1.7. U_velocity field of h/ d=0.750, Vm_4 by Experiment 64
Fig. 4.1.8. U_velocity field of h/ d=1.125, Vm_4 by Experiment 65
Fig. 4.2.1. Streamlines of h/ d=0.000, Vm_4 by CFD 69
Fig. 4.2.2. Streamlines of h/ d=0.375, Vm_4 by CFD 70
Fig. 4.2.3. Streamlines of h/ d=0.750, Vm_4 by CFD 71
Fig. 4.2.4. Streamlines of h/ d=1.125, Vm_4 by CFD 72
Fig. 4.2.5. U_velocity field of h/ d=0.000, Vm_4 by CFD 73
Fig. 4.2.6. U_velocity field of h/ d=0.375, Vm_4 by CFD 74
Fig. 4.2.7. U_velocity field of h/ d=0.750, Vm_4 by CFD 75
Fig. 4.2.8. U_velocity field of h/ d=1.125, Vm_4 by CFD 76
Fig. 5.1. Rotational & Irrotational region 78
Fig. 5.1.1. Vorticity field of h/ d=0.000, Vm_4 by Experiment 81
Fig. 5.1.2. Vorticity field of h/ d=0.375, Vm_4 by Experiment 82
Fig. 5.1.3. Vorticity field of h/ d=0.750, Vm_4 by Experiment 83
Fig. 5.1.4. Vorticity field of h/ d=1.125, Vm_4 by Experiment 84
Fig. 5.2. Velocity deviation at the Flow field 87
Fig. 5.2.1. Ti field of h/ d=0.000, Vm_4 by Experiment 90
Fig. 5.2.2. Ti field of h/ d=0.375, Vm_4 by Experiment 91
Fig. 5.2.3. Ti field of h/ d=0.750, Vm_4 by Experiment 92
Fig. 5.2.4. Ti field of h/ d=1.125, Vm_4 by Experiment 93
Fig. 6.1. Data of Fluid force at Vm_4 97
A-1-1. Major Technology Standard of Seabed Structure 105
A-2-1. Streamlines of h/ d=0.000, Vm_2 by Experiment 106
A-2-2. Streamlines of h/ d=0.375, Vm_2 by Experiment 107
A-2-3. Streamlines of h/ d=0.750, Vm_2 by Experiment 108
A-2-4. Streamlines of h/ d=1.125, Vm_2 by Experiment 109
A-2-5. U_velocity field of h/ d=0.000, Vm_2 by Experiment 110
A-2-6. U_velocity field of h/ d=0.375, Vm_2 by Experiment 111
A-2-7. U_velocity field of h/ d=0.750, Vm_2 by Experiment 112
A-2-8. U_velocity field of h/ d=1.125, Vm_2 by Experiment 113
A-3-1. Streamlines of h/ d=0.000, Vm_2 by CFD 114
A-3-2. Streamlines of h/ d=0.375, Vm_2 by CFD 115
A-3-3. Streamlines of h/ d=0.750, Vm_2 by CFD 116
A-3-4. Streamlines of h/ d=1.125, Vm_2 by CFD 117
A-3-5. U_velocity field of h/ d=0.000, Vm_2 by CFD 118
A-3-6. U_velocity field of h/ d=0.375, Vm_2 by CFD 119
A-3-7. U_velocity field of h/ d=0.750, Vm_2 by CFD 120
A-3-8. U_velocity field of h/ d=1.125, Vm_2 by CFD 121
A-4-1. Vorticity field of h/ d=0.000, Vm_2 by Experiment 122
A-4-2. Vorticity field of h/ d=0.375, Vm_2 by Experiment 123
A-4-3. Vorticity field of h/ d=0.750, Vm_2 by Experiment 124
A-4-4. Vorticity field of h/ d=1.125, Vm_2 by Experiment 125
A-5-1. Ti field of h/ d=0.000, Vm_2 by Experiment 126
A-5-2. Ti field of h/ d=0.375, Vm_2 by Experiment 127
A-5-3. Ti field of h/ d=0.750, Vm_2 by Experiment 128
A-5-4. Ti field of h/ d=1.125, Vm_2 by Experiment 129
A-6-1. Data of Fluid force at Vm_1 131
A-6-2. Data of Fluid force at Vm_2 133
A-6-3. Data of Fluid force at Vm_3 135