不同筋腱连接角度下张力腿平台的水动力分析

发布时间：2024-01-27 15:06

　　为保证张力腿平台可持续正常工作运行,研究不同环境载荷下张力腿平台的动力响应显得尤为重要。本文重点研究当筋腱连接角度分别是90°,70°,50°和30°时,张力腿平台的动力响应特性。分别采取了三种不同的环境载荷:第一种载荷是百年一遇风浪流组合;第二种载荷仅含规则波;第三种载荷为静水海况,用于模拟张力腿平台的自由衰减运动。研究发现:平台纵摇响应最明显,在百年一遇海况中不同筋腱连接角度下平台的纵摇响应最大相差14%,0度浪向下筋腱连接角度为30度时响应最小,筋腱连接角度为90度时响应最大;在规则波中不同筋腱连接角度下平台纵摇响应最大相差9%;在22.5度和45度浪向下,当筋腱连接角度从90度到30度变化时,平台纵摇响应逐渐减小;当筋腱连接角度从90度到30度变化时,平台纵摇自由度的固有频率减小了2.55%,艏摇自由度的固有频率减小了2.4%;其他自由度的固有频率变化不明显;随着筋腱连接角度的改变,平台纵荡和艏摇响应变化很小,可以不予考虑。

【文章页数】：151 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
Chapter 1-Introduction
    1.1 Background
    1.2 Aim
    1.3 Plan
Chapter 2-Literature Review
Chapter 3-Model Configuration
    3.1 Methods
    3.2 Structural Properties of Tension Leg Platform
    3.3 Tendon arrangement
    3.4 Loading Approach Angle
    3.5 ANSYS AQWA Configuration
Chapter 4-Theory
    4.1 Wind Induced Waves
    4.2 Tethers
    4.3 Coupled Non-Linear TLP Model
Chapter 5-Model Verification Results and Discussion
    5.1 Introduction
    5.2 Response Amplitude Operators(RAOs)
        5.2.1 Surge RAO
        5.2.2 Sway RAO
        5.2.3 Heave RAO
        5.2.4 Roll RAO
        5.2.5 Pitch RAO
        5.2.6 Yaw RAO
    5.3 Radiation Damping
    5.4 Added Mass
    5.5 Diffraction and Froude-Krylov Force
        5.5.1 Surge
        5.5.2 Sway
        5.5.3 Heave
        5.5.4 Roll
        5.5.5 Pitch
        5.5.6 Yaw
Chapter 6-Tendon Connection Variation Analysis Results and Discussion
    6.1 100-yr Hurricane Condition at 0 DEG Loading
        6.1.1 Pitch Response(RY)
        6.1.2 Yaw Response(RZ)
        6.1.3 Surge Response(X)
    6.2 100-yr Hurricane Condition at 22.5 DEG Loading
        6.2.1 Pitch Response(RY)
        6.2.2 Yaw Response(RZ)
        6.2.3 Surge Response(X)
    6.3 100-yr Hurricane Condition at 45 DEG Loading
        6.3.1 Pitch Response(RY)
        6.3.2 Yaw Response(RZ)
        6.3.3 Surge Response(X)
    6.4 Loading Angle Comparison
    6.5 Regular Wave Loading
        6.5.1 0 DEG Wave Angle Pitch Responses(RY)
        6.5.2 22.5 DEG Wave Angle Pitch Responses(RY)
        6.5.3 45 DEG Wave Angle Pitch Responses(RY)
    6.6 Wave Approach Angle Comparison
    6.7 Natural Motion
        6.7.1 Pitch Response
        6.7.2 Surge Response
        6.7.3 Yaw Response
Chapter 7-Conclusion
    7.1 Model Verification Analysis
        7.1.1 RAO vs Frequency Analysis
        7.1.2 Radiation Damping vs Frequency
        7.1.3 Added Mass vs Frequency
        7.1.4 Diffraction and Froude-Krylov Force vs Frequency
    7.2 Tendon Connection Variation Analysis
    7.3 Limitations
    7.4 Further Work
References
Appendix
Statement of Publication and Scientific Research
Acknowledgements



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