Mooring System Engineering for Offshore Structures
The mooring system is a vital component of various floating facilities in the oil, gas, and renewables industries. However, there is a lack of comprehensive technical books dedicated to the subject. This book is the first book delivering in-depth knowledge on all aspects of mooring systems, from des...
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| Main Author: | |
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| Format: | eBook Book |
| Language: | English |
| Published: |
Cambridge, Mass
Elsevier
2019
Gulf Professional Publishing Elsevier Science & Technology Elsevier Science and Technology Books, Inc |
| Edition: | 1 |
| Subjects: | |
| ISBN: | 9780128185513, 0128185511, 9780128185520, 012818552X |
| Online Access: | Get full text |
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Table of Contents:
- Title Page Preface Table of Contents 1. Introduction 2. Types of Mooring Systems 3. Environmental Loads and Vessel Motions 4. Mooring Design 5. Mooring Analysis 6. Fatigue Analysis 7. Model Tests 8. Anchor Selection 9. Hardware - Off-Vessel Components 10. Hardware - On-Vessel Equipment 11. Installation 12. Inspection and Monitoring 13. Mooring Reliability 14. Integrity Management 15. Mooring for Floating Wind Turbines Index
- 7.5 Mooring system truncation -- 7.5.1 Mooring truncation -- 7.5.2 Truncation design -- 7.5.3 Limitations due to truncation -- 7.5.4 Other truncation methods -- 7.6 Hybrid test method -- 7.6.1 Hybrid method -- 7.6.2 Basic principle -- 7.6.3 Numerical tools -- 7.7 Model test execution -- 7.7.1 Model preparation -- 7.7.2 Environment calibration -- 7.7.3 Data collection and processing -- 7.8 Questions -- References -- 8 Anchor selection -- 8.1 Overview -- 8.1.1 Available anchor types -- 8.1.2 Anchor design considerations -- 8.1.3 Soil characterization -- 8.2 Suction piles -- 8.2.1 Holding capacity of suction piles -- 8.2.2 Suction pile installation -- 8.3 Driven piles -- 8.3.1 Holding capacity of driven piles -- 8.3.2 Driven pile installation -- 8.4 Drag embedment anchors -- 8.4.1 Advantages and limitations of drag embedment anchors -- 8.4.2 Holding capacity of drag embedment anchors -- 8.4.3 Drag embedment anchor installation and recovery -- 8.5 Vertically loaded anchors -- 8.5.1 Vertically loaded anchor for permanent and temporary moorings -- 8.5.2 Holding capacity of vertically loaded anchors -- 8.5.3 Vertically loaded anchor installation -- 8.6 Suction embedded plate anchors -- 8.6.1 Advantages and limitations of suction embedded plate anchor -- 8.6.2 Suction embedded plate anchor installation -- 8.7 Gravity installed anchors -- 8.7.1 Torpedo anchor -- 8.7.2 OMNI-Max anchor -- 8.8 Questions -- References -- 9 Hardware-off-vessel components -- 9.1 Mooring line compositions -- 9.2 Chain -- 9.2.1 Studlink versus studless -- 9.2.2 Chain grades -- 9.2.3 Manufacturing process -- 9.3 Wire rope -- 9.3.1 Six-strand versus spiral strand -- 9.3.2 Corrosion protection -- 9.3.3 Termination with sockets -- 9.4 Polyester rope -- 9.4.1 First use of polyester mooring in deepwater -- 9.4.2 Rope constructions -- 9.4.3 Polyester stretch -- 9.5 Other synthetic ropes
- 12.3.4 Nondestructive examination techniques
- 3.2.1 Description of winds -- 3.2.2 Wind-induced forces -- 3.3 Wave load and vessel motions -- 3.3.1 Description of waves and swells -- 3.3.2 Wave-induced forces and motions -- 3.4 Current load and vortex-induced motion -- 3.4.1 Description of currents -- 3.4.2 Current-induced forces and vortex-induced motion -- 3.5 Ice load -- 3.5.1 Description of ices -- 3.5.2 Ice-induced forces and ice management -- 3.6 Other topics on environment loads -- 3.6.1 Directional combination of wind, waves, and current -- 3.6.2 Sensitivity study on wave period -- 3.6.3 Wave-current interaction -- 3.7 Questions -- References -- 4 Mooring design -- 4.1 Design basis -- 4.1.1 Gather input data -- 4.2 Design process -- 4.2.1 Select mooring system type -- 4.2.2 Determine the profile (catenary or taut leg) -- 4.2.3 Design the mooring pattern -- 4.2.4 Design the mooring line composition -- 4.2.5 Optimize the mooring design -- 4.3 Design considerations -- 4.3.1 Limiting vessel offset -- 4.3.2 Minimizing line tension -- 4.3.3 Reducing fatigue damage accumulation -- 4.3.4 Avoiding clash or interference -- 4.4 Design criteria -- 4.4.1 Design codes -- 4.4.2 Vessel offset requirement -- 4.4.3 Strength design criteria -- 4.4.4 Fatigue design criteria -- 4.4.5 Operability requirement -- 4.5 Engineering analysis and code check -- 4.5.1 Mooring analysis load cases -- 4.6 Questions -- References -- 5 Mooring analysis -- 5.1 Theoretical background -- 5.1.1 Governing equations of mooring line -- 5.1.2 Static solution-catenary equation -- 5.1.3 Mooring line stiffness -- 5.1.4 Mooring line dynamics -- 5.1.5 Mooring system -- 5.2 System modeling -- 5.2.1 Modeling of floaters -- 5.2.2 Modeling of mooring lines -- 5.2.3 Modeling of risers -- 5.2.4 Modeling of environments and seabed -- 5.2.5 Analysis procedure -- 5.3 Modeling of polyester rope stiffness -- 5.3.1 Upper-lower bound model
- 9.5.1 Nylon rope -- 9.5.2 High modulus polyethylene rope -- 9.5.3 Aramid rope -- 9.5.4 Considerations for moorings in ultradeep waters -- 9.6 Connectors -- 9.6.1 Connectors for permanent moorings -- 9.6.2 Connectors for temporary moorings -- 9.7 Buoy -- 9.8 Clump weight -- 9.9 Questions -- References -- 10 Hardware-on-vessel equipment -- 10.1 Tensioning systems -- 10.1.1 Fairlead and stopper -- 10.1.2 Hydraulic or electric power unit -- 10.1.3 Chain locker -- 10.2 Chain jack -- 10.3 Chain windlass -- 10.3.1 Movable windlass (or chain jack) -- 10.4 Wire winch -- 10.4.1 Drum winch -- 10.4.2 Traction winch -- 10.4.3 Linear winch -- 10.5 In-line tensioner -- 10.6 Summary -- 10.7 Questions -- References -- 11 Installation -- 11.1 Site investigation -- 11.1.1 Geophysical survey -- 11.1.2 Geotechnical survey -- 11.2 Installation of permanent mooring -- 11.2.1 Phase I-installation of pile anchors -- 11.2.2 Phase II-prelay of mooring lines on seabed -- 11.2.3 Phase III-hook-up of mooring lines to floating production unit -- 11.3 Deployment and retrieval of temporary mooring -- 11.3.1 Rig mooring system for mobile offshore drilling unit -- 11.3.2 Preset mooring system for mobile offshore drilling unit -- 11.4 Installation vessel -- 11.4.1 Anchor handling vessel -- 11.4.2 Anchor handling vessel incident-capsizing of Bourbon Dolphin -- 11.5 Questions -- References -- 12 Inspection and monitoring -- 12.1 Inspection -- 12.1.1 Regulatory requirements -- 12.2 Inspection schedule -- 12.2.1 As-built survey for permanent mooring -- 12.2.2 Periodic surveys for permanent mooring -- 12.2.3 Periodic surveys for Mobile Offshore Drilling Unit mooring -- 12.3 Inspection methods -- 12.3.1 Difference between Mobile Offshore Drilling Unit and permanent moorings -- 12.3.2 General visual inspection -- 12.3.3 Close-up visual inspection
- 5.3.2 Static-dynamic model -- 5.4 Quasistatic or dynamic analyses -- 5.5 Strength analysis in frequency domain -- 5.5.1 Response transfer functions -- 5.5.2 Frequency-domain analysis procedures -- 5.5.3 Limitation of frequency-domain analysis -- 5.6 Strength analysis in time-domain -- 5.6.1 Time-domain approach -- 5.6.2 Analysis procedure -- 5.6.3 Summary -- 5.7 Uncoupled and coupled analyses -- 5.7.1 Uncoupled analysis -- 5.7.2 Coupled analysis -- 5.7.3 Industry practice -- 5.8 Response-based analysis -- 5.9 Mooring software -- 5.9.1 OrcaFlex by Orcina Ltd. -- 5.9.2 DeepC/SESAM by DNV GL -- 5.9.3 Ariane by Bureau Veritas -- 5.9.4 Other tools -- 5.10 Questions -- References -- 6 Fatigue analysis -- 6.1 Overview -- 6.1.1 Miner's rule -- 6.2 Fatigue resistance of mooring components -- 6.2.1 T-N curves for chain, connectors and wire ropes -- 6.2.2 S-N curves for chain and wire ropes -- 6.2.3 T-N curve for polyester ropes -- 6.2.4 Comparison between T-N and S-N curves -- 6.3 Fatigue analysis in frequency domain -- 6.3.1 Simple summation approach -- 6.3.2 Combined spectrum approach -- 6.3.3 Dual narrow band approach -- 6.4 Fatigue analysis in time domain -- 6.5 Fatigue analysis procedure -- 6.6 Vortex-induced motion fatigue -- 6.6.1 Mechanism of vortex-induced motion -- 6.6.2 Vortex-induced motion fatigue assessment -- 6.7 Out-of-plane bending fatigue for chain -- 6.7.1 Mechanism of out-of-plane bending fatigue -- 6.7.2 Out-of-plane bending fatigue assessment -- 6.8 Questions -- References -- 7 Model tests -- 7.1 Types of model tests -- 7.1.1 Ocean basin model test -- 7.1.2 Wind tunnel test -- 7.1.3 Towing tank test -- 7.1.4 Ice tank test -- 7.2 Principle of model test -- 7.2.1 Scale factor -- 7.3 Capability of model basin facilities -- 7.3.1 Wind generation -- 7.3.2 Wavemaker -- 7.3.3 Current generation -- 7.4 Limitations of model test
- Front Cover -- Mooring System Engineering for Offshore Structures -- Copyright Page -- Contents -- Biographies -- Foreword -- Preface -- Acknowledgment -- 1 Introduction -- 1.1 Overview -- 1.2 History of offshore mooring -- 1.2.1 Floating drilling-rapid growth in the 1960s and 1970s -- 1.2.2 Floating production-deepwater boom in 2000s -- 1.2.3 Technologies-enabling the migration to deeper water -- 1.2.4 Industry standards-multiple codes needing harmonization -- 1.3 Floating drilling enabled by mooring -- 1.3.1 Drilling semi -- 1.3.2 Drillship -- 1.3.3 Tender-assisted drilling (TAD) -- 1.4 Floating production enabled by mooring -- 1.4.1 Tension-leg platform (TLP) -- 1.4.2 Semisubmersible (semi) -- 1.4.3 Spar -- 1.4.4 FPSO and FSO -- 1.4.5 Catenary Anchor Leg Mooring (CALM) buoy -- 1.5 Differences between drilling and production -- 1.6 Floating wind turbine -- 1.7 Questions -- References -- 2 Types of mooring systems -- 2.1 Overview -- 2.1.1 Temporary versus permanent moorings -- 2.1.2 Catenary versus taut leg moorings -- 2.1.3 Spread versus single-point moorings -- 2.2 Spread mooring system -- 2.2.1 Equally-spread versus clustered-spread moorings -- 2.3 Single-point mooring system -- 2.3.1 Internal turret mooring system -- 2.3.2 External turret mooring system -- 2.3.3 Disconnectable turret mooring system -- 2.4 Other types of single-point mooring system -- 2.4.1 Tower yoke mooring system -- 2.4.2 Catenary anchor leg mooring system -- 2.5 Dynamic positioning and thruster-assisted systems -- 2.5.1 Dynamic positioning system -- 2.5.2 Thruster-assisted mooring system -- 2.6 Questions -- References -- 3 Environmental loads and vessel motions -- 3.1 Loads on floating structures -- 3.1.1 Mooring system to resist environmental loads -- 3.1.2 Site-specific environmental data -- 3.1.3 Loads in different frequency ranges -- 3.2 Wind load