DESIGN AND ANALYSIS OF STATIONKEEPING SYSTEMS FOR FLOATING STRUCTURES
American Petroleum Institute
1 SCOPE
2 BASIC CONSIDERATIONS
2.1 Introduction to Stationkeeping Systems
2.2 Mooring Components
2.3 Permanent and Mobile Mooring Systems
2.4 Design Considerations
2.5 Foreseeable Hazards for Mooring Systems
3 ENVIRONMENTAL CRITERIA
3.1 Environmental Condition
3.2 Environmental Data
3.3 Wind
3.4 Waves
3.5 Current
3.6 Water Depth
3.7 Soil and Seafloor Conditions
3.8 Atmospheric Icing
3.9 Marine Growth
4 ENVIRONMENTAL FORCES AND VESSEL MOTIONS
4.1 Basic Considerations
4.2 Guidelines for the Evaluation of Environmental Forces and
Vessel Motions
4.3 Simplified Methods
5 MOORING STRENGTH ANALYSIS
5.1 Basic Considerations
5.2 Mooring Analysis Conditions
5.3 Vessel Offset
5.4 Line Tension
5.5 Statistics of Peak Values
5.6 Strength Analysis Based on Frequency Domain Vessel Dynamic
5.7 Strength Analysis based on Time Domain Vessel Dynamics
5.8 Strength Analysis Based on Combined Time and Frequency Domain
Vessel Dynamics
5.9 Thruster Assisted Mooring (TAM)
5.10 Transient Analysis
6 FATIGUE ANALYSIS
6.1 Basic Considerations
6.2 Fatigue Resistance of Mooring Components
6.3 Fatigue Analysis Formulation
6.4 Fatigue Analysis Procedure
7 DESIGN CRITERIA
7.1 Vessel Offset
7.2 Line Tension
7.3 Line Length
7.4 Anchoring Systems
7.5 Fatigue Life
7.6 Corrosion and Wear
7.7 Clearance
7.8 Supporting Structures
8 MOORING HARDWARE
8.1 Basic Considerations
8.2 Mooring Line Components
8.3 Winching Equipment
8.4 Monitoring Equipment
9 DYNAMIC POSITIONING
9.1 Basic Considerations
9.2 Design and Analysis
9.3 Operating Personnel
10 REFERENCES
APPENDIX A - INTRODUCTION TO MOORING COMPONENTS
APPENDIX B - RECOMMENDED WIND SPECTRUM
APPENDIX C - SIMPLIFIED METHODS FOR THE EVALUATION OF
ENVIRONMENTAL FORCES AND VESSEL MOTIONS
APPENDIX D - DRAG EMBEDMENT ANCHOR DESIGN
APPENDIX E - PILE AND PLATE ANCHOR DESIGN AND INSTALLATION
APPENDIX F - DETERMINATION OF AVAILABLE THRUST
APPENDIX G - MOORING STRENGTH RELIABILITY
APPENDIX H - MOORING DESIGN FOR VORTEX INDUCED MOTIONS (VIM)
APPENDIX CH - COMMENTARY ON APPENDIX H-MOORING DESIGN FOR
VORTEX INDUCED MOTION (VIM)
APPENDIX I - GLOBAL ANALYSIS GUIDELINES FOR DEEPWATER
FLOATING SYSTEMS
APPENDIX J - MOORING STRENGTH AND FATIGUE ANALYSIS EXAMPLES
APPENDIX K - GULF OF MEXICO MODU MOORING PRACTICE FOR
HURRICANE SEASON
Describes a rational method for analyzing, designing or evaluating station-keeping systems used for floating units.
| Document Type | Standard |
| Status | Current |
| Publisher | American Petroleum Institute |
| ProductNote | Reconfirmed 2015 |
