Book contents
- Frontmatter
- Contents
- Preface
- Acknowledgments
- How to Use This Book
- 1 Overview of Ship-Shaped Offshore Installations
- 2 Front-End Engineering
- 3 Design Principles, Criteria, and Regulations
- 4 Environmental Phenomena and Application to Design
- 5 Serviceability Limit-State Design
- 6 Ultimate Limit-State Design
- 7 Fatigue Limit-State Design
- 8 Accidental Limit-State Design
- 9 Topsides, Mooring, and Export Facilities Design
- 10 Corrosion Assessment and Management
- 11 Inspection and Maintenance
- 12 Tanker Conversion and Decommissioning
- 13 Risk Assessment and Management
- Appendix 1 Terms and Definitions
- Appendix 2 Scale Definitions of Winds, Waves, and Swells
- Appendix 3 Probability of Sea States at Various Ocean Regions
- Appendix 4 Scaling Laws for Physical Model Testing
- Appendix 5 Wind-Tunnel Test Requirements
- Appendix 6 List of Selected Industry Standards
- Index
- References
4 - Environmental Phenomena and Application to Design
Published online by Cambridge University Press: 17 September 2009
Book contents
- Frontmatter
- Contents
- Preface
- Acknowledgments
- How to Use This Book
- 1 Overview of Ship-Shaped Offshore Installations
- 2 Front-End Engineering
- 3 Design Principles, Criteria, and Regulations
- 4 Environmental Phenomena and Application to Design
- 5 Serviceability Limit-State Design
- 6 Ultimate Limit-State Design
- 7 Fatigue Limit-State Design
- 8 Accidental Limit-State Design
- 9 Topsides, Mooring, and Export Facilities Design
- 10 Corrosion Assessment and Management
- 11 Inspection and Maintenance
- 12 Tanker Conversion and Decommissioning
- 13 Risk Assessment and Management
- Appendix 1 Terms and Definitions
- Appendix 2 Scale Definitions of Winds, Waves, and Swells
- Appendix 3 Probability of Sea States at Various Ocean Regions
- Appendix 4 Scaling Laws for Physical Model Testing
- Appendix 5 Wind-Tunnel Test Requirements
- Appendix 6 List of Selected Industry Standards
- Index
- References
Summary
Introduction
Actions arising from environmental phenomena on a ship-shaped offshore unit are different from those on a trading tanker. The nature of the offshore structures and their operation are such that winds, currents, and waves, among other factors, may induce significant actions and action effects on structures. Whereas waves are often the primary source of environmental actions on trading ships at sea, considerations related to specialized operations such as berthing are somewhat different. In the case of offshore structures, a good knowledge of the environmental conditions in the areas where the structures will be installed is necessary in order to design for and assure the required high-operational uptimes. Such information is also important for specialized weather-sensitive operations such as installation on site, the berthing of supply boats, and the design of mooring and station- keeping.
This chapter presents environmental phenomena and discusses selected engineering practices helpful for the determination and treatment of environmental conditions for ship-shaped offshore units, considering design, transport, installation, and operations. Primary environmental phenomena that induce significant actions and action effects on offshore structures are presented. Although winds are typically regarded as a more elementary source of actions than waves because waves are caused by winds, this chapter starts its discussion with waves first. This is perhaps appropriate only because waves are a major source of actions on the particular types of offshore structures with which we are concerned.
- Type
- Chapter
- Information
- Ship-Shaped Offshore InstallationsDesign, Building, and Operation, pp. 82 - 110Publisher: Cambridge University PressPrint publication year: 2007
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