Cover image for Design of Foundations for Offshore Wind Turbines

Design of Foundations for Offshore Wind Turbines

Author Subhamoy Bhattacharya
Release Date: 2019/04/01
ISBN: 9781119128120
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Book Description

Comprehensive reference covering the design of foundations for offshore wind turbines

As the demand for “green” energy increases the offshore wind power industry is expanding at a rapid pace around the world.

Design of Foundations for Offshore Wind Turbines is a comprehensive reference which covers the design of foundations for offshore wind turbines, and includes examples and case studies. It provides an overview of a wind farm and a wind turbine structure, and examines the different types of loads on the offshore wind turbine structure. Foundation design considerations and the necessary calculations are also covered. The geotechnical site investigation and soil behavior/soil structure interaction are discussed, and the final chapter takes a case study of a wind turbine and demonstrates how to carry out step by step calculations.

Key features:

  • New, important subject to the industry.
  • Includes calculations and case studies.
  • Accompanied by a website hosting software and data files.

Design of Foundations for Offshore Wind Turbines is a must have reference for engineers within the renewable energy industry and is also a useful guide for graduate students in this area.

Table of Contents

  1. Cover
  2. Preface
  3. About the Companion Website
  4. 1 Overview of a Wind Farm and Wind Turbine Structure
    1. 1.1 Harvesting Wind Energy
    2. 1.2 Current Scenario
    3. 1.3 Components of Wind Turbine Installation
    4. 1.4 Control Actions of Wind Turbine and Other Details
    5. 1.5 Foundation Types
    6. 1.6 Foundations in the Future
    7. 1.7 On the Choice of Foundations for a Site
    8. 1.8 General Arrangement of a Wind Farm
    9. 1.9 General Consideration for Site Selection
    10. 1.10 Development of Wind Farms and the Input Required for Designing Foundations
    11. 1.11 Rochdale Envelope Approach to Foundation Design (United Kingdom Approach)
    12. 1.12 Offshore Oil and Gas Fixed Platform and Offshore Wind Turbine Structure
    13. 1.13 Chapter Summary and Learning Points
  5. 2 Loads on the Foundations
    1. 2.1 Dynamic Sensitivity of Offshore Wind Turbine Structures
    2. 2.2 Target Natural Frequency of a Wind Turbine Structure
    3. 2.3 Construction of Wind Spectrum
    4. 2.4 Construction of Wave Spectrum
    5. 2.5 Load Transfer from Superstructure to the Foundation
    6. 2.6 Estimation of Loads on a Monopile‐Supported Wind Turbine Structure
    7. 2.7 Order of Magnitude Calculations of Loads
    8. 2.8 Target Natural Frequency for Heavier and Higher‐Rated Turbines
    9. 2.9 Current Loads
    10. 2.10 Other Loads
    11. 2.11 Earthquake Loads
    12. 2.12 Chapter Summary and Learning Points
  6. 3 Considerations for Foundation Design and the Necessary Calculations
    1. 3.1 Introduction
    2. 3.2 Modes of Vibrations of Wind Turbine Structures
    3. 3.3 Effect of Resonance: A Study of an Equivalent Problem
    4. 3.4 Allowable Rotation and Deflection of a Wind Turbine Structure
    5. 3.5 Internationals Standards and Codes of Practices
    6. 3.6 Definition of Limit States
    7. 3.7 Other Design Considerations Affecting the Limit States
    8. 3.8 Grouted Connection Considerations for Monopile Type Foundations
    9. 3.9 Design Consideration for Jacket‐Supported Foundations
    10. 3.10 Design Considerations for Floating Turbines
    11. 3.11 Seismic Design
    12. 3.12 Installation, Decommission, and Robustness
    13. 3.13 Chapter Summary and Learning Points
  7. 4 Geotechnical Site Investigation and Soil Behaviour under Cyclic Loading
    1. 4.1 Introduction
    2. 4.2 Hazards that Needs Identification Through Site Investigation
    3. 4.3 Examples of Offshore Ground Profiles
    4. 4.4 Overview of Ground Investigation
    5. 4.5 Cone Penetration Test (CPT)
    6. 4.6 Minimum Site Investigation for Foundation Design
    7. 4.7 Laboratory Testing
    8. 4.8 Behaviour of Soils under Cyclic Loads and Advanced Soil Testing
    9. 4.9 Typical Soil Properties for Preliminary Design
    10. 4.10 Case Study: Extreme Wind and Wave Loading Condition in Chinese Waters
  8. 5 Soil–Structure Interaction (SSI)
    1. 5.1 Soil–Structure Interaction (SSI) for Offshore Wind Turbines
    2. 5.2 Field Observations of SSI and Lessons from Small‐Scale Laboratory Tests
    3. 5.3 Ultimate Limit State (ULS) Calculation Methods
    4. 5.4 Methods of Analysis for SLS, Natural Frequency Estimate, and FLS
    5. 5.5 Long‐Term Performance Prediction for Monopile Foundations
    6. 5.6 Estimating the Number of Cycles of Loading over the Lifetime
    7. 5.7 Methodologies for Long‐Term Rotation Estimation
    8. 5.8 Theory for Estimating Natural Frequency of the Whole System
    9. Chapter Summary and Learning Points
  9. 6 Simplified Hand Calculations
    1. 6.1 Flow Chart of a Typical Design Process
    2. 6.2 Target Frequency Estimation
    3. 6.3 Stiffness of a Monopile and Its Application
    4. 6.4 Stiffness of a Mono‐Suction Caisson
    5. 6.5 Mudline Moment Spectra for Monopile Supported Wind Turbine
    6. 6.6 Example for Monopile Design
  10. Appendix A: Natural Frequency of a Cantilever Beam with Variable Cross Section
  11. Appendix B: Euler‐Bernoulli Beam Equation
  12. Appendix C: Tower Idealisation
  13. Appendix D: Guidance on Estimating the Vertical Stiffness of Foundations
  14. Appendix E: Lateral Stiffness KL of Piles
  15. Appendix F: Lateral Stiffness KL of Suction Caissons
  16. Bibliography
  17. Index
  18. End User License Agreement
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