Gives a short description of the topics covered in the following chapters. The principles for limit states in wind the design of offshore structures are introduced. Further, the main working principles for horizontal-axis and vertical-axis wind turbines are discussed.

Gives a short review of the linear dynamics of mechanical system, starting with a single degree of system, continuing with multibody systems, and ending with a continuous beam. Both frequency domain solutions and time domain methods are discussed.

Part one gives a description of the characteristics of the wind field over the ocean, including wind shear, turbulence and coherence. It shows how these parameters are modeled and used as an input to wind turbine analyses. The long-term statistics of the mean wind speed are discussed as well as the most common principles for wind speed measurements. In part two, the kinematics and dynamics of ocean waves are given in a form which in subsequent chapters is used in computing wave loads on structures, both in time and frequency domain. Long- and short-term wave statistics are discussed.

Describes the main components of an offshore wind turbine and discusses various substructures presently in use. For bottom-fixed turbines, the characteristics of monopiles, jackets, tripods and gravity-based substructures are discussed. Similarly, for floating wind turbines, the characteristics of semisubmersibles, tension-leg platforms, spar platforms and barges are discussed.

Introduces the concepts of hydrodynamic mass and damping, and shows how the inertia, damping and restoring matrices may be established for a six-degrees-of-freedom floating structure built from vertical columns and horizontal pontoons. Also, the computation of mass and damping matrices and wave loading general body shapes are addressed. How cancellation of wave loads may be obtained is demonstrated. The restoring effect of mooring lines is discussed, including frequency-dependent stiffness. Finally, control issues that are particular to floating wind turbines are discussed.

Discusses issues related to offshore wind farms such as layout of the wind turbines, wind turbine wakes and wake control. The wake behind wind farms is also illustrated. Further, the concept of levelized cost of energy is introduced.

Covers weather windows and duration statistics for marine operations as well as some issues related to multibody dynamics for lifting operations from a floating vessel. The impact load during mating operations is illustrated through an example and the statistics for impacts and snatch loads during mating operations are discussed. Mathieu instability is discussed in the context of a load hanging from a moving crane. The focus is on simple approaches to improve the understanding of the main features of the operations considered.

Covers the classical theory for conversion of wind energy into mechanical energy, including various methods for computing loads on aerofoils. These include momentum disc theory with and without rotation, lifting line and lifting surface approaches. Classical approaches for handling the unsteady effects are discussed and illustrated. Standard control approaches for fixed wind turbines operating below and above rated wind speed are discussed. The focus is on three-bladed horizontal-axis wind turbines.

Shows how wave loads on fixed bodies can be computed, within a linear framework as well as including viscous effects. The validity of the slender body assumption is addressed and MacCamy and Fuchs’ theory is introduced to account for diameter-to-wavelength ratios which are not very small. The concepts of modal mass and loads are introduced. Nonlinear wave loads such as ringing and slamming are discussed.