Abstract Nonlinear time-domain simulations are often used to predict the structural response at design stage ensure acceptable operation and/or survival of floating structures under extreme conditions. An environmental contour (EC) is commonly employed identify critical sea states that serve as input for numerical assess safety and performance marine structures. In many studies, marginal condit...

Abstract. This paper describes the development of a new reference controller framework for fixed and floating offshore wind turbines that greatly facilitates tuning represents standard industry practices. The turbine controllers are most commonly cited in literature have been developed to work with specific turbines. Although these provided control functionalities, they often not easy modify us...

Abstract The utilisation of offshore wind turbines has rapidly increased in the last decade, which resulted a steady increase turbine sizes. global average size from 1.5 MW to 6 two decades. research community started investigate huge 10 15 recent years, resulting study very innovative floating using various substructure technologies. With this backdrop, paper will and thoroughly compare power ...

many procedures suggest for reduction of responses of riser to vortex induced vibrations (viv). natural frequencies of marine risers is an important parameter that can affect the responses of riser to viv. change of riser properties such as top tension and bending stiffness can alter natural frequencies. in this study effects of riser specifications on the responses and fatigue damage of marine...

For the design of safe and economic offshore structures and ships the knowledge of the extreme wave environment and related wave/structure interactions is required. A stochastic analysis of these phenomena is insufficient as local characteristics in the wave pattern are of great importance for deriving appropriate design criteria. This paper describes techniques to synthesize deterministic task...