The economics are also essential to consider when comparing different floaters or improve the original design, not just wave, current and wind-induced motions of performance. General design details of offshore structures can be found in the literature (Chakrabarti 2005). 2007): spar-buoy, tension-leg platform (TLP) and semi-submersible. Being dependent on the way of supporting the platform to obtain stability and restoring force, three mainly basic concepts were proposed which are (Butterfield et al. The concept of FOWTs was firstly proposed by Heronemus ( 1972). Meanwhile, reduction of visibility impacts if their distance far from the coast (Musial et al., 2003 Sclavounos 2008). Compared with conventional fixed-bottom offshore wind, the floating offshore wind turbines (FOWTs) can take the merits of abundant wind resources over the deeper sea, also as the capacity of being dragged out to the wind site and assembly in port (Stewart and Muskulus 2016a). Offshore wind has its enormous potential in renewable energy markets, worldwide (James and Ros 2015). In the face of rapidly growing energy demands and increasingly harsh environmental conditions, traditional energy supply will hardly meet the demand for sustainable development. It is of great use to comprehend these methodologies and challenges, which can help some future researchers to make a footstone for proposing a more efficient and functional hybrid basin experimental and numerical method. Besides, time delay in hardware-in-the-loop challenges is concluded to emphasize their significant role in real-time hybrid approaches. Several basin experiments, industrial projects and numerical codes are summarized to demonstrate the progress of hybrid experimental methods. Several key challenges in the conventional basin experiment issues are discussed, including scaling issues coupling effects between aero-hydro and structural dynamic responses blade pitch control strategies experimental facilities and calibration methods.
In this paper, a literature review of experimental-numerical methodologies and challenges for FOWTs is made. Therefore, it is of absolute necessity to find a more accurate, economic and efficient approach, which can be utilized to predict the full-scale global dynamic responses of FOWTs. Due to the dissimilar scaling issues, the conventional experimental method of FOWTs can hardly be used directly to validate the full-scale global dynamic responses accurately.