الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The demand on the renewable energy stimulate the research on offshore wind energy convertors (OWEC), which required special foundation due to the large loads conditions. The main challenges of (OWEC) design are the type of foundation and the dimensions. Notably, suction buckets for wind turbine differ from those of that used for anchoring floating subsea structures. The later has smaller diameter, the former is subjected to a heavy moment and lateral load and small vertical load compared with the later one. It is noteworthy that, suction buckets and monopiles are versatile substructure, where they are widely used in offshore engineering to support or anchor offshore structures including offshore wind turbines structure (OWTS). However, the design of suction buckets and monopiles can be achieved through, three methods namely; empirical approach, theoretical model, and numerical simulation model. Notably, buckets and monopiles supported wind turbines are subjected to a complex cyclic loading, resulted from self weight of the turbine and the environmental loads (wind, wave, and current). However, equivalent static loads were considered in the present study, which was devoted to investigate the behavior of suction buckets and monopiles under different monotonic loads conditions. Therefore, response of suction buckets and monopiles installed in different types of soil was discussed, and the interaction diagrams (M-H) at different values of vertical loads (V) were presented. The research was focused on the lateral and rotation stiffness of the buckets and monopiles. The effects of spatial variables on the response of the bucket and the monopile were discussed. The research work revealed that, the lateral and rotational stiffness of the bucket depend upon the load eccentricity. The displacement and, the lateral stress profiles along the bucket were obtained and discussed.