STRUCTURAL ANALYSIS OF JACKET FOUNDATIONS FOR OFFSHORE WIND TURBINES IN TRANSITIONAL WATER

Most of the offshore wind turbines (OWT) recently installed in Europe, China and North America are shallow water. However, unlocking full potential OWT lies deeper waters. Jacket substructures have presented themselves as a reliable foundation concept for transitional water depth. This study focuses on structural static dynamic analysis traditional jacket (with X K bracing) patented three-legged twisted jackets angle 30 60 degrees) deployment (beyond m). To facilitate comparison, dimensions all remain same, while, geometric configurations distinct. Static was implemented to better understand global load bearing behaviour jackets. First, displacement patterns at tower top compared. The individual reactions mud-line were investigated, followed by evaluation maximum von Mises stress. Subsequently, this research went investigate effect loading. In analysis, three main critical points considered, including wave point (67 m), platform top. A modal performed compute mode shapes natural frequencies first five modes also checked against results available OC4 project. similar analytical approach adopted design monopile or tripod foundations turbines. showed that both safe under provided combination. proved possess excellent compared four-legged jackets, while maintaining merits lower material usage with fewer nodes. Analysing stress revealed occurred transition piece close working platform. demonstrated (30 frequency 0.29 0.31 Hz fell soft-stiff category whereas classified stiff-stiff designs. discovered performance OWTs equipped various contributes preliminary selection optimal be