Local Scour Depth Prediction of Offshore Wind Power Monopile Foundation Based on GMDH Method

In recent years, Chinese offshore wind farms have experienced varying degrees of foundation scour since their completion. The maximum depth pile foundations has far exceeded the design depth, which seriously threatens safety turbines. Among current prediction formulas, values calculated by specification 65-1, 65-2 formula are small and results on dangerous side. value American Hec-18 is safe but conservative. other specifications a large deviation from actual situation. Based available test data, main factors influencing local foundations, gauge analysis method, group method data handling (GMDH), this paper proposes for monopile under action wave–current. addition, flume experiments were conducted. Combining experimental monitoring Rudong farm in Jiangsu, equation code equation, DNV HEC-18 Rudolph Raaijmakers compared analyzed. show that relative error, mean variance, normalized variance between predicted measured paper’s smaller than those formulas. high calculation accuracy practical application value.