海上风机单桩基础局部冲刷计算分析

Calculation and Analysis of Local Scour of Monopile Foundation of Offshore Wind Turbines

依据波、流联合作用下的韩海骞公式计算江苏某海上风电场桩基局部冲刷深度,再采用SACS软件对结构进行分析结果表明,局部冲刷增加桩身侧向位移,降低整机频率,疲劳损伤大。解决这些问题可通过加大桩径和桩长,要设计出既经济又安全的基础尺寸,还需结合实际工程的冲刷观测结果进行更准确的预测。

The local scour depth of the wind turbines in an offshore wind farm in Jiangsu Province is calculated using the Han Haiqian formula under the combined action of wave and current.Then,the pile structure is analyzed using SACS software.The results show that local scour may increase the lateral displacement of the pile,reduce the frequency of the whole unit,and aggravate the fatigue damage.These problems can be solved by increasing the pile diameter and pile length.However,it is necessary to make more accurate local scour prediction based on actual observation results to get economic and safe foundation dimensions.