Based on the development background of the onshore wind power industry with large megawatt wind turbines,a new type of Lassen sheet pile bucket foundation for onshore wind turbines is proposed.Taking the 3.3 MW wind turbine of a wind farm as the research object,a series of static and dynamic characteristics of the new infrastructure were analyzed by the large-scale numerical simulation analysis software ABAQUS.The results show that:the new type of foundation structure has a good ability to bear external static load,and the force and deformation of the structure can meet the requirements of practical engineering.The natural vibration frequency of the overall structure of wind turbines not only meets the requirements of the wind turbine manufacturer,but also safely avoids the excitation frequency generated during operation.Under the extreme random wind load with a 50-year return period,the overall displacement of the foundation and the dynamic response of the connection part of the pile cap and bucket skirt are within a reasonable range.The new type of Lassen sheet pile bucket foundation can be put into operation safely and stably.
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