关键词: 潮流能, 基础, 复杂荷载, 设计方法

Abstract: The marine environment is complex and changeable, and the foundation of tidal current turbine is subjected to complex loads such as currents and waves. However, the current standards related to the utilization of tidal energy are still in their infancy, which makes it difficult to guide the design of foundation of tidal current turbine in the complex marine environment. Based on the Zhejiang Zhoushan megawatt-scale grid-connected tidal energy generation project, and combining with the relevant specifications and standards, the load combination form under each operating condition with complex marine load is proposed. As well, based on the geological condition of the project site, the design scheme for foundation of the tidal energy unit is proposed, namely box-format composite foundation and gravity-format composite foundation. The strength and deformation of the box-format composite foundation under extreme operating conditions and seismic conditions have been compared and analyzed, and the review of foundation bearing capacity and structural anti-collapse and anti-slip capability has been conducted. The results show that the design solution can meet the safe operation of tidal energy units, which is of reference value to the development and utilization of tidal energy in Zhejiang Zhoushan tidal energy demonstration project and other similar projects.

Key words: tidal current energy, foundation, complex loads, design method