一种加装稳定翼的海上风电负压桶型基础研究

针对海上风电负压桶型基础,以提高桶基水平承载性能和降低结构动力响应为目的,提出了一种加装稳定翼的负压桶型基础型式。通过在桶身设置一组稳定翼,使得桶周土抗力得以充分利用。以单立柱负压桶基为例,建立桶土全实体有限元模型,进行了静力分析和包括模态分析、瞬态分析、谱分析在内的动力分析。结果表明:稳定翼的设置增强了桶基水平承载性能;水平位移和动力响应显著减小;结构低阶固有频率略有提高。

Study on a new type of suction bucket foundation with wings for offshore wind turbine

Suction bucket foundation for offshore wind turbine is investigated.A new type of suction bucket foundation with steel-wings,named the wing-bucket foundation,is studied to improve its horizontal bearing capacity and dynamic response character.A group of wings are set outside the suction bucket;and the shallow earth reaction in front of the bucket is taken into full play.The finite element model of bucket and soil using solid element is founded.Static analysis and dynamical analysis including mode analysis,transient analysis and spectrum analysis are carried out by a typical example of a single-suction bucket foundation.It is revealed that the horizontal bearing capacity of suction bucket foundation is enhanced with the setting of wings,that the horizontal deflection and dynamic response are reduced,and that the lower-order natural frequencies are increased appreciably.