海上风机三筒基础在循环荷载作用下的响应特性研究OA

Regarding the performance of offshore wind turbine triple-bucket foundations under long-term cyclic loading,this paper establishes a finite element model for soil-triple bucket foundation interaction that incorporates a kinematic hardening constitutive model.It systematically investigates the influence patterns of different cyclic loading parameters on the dynamic response of the foundation.A comparative study of seven typical working conditions revealed that under one-way cyclic loading,the accumulation of deformation exhibits a 3rd to 4th power linear relationship with the difference between the peak and valley values of the load,and the magnitude of the power exponent is related to the load amplitude.In contrast,under two-way cyclic loading,both the overall settlement and differential settlement of the foundation increase significantly.Particularly when the absolute values of the load peaks and valleys are equal,the cumulative settlement amount increases by 394%compared to the one-way loading condition.Furthermore,the research elucidates the degradation of the foundation's overall stiffness resulting from the cyclic softening effect of the soil under the multi-bucket bearing mechanism.These findings provide theoretical support for the optimal design of such foundations under cyclic loading.