In recent years,with the rapid development of offshore wind power,the construction of offshore substations has gradually increased.However,the complex and ever-changing marine environment poses serious challenges to the safety and stability of these substations,highlighting the need to strengthen analysis and research on substations.To improve the efficiency of numerical modeling analysis of substations,this study focuses on offshore wind farm substations and establishes solid soil finite element models and finite element models based on spring-damping theory using ABAQUS to simulate pile-soil interaction.Modal analysis,wind-wave-flow response analysis,and seismic response analysis were then conducted.The results show that the modes obtained from modal analysis using the two models are very similar,with a frequency error of less than 5%.Additionally,when subjected to wind and wave-flow loads,the structural responses of the substations obtained from the two models exhibit significant consistency.Under seismic loads,the phase frequency of the displacement time history curves of the sample points in both models is very close to the measured data.It is noteworthy that the amplitudes calculated by the model based on spring-damping theory are closer to the measured seismic wave data.Moreover,this method greatly improves computational efficiency.
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