近海风电筒型基础风机结构地震 动力响应分析

为研究近海风电筒型基础风机结构的地震动力响应，基于ABAQUS软件的UMAT平台嵌入了能够反映土体非线性与滞后性的等效线性动本构模型，考虑土—结构相互作用（soil-structure interaction， SSI），针对国内某近海风力发电系统构建“桨叶—塔架—筒型基础—土体”的有限元—无限元耦合分析模型，在静力分析的基础上采用时域分析法对其进行动力响应分析。研究表明，SSI效应会降低结构的自振频率；在地震动作用下，该风机高塔结构水平向加速度响应在塔架2/3高度附近处最大，竖向加速度响应则沿塔架高程一直增大，且其放大效应强于水平向。

Analysis on seismic dynamic response of structure for offshore wind turbine with bucket foundation

In order to research the seismic dynamic response of the structure for offshore wind turbine with bucket foundation,the soil-structure interaction(SSI) is considered with the equivalent linear dynamic constitutive model that can reflect the nonlinearity and hysteresis of soil on the basis of the subroutine UMAT provided by ABAQUS,and then a finite element and infinite element coupling model for analysis on the rotor blade,tower,bucket foundation and soil is established for a domestic offshore wind power generation system;furthermore,the dynamic response analysis is made with the time domain analysis based on a static analysis.The study shows that the natural frequency of the structure can be reduced by SSI effect.Under the seismic dynamic effect,the maximum horizontal acceleration response of the tower structure of the wind turbine occurs near 2/3 height of it,while the vertical acceleration response keeps increasing all along the tower height and its amplification effect is stronger than that of the horizontal one.