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基于FAST开源软件和Wolf土-构耦合(SSI)模型建立了风力机地震工况动力学仿真模型,并计算了5种不同平均风速的气动载荷与101种不同强度的地震载荷联合作用下风力机的动力学响应.结果表明:在额定风速下,气动载荷与地震载荷之间为非线性耦合,评估风力机地震动力学响应时,必须充分考虑风-震耦合效应;风速相同时,塔基最大弯矩先保持不变,再以线性增长的趋势变化;在低强度地震时,塔架不同高度处的最大弯矩与塔架高度之间为线性关系;随着地震强度的逐渐增大,塔架最大弯矩与塔架高度之间的关系逐渐变为非线性,且额定风速下塔架最大弯矩最大.
Based on the FAST open source software and the Wolf soil-structure coupling (SSI) model, the dynamic simulation model of the wind turbine seismic condition is established and the aerodynamic loads of five different average wind speeds and 101 kinds of earthquake loads with different intensities are calculated. The results show that there is nonlinear coupling between aerodynamic load and seismic load at rated wind speed and wind-seismic coupling effect must be fully considered when evaluating the seismic response of wind turbine. When the wind speed is the same, The bending moment keeps unchanged first and then changes linearly. When low-intensity earthquakes occur, the maximum bending moment at different height of the tower is linear with the height of the tower. With the gradual increase of earthquake intensity, The relationship between the maximum bending moment of the frame and the height of the tower gradually becomes nonlinear, and the maximum bending moment of the tower is the maximum at rated wind speed.