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针对大型风力机,在当作柔性和刚性风力机时,可以通过气动和结构耦合动力学用来研究两者尾迹和载荷的区别。在设计和校核阶段,需要考虑风力机结构载荷影响的动态特性和气动性能变化。采用非定常自由涡尾迹方法计算尾迹形状和气动载荷。在考虑气动载荷、惯性载荷和重力载荷影响下,分析了叶片挥舞和摆振动态响应。采用模态法建立起风力机解耦动力学方程,并且进行数值求解该方程。结果表明:风力机考虑柔性变形后,对尾迹形状、动态响应和气动性能产生一定影响。这种柔性和刚体风力机的差异表明气动结构耦合效应对风力机的设计和性能计算具有重要意义。
For large wind turbines, when used as flexible and rigid wind turbines, the difference between the wake and the load can be studied by the aerodynamic and structural coupling dynamics. In the design and verification stage, the dynamic characteristics and the aerodynamic performance changes of the wind turbine structure load need to be considered. The unsteady free vortex wake method is used to calculate the wake shape and the aerodynamic load. Under the influence of aerodynamic load, inertial load and gravity load, the dynamic response of blade waving and shimmy is analyzed. Using the modal method to establish the wind turbine decoupling dynamics equations, and numerical solution of the equation. The results show that the wind turbine has some influence on wake shape, dynamic response and aerodynamic performance after considering flexible deformation. The difference between this flexible and rigid body wind turbine shows that the aerodynamic structural coupling effect is of great importance to the design and performance calculation of the wind turbine.