基于复合材料薄壁结构的转子叶片非线性气弹时域响应分析

阐述了基于复合材料薄壁梁结构的风力机转子叶片非线性气弹响应分析方法。结构是基于不同刚度系数的挥舞和扭转组成的弯-扭耦合模型,而非线性气动力的计算采用非线性ONERA模型。在Galerkin法基础上,利用片条理论分解了非线性气动力的积分项,构建了结构和气动力相结合的非线性微分方程组,给出了分析非线性气弹响应的方法,并基于小范围近似法进行了线性化,研究了线性化后的时域响应,给出了基于线性化后的时域响应进行稳定性分析的方法。

NONLINEAR AEROELASTIC RESPONSE ANALYSIS OF ROTOR BLADE MODELED AS COMPOSITE THIN-WALLED STRUCTURE

Nonlinear aeroelastic response analysis method based on rotor blade of wind turbine of anisotropic composite thin-walled closed-section was introduced.The structure is a bending-twist coupling model established on different stiffness coefficients.The computation of nonlinear aerodynamics takes nonlinear ONERA model.On the basis of Galerkin method,the paper decomposes the integration of nonlinear aerodynamics by means of a strip theory,constructs nonlinear differential equations combining structure and aerodynamics,and gives the method to analyze nonlinear aeroelastic response.The paper linearizes the equations with small-scale approximate method,studies linearized aeroelastic response,and gives the approaches to analyze aeroelastic stability.