CAJ | 학술논문

为准确模拟柔性叶片在紊流风速下的气弹响应，研究叶片振动对气动载荷与气弹响应的反馈，构建包含多体系统动力学模型与气动模型的柔性叶片非线性气动弹性力学模型。在将细长柔性叶片离散为多刚体系统基础上，运用计算多体系统动力学理论和 Roberson-Wittenburg 的建模方法，结合叶素动量理论，采用 Kaimal 模型模拟脉动风速，建立风力机柔性叶片的气弹耦合方程。算例以美国可再生能源实验室（NREL）研制的5 MW 近海风力机为研究对象，分析叶片的振动和叶根的挥舞与摆振力矩，研究柔性叶片振动对气动载荷影响。结果表明，叶片达到一定长度后，模拟风力机气弹响应问题时，其振动影响不可忽略。
위준학모의유성협편재문류풍속하적기탄향응，연구협편진동대기동재하여기탄향응적반궤，구건포함다체계통동역학모형여기동모형적유성협편비선성기동탄성역학모형。재장세장유성협편리산위다강체계통기출상，운용계산다체계통동역학이론화 Roberson-Wittenburg 적건모방법，결합협소동량이론，채용 Kaimal 모형모의맥동풍속，건립풍력궤유성협편적기탄우합방정。산례이미국가재생능원실험실（NREL）연제적5 MW 근해풍력궤위연구대상，분석협편적진동화협근적휘무여파진력구，연구유성협편진동대기동재하영향。결과표명，협편체도일정장도후，모의풍력궤기탄향응문제시，기진동영향불가홀략。
In order to exactly model the aeroelastic response of a blade under turbulent flow and study blade vibration's feedback on aerodynamic load and aeroelastic response,here a nonlinear aeroelastic mechanical model containing flexible blade multibody system's dynamic model and an aerodynamic model was constructed.Through discreting a flexible slender blade into a multi-rigid-body system,the aeroelastic coupled equations of the blade were obtained by using the theory of computational dynamics of multibody system and Roberson-Wittenburg modeling method. In the coupled equations,the blade element-momentum theory (BEM)was used to calculate the aeroelastic load of the wind turbine blade and Kaimal model was used to calculate random wind speed.The time domain response of a 5 -MW offshore wind turbine blade of the US.Renewable Energy Laboratory was calculated.The response included the vibration of the blade and the flapwise and edgewise bending moments at the blade root.The effect of the vibration of the flexible blade on the aerodynamic load was also studied.The results revealed that the effect of slender blade vibration can not be ignored when simulating the aeroelastic response of a wind turbine.