CAJ | 학술논문

针对风力机叶片,建立其结构动力学方程,推导分析了叶片旋转所产生的振动速度及其对来流的影响.基于BEM(Blade Element Momentum)理论,在风力机空气动力学基础上,建立了风力机的气动耦合分析模型.应用该模型,对某2MW风力机进行了计算分析,得到了叶片在额定工作风速下的振动变形、速度、加速度以及叶片沿展向的变形和载荷分布.充分考虑叶片的结构振动特性与来流风速的耦合效应,使得风力机空气动力学特性模型更加准确,对于风力机的设计和分析具有重要意义.
침대풍력궤협편,건립기결구동역학방정,추도분석료협편선전소산생적진동속도급기대래류적영향.기우BEM(Blade Element Momentum)이론,재풍력궤공기동역학기출상,건립료풍력궤적기동우합분석모형.응용해모형,대모2MW풍력궤진행료계산분석,득도료협편재액정공작풍속하적진동변형、속도、가속도이급협편연전향적변형화재하분포.충분고필협편적결구진동특성여래류풍속적우합효응,사득풍력궤공기동역학특성모형경가준학,대우풍력궤적설계화분석구유중요의의.
The structural dynamic equations of blades were constructed for blades of wind turbines. The vibration velocity of blades and the relative flow velocity were calculated using the structural dynamics model. Based on the BEM (Blade Element Momentum) theory and traditional areodynamics, the coupling model for wind turbines including the aeroelastic and aerodynamics was developed. Finally, the computation was completed for a 2MW wind turbine. The vibration deflec-tion, speed, aeceleration and load of the blades are computed at the rating wind speed. The areodynamic model of wind turbines becomes more accurate because of the coupling analysis between the vibration speed of blade and the wind speed. The results have very significance to the design of wind turbines.