作　　者： ; ; ; ;

机构地区： 汕头大学

出　　处： 《工程力学》 2004年第6期118-123,共6页

摘　　要： 研究了大型风力机玻璃钢叶片载荷谱和疲劳寿命的工程估算方法。运用片条理论分析了影响风力机叶片疲劳寿命的气动载荷分布;应用多体动力学方法,分析了旋转叶片动力刚化效应产生的原因及其对叶片振动模态的影响;根据模态叠加法,计算了叶片在气动力、重力和旋转惯性力等确定性载荷作用下的动应力响应;探讨了玻璃钢叶片的疲劳性能、破坏准则及疲劳寿命估计方法;提出了一种基于 Palmgren Miner 线性累积损伤法则的玻璃钢叶片安全寿命估计方法。通过所设计的 1.5MW 变速变桨距风力机叶片疲劳寿命估计的算例表明,该方法是可靠和实用的。 This paper presents the load spectrum and an engineering estimating method of the fatigue life of GRP blade of large-scale wind turbine. The distribution of aerodynamic loads which affect the fatigue life of the blade are analyzed using strip theory. The stiffening effects of the rotating blade are discussed, using the multi-body dynamics method. The influence of the dynamic stiffening effect on the blade vibration mode is then analyzed. The dynamic stress response caused by the deterministic dynamic loads such as aerodynamic load, gravitational load and rotating centrifugal load, etc., is calculated using finite element mode superposition method. The fatigue damage performance, fatigue damage rule and fatigue life estimate method of GRP blade are discussed. Based on the Palmgren Miner linear fatigue damage accumulation rule, a safety life estimate method is developed. The fatigue life estimate of the 1.5MW variable speed pitch regulated wind turbine blade shows that the GRP blade fatigue life estimate method is reliable and feasible.

关 键 词： 风能利用 风力机 玻璃钢叶片 疲劳寿命 动力刚化

领　　域： [动力工程及工程热物理]