作　　者： ; ; ; ;

机构地区： 汕头大学

出　　处： 《太阳能学报》 2004年第5期592-598,共7页

摘　　要： 该文对大型风力机玻璃钢叶片疲劳寿命的工程估算方法进行了研究。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;根据有限元模态叠加法,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态应力响应;介绍了玻璃钢材料的疲劳破坏过程、破坏准则,探讨了玻璃钢材料疲劳性能及疲劳寿命估计方法;最后,运用PalmgrenMiner的线性疲劳损伤累积法则提出了一种玻璃钢叶片安全寿命估计方法。通过所设计的1 5兆瓦变速变桨距风力机叶片疲劳寿命估计的算例表明,本文提出的玻璃钢叶片疲劳寿命估计方法是可靠和实用的。 The engineering estimation method of the fatigue life of largescale wind turbine GRP blade were presented. The distribution of aerodynamic loads which affect the fatigue life of the blade were analyzed using strip theory and the dynamic stress response caused by the deterministic dynamic loads such as aerodynamic load, gravitational load and rotating centrifugal load, etc. was calculated using finite element mode superposition method. The fatigue damage process, fatigue damage rule of GRP material were introduced, the fatigue performance and fatigue life estimation method were discussed. Finally, applying the Palmgren Miner linear fatigue damage accumulation rule, a safety life estimation method was achieved. The calculation example about the fatigue life estimation of the 1.5MW variable speed pitch regulated wind turbine blade showed that the GRP blade fatigue life estimation method brought forward is and feasible reliable.

关 键 词： 风力机 玻璃钢叶片 疲劳寿命

领　　域： [动力工程及工程热物理]