大型风力发电机组机舱座极限强度计算方法与应用  

Ultimate Strength Calculation Method of Large Wind Turbine Support Frame and Its Application

作　　者：沈凤亚 陈伟梁 唐超利 余国城 

机构地区：[1]浙江运达风电股份有限公司,浙江杭州310012 [2]风力发电系统国家重点实验室,浙江杭州310012

出　　处：《水电能源科学》2012年第9期184-187,共4页Water Resources and Power

基　　金：国家科技支撑计划基金资助项目(2012BAA01B01)

摘　　要：针对大型风力发电机组机舱座的热点应力分布和应力值的随机变化问题,利用有限元理论和线性叠加理论,分析了大型风力发电机组机舱座在其设计寿命周期内所承受的极限应力,结合载荷遍历法逐一求解机舱座的热点处应力值,从中选出最大应力值作为机舱座的设计参考值,并与一般的极限载荷法进行比较。结果表明,采用载荷遍历法所得的应力值较一般的极限载荷工况法更接近热点的实际值,更准确地反映了热点处的应力值,为结构设计的可靠性和优化提供了理论依据。For the random variation of thermal stress distribution and stress value of large wind turbine support frame, FEM and linear superposition theory is used to analyze the ultimate stress suffered in its design life cycle. The stress of thermal point is progressively solved with load traversing method. The maximal value is selected to be regarded as the design reference value and it is compared with that of ultimate load method. The results show that the stress with load traversing method is much closer to the actual value, which can more exactly reflect the stress of thermal point. Thus, it provides theoretical foundation for the stability and optimization of structural design.

关 键 词：风力发电机组 机舱座 热点 载荷遍历法 极限载荷法 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]