大型水平轴风力机塔筒焊缝强度分析  

ANALYSIS OF WELD STRENGTH IN TURBINE TOWER OF HAWT

作　　者：龙凯[1,2] 毛晓娥[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]工程车辆轻量化与可靠性技术湖南省高校重点实验室(长沙理工大学),长沙410114

出　　处：《太阳能学报》2014年第10期1981-1987,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(11202078);北京市自然科学基金(3143025);工程车辆轻量化与可靠性技术湖南省高校重点实验室(长沙理工大学)开放基金(2013kfjj01);中央高校基本科研业务费专项资金(2014ZD16)

摘　　要：为实现某大型水平轴风力机塔筒截面焊缝强度设计,介绍了DIN18800-4应力计算的工程算法,针对2.0 MW直驱型风力机塔筒某一截面进行极限强度校核。根据疲劳载荷分类,提出等效疲劳损伤和时序疲劳损伤两种不同计算方法。推导了等效疲劳载荷、等效疲劳应力与等效疲劳损伤的计算公式。针对某一截面对等效疲劳损伤和时序疲劳损伤进行分析计算和结果对比,给出两者等价性条件与适用条件。结果表明,被校核的截面焊缝满足强度设计要求。提出的方法在大型水平轴风力机塔筒截面焊缝极限强度与疲劳强度分析上具有可行性和有效性。In order to realize the resistance to ultimate and fatigue strength design for tower section weld of the large-scale horizontal axis wind turbine, the engineering algorithm of DIN18800-4 stress calculation was introduced. The ultimate strength for one section of a 2 MW direct-drive wind turbine was checked. According to the classification of the fatigue load, two different methods for the calculation of the equivalent fatigue damage and time series fatigue damage were presented. The formula for equivalent fatigue load, equivalent fatigue stress and equivalent fatigue damage were derived. The results of the equivalent fatigue damage and time series fatigue damage for one section were compared. The equivalence conditions and applicable conditions for two different methods were presented. The results show that the tower section weld satisfies the requirement of the strength design. The method is feasible and effective in the analysis of ultimate strength and fatigue strength for tower section weld of the large- scale horizontal axis wind turbine.

关 键 词：风力机塔筒 焊缝 疲劳 等效疲劳载荷 时序疲劳载荷 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]