基于热点应力的发电机转子线圈焊接疲劳评估  

Welding Fatigue Assessment of Generator Rotor Coils Based on the Hot Spot Stress

作　　者：杨昔科 张燕 何明艳 罗帆 YANG Xike;ZHANG Yan;HE Mingyan;LUO Fan(Shanghai Electric Power Generation Equipment Co.,Ltd.Generator Plant)

机构地区：[1]上海电气电站设备有限公司发电机厂,200240

出　　处：《电机技术》2020年第6期1-6,共6页Electrical Machinery Technology

摘　　要：采用热点应力法,对发电机转子线圈焊接结构进行有限元计算,获取热点应力-位移曲线。通过疲劳试验,获取位移-寿命曲线,从而得到转子线圈焊接结构的热点应力-寿命曲线。将有限元热点应力计算方法和热点应力-寿命曲线两者相结合,使对转子线圈焊接结构的疲劳强度评估成为可能。The hot spot stress method is used to perform the finite element calculation on the welding structure of the generator rotor coil to obtain the hot spot stress-displacement curve.Through the fatigue test,the displacement-life curve is achieved,thereby,getting the hot spot stress-life curve of the rotor coil welding structure.Combining the finite element calculation method for hot spot stress and hot spot stress-life curve,it becomes possible to carry out the fatigue strength assessment of the rotor coil welding structure.

关 键 词：热点应力 发电机 转子线圈 疲劳 有限元 

分 类 号：TM305[电气工程—电机]