反动式汽轮机动叶片低周疲劳寿命预测研究  

Study on Low Cycle Fatigue Life Prediction of Reaction Turbine Blade

作　　者：苟小平[1] 范志飞[1] 李音[1] 谢贞军 GOU Xiaoping;FAN Zhifei;LI Yin;XIE Zhenjun(Dongfang Turbine Co.,Ltd.,Deyang Sichuan,618000)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2023年第2期22-23,48,共3页Dongfang Turbine

摘　　要：基于Neuber理论和三维弹性有限元分析,提出了一种简化的反动式汽轮机动叶片低周疲劳寿命预测方法.该方法只对反动式叶片进行弹性有限元分析,并结合材料的循环应力应变曲线和应变寿命曲线就可以快速评估叶片的低周疲劳寿命,比传统方法更为简单快捷.其评估结果对反动式动叶片的低周疲劳寿命设计具有指导意义.Based on Neuber theory and three-dimensional elastic finite element analysis,a simplified low cycle fatigue life predic-tion method for reaction turbine blades is proposed.This method only carries out the elastic finite element analysis for the reaction blade,and combines the cyclic stress-strain curve and the strain life curve of the material,it can quickly evaluate the low cycle fa-tigue life of the blade.This simplified low cycle fatigue life assessment method is simpler and faster than the traditional method.The evaluation results have guiding significance for the design of low cycle fatigue life of reaction blade.

关 键 词：低周疲劳 动叶片 Neuber 有限元 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]