汽轮机叶片的静动应力分析及高低周疲劳寿命估算

Analysis on Static & Dynamic Stress andFatigue Life Estimation of Turbine Blades

提出了汽轮机叶片静应力和动应力的三维有限元计算模型，并导出具体的有限元方程。得出了叶片材料的疲劳特性曲线和循环应力应变关系曲线。提出叶片高低周疲劳寿命计算模型。最后用该模型对一个实际叶片进行了动静应力分析和寿命估算，计算结果和实际符合较好。

In this paper a 3D finite element model on static and dynamic stress calculation of turbine blades is presented,and the finite element equation is describedThe fatigue behavior and cycle stressstrain behavior of blades material is givenThe high and low cycle fatigue life estimation model is also developedFinally an actual blade is analyzed and the numerical results are in agreement with the experiment data