涡轮转子叶片低循环疲劳/蠕变寿命的预测

Low Cycle Fatigue-creep Life Prediction for Turbine Rotor Blade

根据某型涡喷发动机计算状态叶片流场计算结果,对该发动机高压涡轮转子叶片进行了热分析;并根据某典型飞行科目的三循环载荷谱,对该科目进行了载荷等效转换以及弹塑性应力分析,得到了该科目的低循环疲劳寿命和蠕变寿命;还考虑了平均应力的影响,给出了不同平均应力修正方法下该科目的总损伤。

Thermal analysis on the first stage turbine rotor blade has been completed based on the CFD results under calculated conditions. According to the three-cycles load spectrum of a typical subject, loads are transformed equivalently. And the nonlinear mechanical analysis has been completed. The blade creep damage and the low cycle fatigue damage under the subject have been obtained. Considering the effect of mean stress, the whole damage of the blade has been put out.