采用应力场强法对某型航空发动机压气机轮盘的疲劳寿命评估及试验研究

FATIGUE LIFE PREDICTION AND EXPERIMENTAL STUDY ON A COMPRESSOR ROTARY TABLE OF A TYPE OF AIRCRAFT ENGINE BY STRESS FIELD INTENSITY METHOD

摘要: 采用应力场强法对某型航空发动机压气机轮盘疲劳寿命进行了评估,对如何确定场径的大小、应力场拟合,以及应力场强因子计算等步骤进行了详细的讨论。基于该轮盘的全尺寸件开展了疲劳寿命试验。试验结果显示,采用应力场强法进行疲劳寿命评估的结果具有较高的精度,相对于传统的名义应力法具有显著的优越性。

Abstract: The fatigue life of a compressor rotary table of a type of aircraft engine was assessed by the stress field intensity method, and some steps such as how to determine the size of field radius, stress field fitting and calculation of stress field intensity factor, were discussed in details. The fatigue life experiment based on a full size rotary table was carried out. The experiment result shown that the fatigue life prediction result given by the stress field intensity method had high accuracy, which was obviously superior to that of the conventional normal stress method.