基于飞参的小幅值载荷循环对疲劳寿命计算的影响分析  

INFLUENCE ANALYSIS OF SMALL AMPLITUDE LOAD CYCLE TO FATIGUE LIFE CALCULATION BASED ON FLIGHT PARAMETERS

作　　者：徐可君[1] 王永旗[2] 夏毅锐[1] 秦海勤[1] 

机构地区：[1]海军航空工程学院青岛校区,青岛266041 [2]海军航空工程学院青岛校区研究生队,青岛266041

出　　处：《机械强度》2016年第3期618-625,共8页Journal of Mechanical Strength

基　　金：海军航空工程学院博士研究生创新基金(2013111014)资助~~

摘　　要：对基于飞参的航空发动机载荷谱循环提取方法和损伤计算时转速幅值低于10%的小循环去除方法进行总结,指出各自优缺点;根据实际飞参数据计算分析某型航空发动机使用过程中的转速循环分布规律,基于Miner线性累积损伤理论计算幅值低于10%的转速小循环对航空发动机高压转子部件疲劳损伤的影响,比较分析不同小循环的去除方法对疲劳损伤计算结果影响,指出各自优缺点;基于EGD-3标准,提出按疲劳强度极限标准去除小循环,并经计算验证其合理性,同时确定某型航空发动机疲劳计算时转速小循环去除的敏感系数为0.3%。The article summed up the extraction method of load spectrum cycles based on flight parameters of aeroengine and summed up the removal methods of small cycles which speed amplitude were lower than 10%,then pointed the advantages and disadvantages of each method. Analyzed the speed cycles distribution of a certain type of aeroengine,calculated the influence of small speed cycles which amplitude is lower than 10% of high pressure rotor speed by Miner＇s linear cumulative damage theory,compared the influence of different removal methods to damage calculation results and pointed the advantages and disadvantages of each method; Based on EGD-3 standards,put forward the extraction method of removing small cycles and verify its rationality by calculation,then define the sensitivity factor of removing small speed cycles in fatigue calculation as 0. 3% for a certain type of aeroengine.

关 键 词：航空发动机 飞参 载荷谱 小循环 疲劳寿命 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程] TH165[机械工程—机械制造及自动化]