基于飞参的小幅值载荷循环对疲劳寿命计算的影响分析
发布时间：2018-07-28 17:09
【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%。
[Abstract]:This paper summarizes the method of aero-engine load spectrum cycle extraction based on flight parameters and the small cycle removal method in which the amplitude of rotational speed is less than 10% in damage calculation, and points out the advantages and disadvantages of each method. According to the actual flight parameter data, the rotational speed cycle distribution of a certain aero-engine is calculated and analyzed. Based on the linear cumulative damage theory of Miner, the effect of small cycle with amplitude less than 10% on fatigue damage of high pressure rotor parts of aeroengine is calculated, and the effect of different small cycle removal methods on fatigue damage calculation results is compared and analyzed. Based on the EGD-3 standard, the small cycle is removed according to the fatigue strength limit standard, and its rationality is verified by calculation. At the same time, the sensitivity coefficient of the speed small cycle removal in the fatigue calculation of a certain aeroengine is determined to be 0.3.
【作者单位】： 海军航空工程学院青岛校区;海军航空工程学院青岛校区研究生队;
【基金】：海军航空工程学院博士研究生创新基金(2013111014)资助~~
【分类号】：V231.95
[Abstract]:This paper summarizes the method of aero-engine load spectrum cycle extraction based on flight parameters and the small cycle removal method in which the amplitude of rotational speed is less than 10% in damage calculation, and points out the advantages and disadvantages of each method. According to the actual flight parameter data, the rotational speed cycle distribution of a certain aero-engine is calculated and analyzed. Based on the linear cumulative damage theory of Miner, the effect of small cycle with amplitude less than 10% on fatigue damage of high pressure rotor parts of aeroengine is calculated, and the effect of different small cycle removal methods on fatigue damage calculation results is compared and analyzed. Based on the EGD-3 standard, the small cycle is removed according to the fatigue strength limit standard, and its rationality is verified by calculation. At the same time, the sensitivity coefficient of the speed small cycle removal in the fatigue calculation of a certain aeroengine is determined to be 0.3.
【作者单位】： 海军航空工程学院青岛校区;海军航空工程学院青岛校区研究生队;
【基金】：海军航空工程学院博士研究生创新基金(2013111014)资助~~
【分类号】：V231.95
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