一种计及飞行科目的飞机结构当量损伤评估算法
An equivalent damage assessment algorithm for aircraft structure in flight subjects
刘宇麟 1毛海涛 1张柱柱1
作者信息
- 1. 中国人民解放军92728 部队, 上海 200436
- 折叠
摘要
飞机使用寿命消耗通常采用机群寿命监控方法,但飞机结构实际使用寿命受实际飞行情况影响,不同飞行科目疲劳载荷谱的明显差异性导致疲劳损伤有所不同.为此,提出了一种计及飞行科目的飞机结构当量损伤评估算法,建立了考虑飞行科目的结构当量损伤计算模型.以某机队为例,对其一年内不同飞行科目的结构当量损伤进行实例研究,发现该型飞机不同飞行科目的当量损伤差异明显,相对于低过载飞行科目,高过载飞行科目对滤波阈值敏感度更低;基于该型飞机的不同飞行科目特征,分析选取合适的滤波阈值和采样率,在保证损伤计算误差小于1％的情况下,可有效缩减数据计算量50％以上.
Abstract
Aircraft service life consumption usually adopts the method of fleet life monitoring, but the actual service life of the aircraft structure is affected by the actual flight condition.Significant variability in fatigue load spectrum across flight subjects leads to different fatigue damage.With the consideration of the flight subjects, this paper proposes an equivalent damage assessment algorithm for aircraft structures.Based on the flight parameters, an equivalent damage calculation model is built.An empirical validation of this model is conducted with the structural equivalent damage across different flight subjects in a fleet within one year, which reveals significant differences in equivalent damage across different flight subjects are evident in this aircraft type.Moreover, compared with low overload flight subjects, high overload flight subjects are less sensitive to the filtering threshold.Based on the characteristics of different flight subjects of this type of aircraft, we analyze and select the appropriate filtering threshold and sampling rate on condition that the damage calculation error is less than 1％.The amount of data calculation is reduced by over 50％.
关键词
单机寿命监控/当量损伤/飞行科目/滤波阈值Key words
individual aircraft life monitoring/equivalent damage/flight subjects/filtering threshold引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据