腐蚀条件下飞机结构疲劳寿命评定技术的试验验证

Test Examination for Assessing Aircraft Fatigue Life in Corrosion Environment

一般环境下飞机结构疲劳寿命评定技术已相对成熟,而建立在模拟试验基础上的腐蚀条件下飞机结构疲劳寿命评定技术目前尚不完善。本文通过退役飞机全尺寸结构疲劳试验结果与对应的关键部位腐蚀条件下疲劳寿命评定结果的对比分析方法,验证腐蚀条件下飞机结构疲劳寿命评定方法,同时提出了用已服役多年飞机全尺寸结构疲劳试验结果修正地面停放腐蚀修正系数曲线及加速环境谱当量加速关系的方法。

Assessing technology for aircraft fatigue life in corrosion environment is presented based on the simulated test. The results show that the existing technology is approximately feasible. A scheme to introduce all dimension fatigue examination for an out of commission airplane to modify the parking and flying corrosion curves, is put forward.