确定飞机日历寿命用的当量环境谱研究

提出了飞机使用环境由机场湿热大气环境、水介质浸泡环境和热空气老化环境三部分所组成;根据损伤等效原则,由法拉第定律和阿伦尼斯方程,分别推导出一套不同环境之间的当量化关系式;在环境实测和试验的基础上,建立了一种适用于飞机关键部位的加速腐蚀试验环境谱,并成功地确定了某机场的当量环境谱。

EQUIVALENT ENVIRONMENT SPECTRUM RESEARCH OF DETERMINING CALENDAR LIFE FOR AIRCRAFT

Aircraft service environment consists of humid and hot atmosphere on the airport, water soaking environment and hot air ageing environment.Based on the Faraday law and Arrhenius equation, a set of universal formulas of the equivalent environment is developed. According to the corrosion damage equivalent principle, the relative expression of an equivalent accelerated relation between the accelerated corrosion environment spectrum and ground environment spectrum is determined. Based on tests and survey, an accelerated corrosion test environment spectrum used for the critical area of aircraft structures is presented. Equivalent environment spectra of accelerating corrosion test for components and simulation structures are given.