飞机机体结构日历寿命及腐蚀控制技术研究

【作者】 杨雷恒；

【导师】 万小朋；

【作者基本信息】 西北工业大学 ， 飞行器设计， 2004， 硕士

【摘要】 本文对使用率较低机群的使用环境谱进行分析，总结出大多数军用飞机使用环境谱仅需考虑停放环境谱，停放环境谱主要由大气湿热环境、干热环境和水溶液腐蚀介质浸泡环境(或盐雾环境等)三种介质环境所组成。对这三种环境各自采用相应的当量化办法，即可组合成便于加速试验的当量环境谱。在获得使用中结构腐蚀损伤的大量数据的基础上，通过统计拟合的方法，取得不同机场飞机外翼长桁腐蚀深度与日历寿命的统计规律的基础上，进而可以求得防护层的有效寿命、基体腐蚀扩展寿命。用机体最具代表性的易腐蚀主要承力件(如外翼长桁)，在组合式当量环境谱下做组合式模拟腐蚀试验，且通过适时地监测剥蚀损伤的表观面积大小，求得腐蚀速率，从而估算出长桁防护层的日历有效期和基体腐蚀扩展寿命，进而估算出日历总寿命、首翻期和翻修间隔期。 本文以模拟试验结果和使用中腐蚀损伤数据统计处理为主要依据，并同时满足安全性和经济性两方面的要求，在确定机体使用寿命时，以疲劳定寿结果为主、日历定寿为辅，综合给出飞机机体使用寿命。更多还原

【Abstract】 This paper analysis the low using rate are armada’s environment spectrum. For most warcraft calculate the placement spectrum is enough.. The placement spectrum is composed of moist heat atmosphere, dry heat atmosphere and water solution corrode mediator soak environment. We use equivalent method for each environment and we can compose a equivalent environment spectrum to accelerate the experiment. At the base of getting a great deal of structure corrode damage data and through statistic fitting method, discovered the rule between outboard wing corroded depth and lifespan at different airport. Then we can calculate the inoxidizing coating lifespan ,basal body corroding expansion lifespan and first repair time. We use the stressed fraction that is the most representational and sensitive to corroding to making experiment in combined type equivalent environment spectrum. We can calculate the velocity of corroding , protection period and basal body corroding expansion lifespan, first repair time and the interval of repair period.According as experiment and corroding damage data calculate the lifespan of warcraft,at the same time matching the quest of safety and economic.更多还原