直升机金属结构缺陷深度统计分析  

Statistical Analysis on Flaw Depth of Helicopter Metallic Structure

作　　者：高雅 喻溅鉴[1] 

机构地区：[1]中国直升机设计研究所,江西景德镇333001

出　　处：《直升机技术》2018年第1期55-59,64,共6页Helicopter Technique

摘　　要：缺陷对金属结构疲劳性能有不可忽视的影响。为研究直升机金属结构表面制造缺陷的尺寸分布规律,收集和统计了金属关键件和重要件上的划伤和冲击类型缺陷的尺寸,对其概率分布进行了拟合,发现缺陷深度的尺寸服从对数正态分布。对铝合金上的缺陷分划伤和冲击做进一步统计分析,给出了一定缺陷尺寸范围对应的数量比例。Flaw size and flaw type have to be defined for flaw tolerance substantiation of metal parts. To get the distribution, flaw sizes on metal parts were collected and sorted by flaw type as well as metal type. It＇ s found that the flaw depths obey lognormal distribution well. Depth of scratches and impacts on aluminium alloy were statistically analyzed. The results could be used as reference for the determination of standard flaw size.

关 键 词：金属 关键件 缺陷 尺寸 统计 

分 类 号：V215.52[航空宇航科学与技术—航空宇航推进理论与工程]