严文军.液压管路系统随机振动下疲劳分析[J].民用飞机设计与研 究,2020(1):1-5YAN Wenjun.[J].Civil Aircraft Design and Research,2020,(1):1-5.
液压管路系统随机振动下疲劳分析
  
DOI:10.19416/j.cnki.1674-9804.2020.01.001
中文关键词:随机振动  液压管路  功率谱密度  三区间法  振动疲劳
英文关键词:random vibration  hydraulic pipeline  power spectral density  three interval method  vibration fatigue
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作者单位
严文军 上海飞机设计研究院上海201210 
中文摘要:民用飞机液压管路系统受到飞机振动环境的影响,可能产生振动引发的管路及安装结构疲劳破坏。为了分析液压管路系统在飞机振动环境下的承受能力,参考RTCA/DO-160G中对于固定翼飞机振动环境的定义及要求,对某民用飞机液压管路进行振动模态和随机振动响应分析。通过有限元分析得出了液压管路及安装结构的随机振动Von Mises均方根应力,采用基于高斯分布和Miner线性累计损伤定律的三区间法,计算管路系统的随机振动疲劳损伤,得到了疲劳薄弱部位及疲劳分析结果,为民用飞机液压管路在随机振动环境下的疲劳分析提供参考。
英文摘要:The hydraulic pipeline system of civil aircraft is affected by the vibration environment of the aircraft, which may lead to fatigue damage of pipelines and installation structures caused by vibration. In order to analyze the bearing capacity of hydraulic pipeline system under the vibration environment, the vibration modes and random vibration responses of hydraulic pipelines for a civil aircraft are analyzed by making reference to the definition and requirements of fixed wing aircraft in RTCA/DO-160G. Von Mises stresses of hydraulic pipeline and installation structures under random vibration are obtained through finite element analysis. Based on Gaussian distribution and Miner's linear cumulative damage law, the random vibration fatigue damage of pipeline system is calculated using three interval method to get the weak location of hydraulic pipeline system under random vibration loads. The results show that the paper can provide reference to the fatigue analysis of civil aircraft hydraulic pipeline under random vibration environment.
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