民用飞机门框止动块接触偏移的可靠性分析
作者:
作者简介:

方阳,男,硕士,工程师。主要研究方向:民用飞机机身结构设计。E-mail:fangyang1@comac.cc

通讯作者:

方阳,E-mail:fangyang1@comac.cc

中图分类号:

V215.7


Reliability analysis of passenger door stop fitting by considering contact deviation for civil aircraft
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    摘要:

    民用飞机门框止动块是传递舱门载荷到机身结构的重要组件,止动块与止动钉的接触状态很大程度会影响载荷传递效率及结构可靠性。在舱门止动钉与止动块配合过程中,止动钉在接触面相对止动块会存在偏离理想设计接触状态的情况。为了评估面内接触偏移因素对止动块承载强度可靠性的影响情况,基于Isight平台集成ABAQUS软件和疲劳强度计算工具,通过量化接触偏移随机变量及其分布模型,采用蒙特卡罗法对随机变量抽样,形成一套参数化自动分析流程。经过多次循环抽样模拟计算,结合强度及疲劳计算准则分析接触面内偏移对止动块静强度、疲劳强度可靠性的影响规律。结果表明:在给定允许接触偏移量范围内,止动块的静强度、疲劳强度可靠性较高,超过3σ原则要求的99.73%,验证了止动块结构设计的合理性,该参数化自动计算流程可为机身结构的可靠性分析提供参考。

    Abstract:

    Passenger door frame stop fitting is an important component to transfer loads from passenger door to airframe. The interfacial contact state between stop fitting and door stop greatly affects the load-carrying efficiency and structural reliability. In the interfacial contact process, there exists surface contact deviations from ideal design position between stop fitting and door stop. In order to evaluate the effect of contact deviation on load carrying capacity of door frame stop fitting, an automatic parametric analysis procedure was established by integrating ABAQUS and fatigue analysis tool based on Isight platform. By quantifying stochastic variable with probability distribution model, Monte Carlo sampling method was adopted to obtain random value of different variables, forming a parameterized automatic analysis process. Through many cyclic sampling and simulation analysis, stress/fatigue life principle was used to analyze static and fatigue strength reliability of stop fitting by considering in-plane surface contact deviation. The results show that the reliability of stop fitting's static and fatigue strength is more than 99.73% provided by 3σ principle within the scope of allowable deviation tolerance, which validates the reasonable dimension design of stop fitting, and this automatic parametric procedure can provide guidance for reliability analysis of other airframe structure.

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引用本文

方阳,张文斌.民用飞机门框止动块接触偏移的可靠性分析[J].民用飞机设计与研 究,2024(1):13-20FANG Yang, ZHANG Wenbin. Reliability analysis of passenger door stop fitting by considering contact deviation for civil aircraft[J]. Civil Aircraft Design and Research,2024,(1):13-20. ( in Chinese)

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  • 在线发布日期: 2024-04-11

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