航空电连接器接触可靠性研究

发布时间：2018-02-15 06:28

本文关键词： 航空电连接器可靠性微动有限元机械性能电气性能　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：航空电连接器的作用是连接各种航空电子设备,每个完整的航空系统都离不开航空电连接器。自从问世以来,电连接器种类、功能都在不断发展,电连接器在各领域得到广泛应用的同时,其接触可靠性也得到了广泛研究。首先,本文阐述了航天电连接器电接触可靠性的重要意义,对电接触可靠性做了简单概述。介绍了微动现象,随后简介了接触电阻理论以及微动磨损理论,并对它们的影响因素进行分析。对影响接触电阻的重要因素如接触件结构形式、接触压力、温度、材料等做出解释。介绍了微动磨损的详细过程并阐述了影响微动磨损的重要因素。其次,针对典型开槽式航空电连接器接触件进行了机械性能研究,基于ANSYS有限元分析软件对接触件进行静力和插拔力的分析,优化接触件结构参数,以提高航空电连接器机械性能,提高电接触可靠性。再次,对电连接器的接触件进行热电-结构耦合场分析,研究电连接器的电气性能。得到了接触件接触状态下接触电阻和温升的大小。通过仿真可以了解电连接器的温升,为实际的生产设计提供指导。优化电连接器接触件的结构参数,确定了影响接触电阻和电连接器工作温升的影响因素。最后,基于自主研发的微动实验平台,对典型航空电连接器进行微动实验,研究电连接器在不同微动振幅和不同微动频率下接触电阻的变化情况,得到微动振幅和频率对接触电阻的影响机制。利用高倍显微镜观察微动后电连接器表面磨损情况,得出微动振幅和频率对电连接器微动磨损的影响机制。
[Abstract]:The role of avionics connectors is to connect all kinds of avionics, and every complete aeronautical system is inseparable from avionics connectors. Since its inception, the types and functions of electrical connectors have been developing. While electrical connectors are widely used in various fields, their contact reliability has also been extensively studied. Firstly, the importance of electrical contact reliability of aerospace electrical connectors is expounded. The fretting phenomenon is introduced, the contact resistance theory and fretting wear theory are introduced, and their influencing factors are analyzed. The detailed process of fretting wear is introduced and the important factors affecting fretting wear are described. Secondly, the mechanical properties of contact parts of typical slotted aero-electric connectors are studied. Based on the ANSYS finite element analysis software, the static force and the insertion force of the contact are analyzed, and the structural parameters of the contact are optimized in order to improve the mechanical performance of the aeronautical electrical connector and improve the reliability of the electrical contact. The thermoelectric-structural coupling field of the contact part of the electrical connector is analyzed to study the electrical performance of the electrical connector. The contact resistance and temperature rise in the contact state are obtained. The temperature rise of the electrical connector can be understood by simulation. To provide guidance for actual production design, optimize the structural parameters of contact parts of electrical connectors, determine the influence factors of contact resistance and working temperature rise of electrical connectors. Finally, based on the fretting experiment platform developed by ourselves, The fretting experiments of typical avionics connectors are carried out to study the contact resistance of electrical connectors under different fretting amplitudes and different fretting frequencies. The influence mechanism of fretting amplitude and frequency on contact resistance was obtained, and the surface wear of electric connector after fretting was observed by high power microscope, and the influence mechanism of fretting amplitude and frequency on fretting wear of electric connector was obtained.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V242

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