分离脱落电连接器分离可靠性评估的研究

发布时间：2018-09-07 13:11

【摘要】：分离脱落电连接器广泛应用于导弹、火箭等需要分离的场合,它的分离可靠性对整个系统的正常运行至关重要,然而,目前国内外还未系统地对其进行研究,对影响其分离脱落失败的原因缺乏清晰认识,没有形成系统的可靠性评估方法。鉴于此,本文以YF6-57型分离脱落电连接器(以下简称YF6-57电连接器)为研究对象,系统分析电连接器分离失效模式、失效机理,研究电连接器分离可靠性评估方法,为提高电连接器的分离可靠性提供理论基础。本文的研究内容如下：第一章阐述了论文研究背景、目的和意义,介绍了可靠性工程发展历史与研究现状、产品失效分析技术与方法发现现状、电连接器可靠性研究的现状和存在的问题,最后提出了本文的研究目标和研究内容。第二章分析了电连接器结构、功能、材料；分析分离锁紧机构及其工作原理,并进行了受力分析,基于受力得出电连接器的失效模式、失效机理。第三章介绍了电连接器接触对结构及加工工艺；对不规则插孔簧片结构进行半刚性梁连接的等效、简化处理；对简化梁进行基于Timoshenko深梁理论的簧片受力分析,求解簧片挠曲线；最后建立接触对插拔力与簧片弯曲关系模型,获得了插拔力精确计算公式。第四章结合第三章节插拔力计算式,研究插针、插孔尺寸误差对接触对插拔力的影响；通过统计的方法,得出各个尺寸的概率分布,进而建立了考虑尺寸误差下的插拔力概率分布,并通过蒙特卡洛方法模拟插拔力,拟合得到插拔力概率分布参数；进行试验测试插拔力数据,对插拔力模拟概率分布进行检验；最终获得了接触对插拔力的概率分布。第五章通过分析分离电连接器接触对的装配关系,研究了接触对对中性；通过研究接触对、绝缘片之间配合关系,完成了接触对之间干涉分析；最终建立了电连接器分离阻力计算式；第六章分析了影响弹簧弹力的因素；通过试验,给出弹簧刚度、弹簧压缩量的概率分布模型；建立了弹簧弹射力概率分布数学表达式；最终建立分离可靠性计算模型,计算并评价分离可靠度；第七章最后对全文的研究进行总结,并提出对分离电连接器可靠性研究未来的展望。
[Abstract]:Separation and shedding electrical connectors are widely used in missile, rocket and other occasions. Its separation reliability is very important to the normal operation of the whole system. However, there is no systematic research on it at home and abroad. There is a lack of clear understanding of the causes affecting the failure of separation and shedding, and a systematic reliability evaluation method is not formed. In view of this, this paper takes YF6-57 type separating and shedding electrical connector (hereinafter referred to as YF6-57 electric connector) as the research object, systematically analyzes the separation failure mode and failure mechanism of the electrical connector, and studies the method of evaluating the separation reliability of the electrical connector. It provides a theoretical basis for improving the separation reliability of electrical connectors. The research contents of this paper are as follows: the first chapter describes the background, purpose and significance of the thesis, introduces the history and research status of reliability engineering, the current situation of product failure analysis technology and method discovery. The present situation and existing problems of reliability research of electrical connectors are discussed. Finally, the research objectives and contents of this paper are put forward. In the second chapter, the structure, function and material of the electrical connector are analyzed, and the separation locking mechanism and its working principle are analyzed. The failure mode and failure mechanism of the electrical connector are obtained based on the force. The third chapter introduces the contact pair structure and processing technology of electric connector, the equivalent and simplified treatment of semi-rigid beam connection for irregular socket Reed structure, the analysis of spring force based on Timoshenko deep beam theory, and the solution of spring deflection curve. Finally, a model of the relation between the contact force and the bending of the Reed is established, and the accurate formula for calculating the force is obtained. The fourth chapter combined with the third chapter of the formula to calculate the insertion force, the pin, the hole size error on the impact of the contact force, through the statistical method, get the probability distribution of each dimension, Then, the probability distribution of insert force considering dimension error is established, and the probability distribution parameter of insertion force is obtained by Monte Carlo method, the data of inserting force is tested and the probability distribution of interpolation force is tested. Finally, the probability distribution of contact to insert force is obtained. The fifth chapter studies the neutral contact pair by analyzing the assembly relation of the contact pair of the separated electrical connector, and completes the interference analysis of the contact pair by studying the coordination relationship between the contact pair and the insulator. In chapter 6, the factors influencing spring elasticity are analyzed, and the probability distribution model of spring stiffness and spring compression is given through experiments. The mathematical expression of the probability distribution of spring ejection force is established. Finally, the calculation model of separation reliability is established, and the separation reliability is calculated and evaluated. The prospect of the reliability research of separated electrical connectors is put forward.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB114.3;TM503.5

【参考文献】