三轴随机振动下电连接器的松动机理及应力-电阻映射关系研究

刘少杰1,仇原鹰1,白金1,杜建功1,李静1,王海东2,王肇喜2,张磊3

振动与冲击 ›› 2021, Vol. 40 ›› Issue (11) : 190-195.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (11) : 190-195.
论文

三轴随机振动下电连接器的松动机理及应力-电阻映射关系研究

  • 刘少杰1,仇原鹰1,白金1,杜建功1,李静1,王海东2,王肇喜2,张磊3
作者信息 +

Loosening mechanism and stress-resistance mapping relationship of electrical connector under triaxial random vibration

  • LIU Shaojie1, QIU Yuanying1, BAI Jin1, DU Jiangong1, LI Jing1, WANG Haidong2, WANG Zhaoxi2, ZHANG Lei3
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摘要

在多轴复杂振动环境下,电连接器结构可能发生松动,影响其电器的电接触性能,导致设备功能失效。为探究多轴随机振动环境下电连接器松动过程中的力学特性,建立了导弹电子舱段上电连接器模型,在随机振动环境下模拟了插针相对插孔松动退出过程中接触压力的变化历程,揭示了电连接器松动过程中的应力演变机理;通过对比三轴与单轴随机振动环境下应力变化的趋势,并根据3个区间差异比较了三轴振动相对于单轴振动的电连接器松动特征,提供了一种连接器松动的三轴振动应力筛选方法;运用R.Holm接触电阻与接触压力关系式,导出了电连接器应力与电阻的映射关系,将对插针与插孔间的接触应力监测转化为对接触电阻的监测,解决了针孔内部动应力难以测量的技术难题。

Abstract

Under multi-axis complex vibration environment, an electrical connector structure may be loose to affect electrical contact performance of its electrical appliances and cause failure of equipment function.Here, in order to explore mechanical characteristics of electrical connector in loosening process under multi-axis random vibration environment, a model of electrical connector in missile electronic cabin was established.The change time history of contact pressure in pin’s withdrawing process during it being loose relative to pinhole was simulated under random vibration environment, and the stress evolution mechanism in loosening process of electrical connector was revealed.Through comparing stress varying trend under triaxial random vibration and that under uniaxial random vibration, according to differences of three intervals, looseness characteristics of electrical connector under triaxial vibration were compared with those under uniaxial vibration, and a triaxial vibration stress screening method for connector looseness was provided.The mapping relationship between stress and resistance of electrical connector was derived by using R.Holm expression for relation between contact resistance and contact pressure, and the monitoring of contact stress between pin and pinhole was converted into monitoring of contact resistance to solve the technical problem of dynamic stress inside pinhole being difficult to measure.

关键词

电连接器 / 随机振动 / 接触应力 / 接触电阻 / 有限元分析 / 松动特性

Key words

electrical connector / random vibration / contact stress / contact resistance / finite element analysis / loosening characteristics

引用本文

导出引用
刘少杰1,仇原鹰1,白金1,杜建功1,李静1,王海东2,王肇喜2,张磊3. 三轴随机振动下电连接器的松动机理及应力-电阻映射关系研究[J]. 振动与冲击, 2021, 40(11): 190-195
LIU Shaojie1, QIU Yuanying1, BAI Jin1, DU Jiangong1, LI Jing1, WANG Haidong2, . Loosening mechanism and stress-resistance mapping relationship of electrical connector under triaxial random vibration[J]. Journal of Vibration and Shock, 2021, 40(11): 190-195

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