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.
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. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(11): 190-195.
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