|
|
|
| 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 |
1.School of Mechano-Electronic Engineering，Xidian University，Xi’an 710071,China;
2.Shanghai Spaceflight Precision Machinery Research Institute，Shanghai 201600,China;
3.China Aviation Optical-Electrical Technology Co., Ltd., Luoyang 471000, China |
|
|
|
|
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.
|
|
Received: 20 January 2020
Published: 15 June 2021
|
|
|
|
［1］庄表中.有接插件的电器产品、电子设备如何防止累积振动引起的故障［J］.振动与冲击,2007,26(1):154.
ZHUANG Biaozhong.How to prevent faults caused by cumulative vibration in electrical products and electronic equipment with connectors ［J］.Journal of Vibration and Shock, 2007,26(1): 154.
［2］杨奋为.航天电连接器质量检验专题讲座 第5讲 航天电连接器的力学性能检验(下)［J］.质量与可靠性, 2007(6): 54-58.
YANG Fenwei.Lecture fifth on quality inspection of spaceflight electrical connectors, mechanical performance test of space electrical connectors (Volume 2) ［J］.Quality and Reliability, 2007(6): 54-58.
［3］邓锐, 魏武.连接器接触瞬断监测技术与方法［J］.电子产品可靠性与环境试验, 2016, 34(5): 42-46.
DENG Rui, WEI Wu.Technology and method for monitoring contact break of connector ［J］.Electronic Product Reliability and Environmental Test,2016, 34(5): 42-46.
［4］曹芝腑, 谭志勇, 姜东, 等.基于时频分析的高温振动环境螺栓连接件松动判别［J］.振动与冲击, 2019, 38(17): 205-210.
CAO Zhifu, TAN Zhiyong, JIANG Dong, et al.Looseness determination of bolted joints in high temperature and vibration environment based on time-frequency analysis ［J］.Journal of Vibration and Shock, 2019, 38 (17): 205-210.
［5］SAWCHYN I, SPROLES E S.Optimizing force and geometry parameters in design of reduced insertion force connectors［J］.IEEE Transactions on Components, Hybrids, and Manufacturing, Technology, 1992, 15(6): 1025-1033.
［6］ZHOU X, SCHOEPF T.Detection and formation process of overheated electrical joints due to faulty connections［C］∥26th International Conference on Electrical Contacts, jointly held with 4th International Conference on Reliability of Electrical Products & Electrical Contacts.Beijing: IEEE, 2012.
［7］ZHOU X, SCHOEPF T J.Characteristics of overheated electrical joints due to loose connection［C］∥2011 IEEE 57th Holm Conference on Electrical Contacts (Holm).Minneapolis: IEEE, 2011.
［8］BHATTACHARYYA S, CHOUDHURY A, JARIWALA H R, et al.Electrical performance of conductive bolted joints of copper & aluminum bus bars［J］.International Journal of Engineering Technology Science, 2011, 2(4): 275-280.
［9］XIE F, FLOWERS G T, CHEN C, et al.Analysis and prediction of vibration-induced fretting motion in a blade/receptacle connector pair［C］∥Electrical Contacts - 2007, the 53rd IEEE Holm Conference on Electrical Contacts.Pittsburgh：IEEE, 2007.
［10］ISHIMARU Y, MASHIMO K, SUSAI K, et al.Computational modeling for fretting simulation［C］∥Electrical Contacts, 2009 55th IEEE Holm Conference on Electrical Contacts.Vancouver:IEEE, 2009.
［11］龙慧娟.振动对汽车连接器可靠性的影响［D］.北京: 北京邮电大学, 2013.
［12］PERRINET O, FOUVRY S, ALQUIER O.Application of the friction energy density approach to predict electrical contact endurance in a silver-plated coating subjected to fretting wear［C］∥2013 IEEE 59th Holm Conference on Electrical Contacts (Holm 2013).Newport: IEEE, 2013.
［13］MOUSTAFA G.Studies on mechanical contact devices for bolted bus-bar connections［J］.International Journal of Applied Sciences and Engineering Research, 2013, 2(2): 128-136.
［14］YUSA N, SAWADA S.Demonstration of low-frequency vibration tests to evaluate bolt loosening［J］.International Journal of Applied Electromagnetics and Mechanics, 2016,52(1/2): 86-94.
［15］骆燕燕, 武雄伟, 田亚超, 等.冲击应力对电连接器性能影响的仿真研究［J］.振动与冲击, 2019, 38(18): 270-276.
LUO Yanyan, WU Xiongwei, TIAN Yachao, et al.
Simulation study on the effect of impact stress on electrical connector performances［J］.Journal of Vibration and Shock, 2019, 38 (18): 270-276.
［16］郭凤仪, 陈忠华.电连接理论及其应用技术［M］.北京: 中国电力出版社, 2008．
［17］HOLM R.Electric contacts theory and applications［M］.Berlin: Springer-Verlag, 1967.
［18］张冠生.电器理论基础［M］.北京: 机械工业出版社, 1989．
|
|
|
|
