冲击应力对电连接器性能影响的仿真研究

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摘要冲击应力是影响电连接器接触性能的主要环境因素之一，受到冲击碰撞后可能发生突发性接触失效现象。为探究冲击过程中接触性能参数变化规律，采用ANSYS进行仿真研究，建立动力学模块模拟冲击试验，分析了较高严酷等级下，不同峰值加速度及脉冲持续时间对接触件形变、应力和接触压力的影响，并从能量角度进行了分析。结果表明：相比于峰值加速度，脉冲持续时间对接触性能参数变化的影响显著；受到2ms以内的冲击，电连接器会在冲击初期出现瞬断失效现象；但若超过2ms，冲击的影响程度明显降低。冲击能量的增加会对接触件的应力值和塑性变形区域产生影响，并导致接触件发生塑性形变。冲击能量相同时，冲击脉冲持续时间越短，接触性能参数的变化幅度越大。

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关键词 ：电连接器, 冲击应力, 有限元分析, 接触性能, 冲击能量

Abstract：Impact stress is one of the main environmental factors that affects the contact performances of electrical connectors.The intermittency phenomenon may occur after impact.The changes of the contact performance parameters of the contactors in the electrical connector during impact process were studied by numerical simulation, and a dynamic physical model was established to simulate the real impact test.The effects of different peak acceleration and pulse duration of an impact on the contact deformation, stress and contact force were analyzed.And the results analysis was carried out from the view point of energy.The results show that, compared with the peak acceleration, the duration of pulse has a significant effect on the change of the contact performance parameter, and the change curve has an inflection point when the duration is 2ms.The increase of impact energy will affect the stress value and strain region of the contactors, and may lead to the plastic deformation of the contactors.The impact energy duration has a more significant effect on the contact performance parameters than the impact energy.It can be deduced that when subjected to an impact of less than 2ms, the contact failure phenomenon is likely to happen in electrical connectors.

Key words： electrical connector impact stress finite element analysis contact performance Impact energy

收稿日期: 2018-04-03 出版日期: 2019-09-15

引用本文:

骆燕燕1,2,*，武雄伟1,2，田亚超3，刘旭阳4. 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 Yanyan1,2, WU Xiongwei1,2, TIAN Yachao3, LIU Xuyang4. Simulation study on the effect of impact stress on electrical connector performances. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(18): 270-276.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I18/270

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