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| Study on the contact performance of electric connector under impact environment |
| LUO Yan-yan1, WU Xiong-wei1, TIAN Ya-chao2, YU Chang-chao3 |
1. School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China;
2. Xuji Electric Co., Ltd., Xuchang 461000, China;
3. Bohai New Area Power Branch, Cangzhou City, State Grid Hebei Electric Power Co., Ltd., Cangzhou 061000, China |
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Abstract Impact stress is one of the main environmental factors that affect the contact performance of electrical connectors. In view of the high cost, long consuming time and difficult to implement some high strength environmental tests, the change rules of the contact performance parameters of electrical connector contacts under the impact environment are studied by simulation. Based on the basic principles of theoretical mechanics, the physical model of electrical connector contact was established by ANSYS, and the dynamics model was used to simulate the real impact test, the effects of the test severity level, pulse duration and peak acceleration on the deformation, stress and contact force of contacts were analyzed, and some simulation results were verified by test. The results showed that, during the process of impact test, among the contact parameters, the contact deformation was affected most by the impact. The contact parameters increased slowly and then increased rapidly with the increase of severity level; and they decreased rapidly and then decreased slowly with the increase of pulse duration; but they were basically stable when the peak acceleration changed. It can be seen that the test severity level and pulse duration play dominant roles in the change of contact performance parameters, and the simulation results can provide a theoretical reference for product design.
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Received: 02 June 2017
Published: 28 February 2018
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冲击环境下电连接器接触性能研究
冲击应力是影响电连接器接触性能的主要环境因素之一。针对传统试验成本高、耗时长且难以实现某些高强度环境试验的局限性，采用仿真方法研究冲击环境下电连接器接触件接触性能参数变化规律。结合理论力学基本原理，通过ANSYS建立电连接器接触件实物模型、动力学模块模拟冲击试验，分析了试验严酷等级、冲击脉冲持续时间及峰值加速度对接触件的形变、应力和接触压力等参数的影响，并对接触压力仿真结果进行试验验证。结果表明：冲击试验过程中，接触件形变受冲击影响最大；接触性能参数随严酷等级的增加，先缓慢增大后快速增大；随脉冲持续时间的增加，先急剧下降后缓慢减小；而在峰值加速度变化时基本保持稳定。由此可知，严酷等级和脉冲持续时间对电连接器接触性能参数变化起主导作用，仿真结果可为产品设计提供一定的理论参考。
关键词：
电连接器,
接触性能,
冲击应力,
有限元分析
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