中国机械工程 ›› 2010, Vol. 21 ›› Issue (15): 1885-1889.

• 车辆工程 • 上一篇    

汽车电连接器振动可靠性室内试验强化系数研究

陈剑;修磊;马文明;陆兵;李青
  

  1. 合肥工业大学,合肥,230009
  • 出版日期:2010-08-10 发布日期:2010-09-19

Research on Enhancement Coefficient of Automobile Electrical Connector Lab Reliability Test on Vibration

Chen Jian;Xiu Lei;Ma Wenming;Lu Bing;Li Qing
  

  1. Hefei University of Technology, Hefei, 230009
  • Online:2010-08-10 Published:2010-09-19

摘要:

采用实车路谱时域复现技术,对汽车电连接器进行振动可靠性室内强化试验,研究其在接近实际工况-振动应力和电应力联合作用下的可靠性。由于国标中没有对实车路谱的规定,使得强化试验时间不能确定,试验结果无法评价。用强化系数结合汽车整车质量评价方法,可以解决这些难题。根据材料的Miner线性累积损伤原理,得到用载荷幅值τ表示的强化系数K的数学模型;采用雨流计数法得到时域载荷幅值分布形式;利用国标中规定的正弦试验方法结合数据统计知识得到了电连接器材料的近似疲劳指数m值,最后求得的强化系数与汽车试验场道路强化系数较接近。用强化系数求出强化试验时间以及故障里程,根据故障里程可以对试验结果进行评价。
 

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Abstract:

In order to study the reliability of electrical connector under combined electrical stress and vibration stress, an automobile electrical connector lab test on vibration was done by time-domain replication’s technology of real vehicle road’s signals.
Because there is not requirements of real vehicle road’s signals in national standards, then the enhancement test’s time can not be determined and the test results can not be appraised. These problems can be solved with enhancement coefficient and evaluation methods of the whole automobile’s quality. According to Miner’s rule of materials, mathematical model of enhancement coefficient K could be obtained,which was expressed with τ. Distribution of amplitude in time-domain can be got by rain-flow counting method. Fatigue index m of electrical connector’s materials can be got by sine test which is requested in national standards, enhancement coefficient obtained herein is identical with that on Proving Ground. Failure’s miles and the time of enhancement test can be got with enhancement coefficient. The results of the test can be appraised by failure’s miles.

Key words: automobile electrical connector, lab test, enhancement coefficient, Miner linear cumulative damage theory, rain-flow counting method

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