汽车电连接器, 室内试验, 强化系数, Miner 线性累积损伤理论, 雨流计数法

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.