Study on Environmental Characteristics and Life Evaluation of EMU Battery Cables
The service cycle of a large number of rail transit cables has reached the four-stage repair time of the second round,and its appearance performance has not been abnormal.Under the premise of safety and reliability,the reliability and life of the wire and cable already in service are studied to provide technical support for cost reduction and efficiency increase.The working environment of the cable is the key index that affects its life and reliability.The reliability evaluation can be carried out with high confidence only by selecting the key stress according to the working environment of the cable.This paper firstly analyzes the working environment and failure mechanism of battery power supply cable.Then,based on the failure mechanism and working environment,the reliability and accelerated life test scheme of the cable are designed.Based on the analysis of the test data and the accelerated life model of the cable,the reliability life of the cable is evaluated.The test results show that the insulation aging of the cable can be accelerated under the condition of thermal stress,and the remaining life of the cable reaching the fourth round repair is 17.4 years.
NETL
NSTL
万方数据
