基于拉断伸长率预测城轨车辆门密封条寿命

选择拉断伸长率作为城轨车辆门密封条寿命预测性能指标，以其50%保持率作为老化临界值，分别对检测数据采用两点拟合、线性拟合和非线性拟合，预测城轨车辆门密封条寿命。结果表明，根据线性拟合预测密封条寿命会导致“过维护”，采用两点拟合和非线性拟合预测密封条寿命基本兼顾了可靠性和经济性。;The elongation at break was selected for the performance index of life prediction of the sealant strip of urban rail vehicles door（SSURVD），and the 50% retention rate of elongation at break was used as an aging threshold，the service life of the SSURVD was predicted by the measurement of two points fitting，linear fitting and non-linear fitting by the test data.The results showed that the over maintenance was happened according to the service life of the SSURVD predicted by linear fitting measurement.Both reliability and economy were taken basically into account according to the service life of the SSURVD predicted by two points fitting and non-linear fitting