基于拉断伸长率预测城轨车辆门密封条寿命

Prediction of Service Life of Door Seal Rubber of Urban Rail Vehicles Based on Elongation at Break

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 as the performance index of life prediction of the seal strip of urban rail vehicle 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 two point fitting,linear fitting and nonlinear fitting of the test data,respectively. The results showed that the service life of the SSURVD predicted by linear fitting would result in over maintenance,while the other two fitting methods could also provide reliable results but the maintenance was more cost efficient.