基于累积损伤的机场道面剩余寿命预测模型

通过统计分析道面轮迹和道面板荷载应力横向分布规律, 得出了飞机起落架道面通行覆盖次数的计算方法。在道面板中部荷载应力回归公式的基础上, 建立了道面板横向应力分布函数。选取NCHRP1-26方程作为疲劳方程, 通过对A机场过去13年飞机起飞架次的历史数据进行分析, 得出未来7年2种机型飞机的起飞架次, 利用覆盖作用曲线与应力分布函数提出了机场道面累积损伤量的计算方法, 并进行实例验证。分析结果表明: 2年后机场道面的最大累积损伤趋近于1, 即在不采取任何维修措施的情况下, A机场剩余使用寿命为2年, 与实际运营状况相符。可见, 建立的模型有效。

Prediction model of remaining life for airport pavement based on cumulative damage

Through the statistical analysis on the transverse distribution rules of wheel trace and pavement load stress, the calculation method of pavement pass-to-coverage for landing gear was obtained. Based on the regression formula of load stress on the middle part of pavement slab, the lateral stress distribution function of pavement slab was established. NCHRP1-26 function was chosen as fatigue function, the takeoff data of the 2 types of aircrafts in the next 7 years were calculated based on the historical takeoff data of airport A in the past 13 years, the calculation method of cumulative damage for airport pavement was set up according to the coverage curve function and the stress distribution function, and example verification was carried out.Analysis result shows that, the maximum cumulative damage of pavement tends to be 1 after 2 years, which means the remaining life of airport pavement is 2 years without any maintenance measure.It is consistent with the actual operating condition of airport A, so the established model is effective.