基于多自由度飞机模型的机场道面平整度评价方法

发布时间：2018-05-17 21:06

  本文选题：道路工程 + 整机平整度指数　； 参考：《南京航空航天大学学报》2016年04期

【摘要】：从三自由度飞机模型出发,提出了新的机场道面平整度评价理论,以不同平整度等级的3条测线的道面高程作为输入,在Matlab/Simulink环境中对飞机的三自由度振动方程进行求解,得到飞机机身的3个振动响应量:纵向俯仰角φ、横向滚转角θ及质心处竖向位移。在此基础上计算出道面整机平整度指数(Full aircraft roughness index,FARI)沿跑道纵向的分布曲线;同时计算出相同道面的国际平整度指数(International roughness index,IRI)。分别将FARI,IRI与在相应道面上滑行的飞机加权加速度均方根值进行了相关性分析,相关系数分别为0.980 6和0.886 9。结果表明整机平整度指数FARI更能够客观反应飞机所有机轮覆盖范围内道面起伏情况对飞机滑行过程中颠簸量的影响效果,更适合于机场道面平整度的评价。
[Abstract]:Based on the three-degree-of-freedom aircraft model, a new evaluation theory of airport pavement smoothness is proposed. The plane vibration equation of three degrees of freedom is solved in Matlab/Simulink environment by taking the elevation of three measured lines with different degree of smoothness as input. Three vibration responses of the aircraft fuselage are obtained: longitudinal pitch angle 蠁, transverse roll angle 胃 and vertical displacement at the center of mass. On this basis, the longitudinal distribution curve of the full aircraft roughness index Fari along the runway is calculated, and the international smoothness index of the same pavement is calculated. The correlation between Fari IRI and the root-mean-square (RMS) values of weighted acceleration of aircraft taxiing on the corresponding plane is analyzed, the correlation coefficients are 0.980 6 and 0.886 9, respectively. The results show that the overall smoothness index (FARI) can objectively reflect the effect of the surface fluctuation on the turbulence during the aircraft taxiing, and is more suitable for the evaluation of the airport pavement smoothness.
【作者单位】： 中国民航大学机场学院;
【分类号】：V351.11
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本文编号：1902866