不平整激励下机场道面和公路路面

Comprehensive Analysis of Pavement Roughness Evaluation for Airport and Road with Different Roughness Excitation

摘要:

针对目前我国机场道面平整度评价主要沿用高速公路标准体系，提出一种机场道面和公路路面平整度评价的建模与分析方法.建立飞机和汽车动力学模型，选取飞机和汽车竖向加速度响应作为评价指标，提出基于Matlab/Simulink模块仿真分析的流程.以代表机型和车型作为试验对象，在不平整铺面激励下考查竖向加速度响应的差异；并解析运行速度、组成构造、前后轮距、质量分配系数、振动元件、质量和转动惯量等因素对飞机和汽车动力学响应差异的影响程度.最后，根据波音公司疲劳标准，反算机场道面国际平整度指数(IRI)与3 m直尺下最大间隙的标准值，提取机场道面管理的重要的决策参数.

关键词:机场道面; 平整度; 动力学模型; 竖向加速度响应; 评价标准

Abstract:

Considering the fact that the present roughness evaluation criterion of airport pavement still uses that of highway, this paper presented the comprehensive analysis of the roughness evaluation of airport pavement and road surface. By building kinetic models of aircraft and car, and taking vertical acceleration response of aircraft and car as evaluation index, a simulation analysis process based on Matlab/Simulink was conducted. Taking the representive aircraft and car as test subjects, this paper examined the differences in vertical acceleration response on rough pavement excitation, and analyzed the influence of speed, composition structure, front and rear track, quality distribution coefficient, vibrating element, quality and moment of inertia on the dynamic response of car and aircraft. Finally, according to the Boing taxi fatigue life criteria, the criteria value of IRI and the biggest gap under 3 m straight edge for the roughness evaluation of airport pavement were backcalculated respectively, investigating the important decision parameters for airport pavement management.

Key words:airport pavement; roughness; kinetic model; vertical acceleration response; evaluation criteria