飞机轮载作用下轮辙断面特征与评价指标研究  

Rutting profile characteristics and evaluation indices under aircraft wheel load

作　　者：李岳[1] 赵夫朋 蔡靖[1] LI Yue;ZHAO Fupeng;CAI Jing(College of Airport Engineering,CAUC,Tianjin 300300,China)

机构地区：[1]中国民航大学机场学院,天津300300

出　　处：《中国民航大学学报》2020年第3期18-22,共5页Journal of Civil Aviation University of China

摘　　要：普通轮辙试验与实际道面状况下的轮辙断面特征存在较大差异,导致轮辙指标代表性不足。选取美国道面性能测试中心(NAPTF)CC5试验数据,利用ABAQUS建立三维柔性道面结构体系轮辙分析模型,通过半正弦波形加载曲线模拟移动循环加载过程,在验证模型合理性与适用性的基础上,提出符合复杂轮辙断面特征的评价指标。再现了因飞机荷载作用位置横向偏移引起轮辙曲线产生多个弯折点的分布特征,提取了弯折特征点的轮辙深度值,经处理得到平均轮辙深度和标准差。分析结果表明:平均轮辙深度和标准差可较好地描述轮辙全断面特征;环境温度因素对轮辙变形分布及发展影响显著,50℃条件下平均轮辙深度较CC5试验结果高出40%,标准差增幅达70%。Rutting profile characteristic obtained from ordinary rutting test can be quite different from the actual situation,which makes the rut depth indices insufficiently representative. Based on the CC5 test carried out by NAPTF, a 3D rutting analysis model of flexible pavement structure is established by using ABAQUS. A load curve of halfsine wave is adopted to simulate the cyclic load process of the moving aircraft gears. The feasibility and accuracy of the model are then verified and evaluation indices are proposed considering the complexity of rutting profile characteristics. The load position lateral shift of aircraft gears is well reproduced in the simulation, therefore a series of turning points appeared in the rutting curves. The rutting depth of such points were then extracted, and the average rut depth and standard deviation were obtained after processing. Analyzingresults indicate that the average rutting depth and standard deviation can be used to describe the full-section feature of rutting profile.The environment temperature has notable impact on the distribution and development of rutting deformation. The simulated average rutting depth under the condition of 50℃ can be higher than that of the CC5 the results by 40%, and the standard deviation was increases by 70%.

关 键 词：飞机荷载 轮辙断面 柔性道面 评价指标 

分 类 号：V351.11[航空宇航科学与技术—人机与环境工程]