摘要
为了研究建立飞机机轮与特性材料拦阻系统(Engineered Material Arresting System,简称EMAS)之间作用力的计算模型,设计建造了专门的实验装置。通过改变机轮尺寸、运动速度、负重、轮胎胎压,泡沫材料的厚度与强度等参数,开展了大量实验,发现了泡沫材料在机轮碾压下的一些物理现象,获得了实验数据。在这些实验结果的基础上建立了拦阻力模型,并对模型的准确度进行了验证。研究表明:1)机轮运动速度对拦阻力的影响较小;2)被机轮碾压后材料是处于压透状态还是处于未压透状态对拦阻力有重要影响;3)泡沫材料的强度水平对拦阻力的影响是复杂的,增加材料强度可能降低拦阻力;4)建立的拦阻力模型较好地反映了实验现象;5)在实验范围内,模型对机轮所受拦阻力计算结果相对偏差的平均值小于10%,最大相对偏差为17%。
The experimental device was constructed for modeling the drag force exerted on the aircraft which had run into the Engineered Material Arresting System （EMAS）. A number of experiments were conducted upon the device with variant dimensions of aircraft wheel, speed, carried weight, tire pressure, thickness and strength of the foamed concrete. The behavior of foamed concrete under rolling of aircraft wheel was observed and experimental data were recorded. Based on experiment results, the drag force model was established and its accuracy was verified. It is concluded that： 1） Wheel speed has a minor effect on the drag; 2） Rolled by the wheel, the condition of foamed concrete, either crushed through or crushed halfway, has significant impact on the drag; 3） The foamed concrete strength has complicated influence on the drag, and the increase in material strength may lead to the decrease in drag; 4） The established drag model is consistent well with the experimental observations; 5） The comparsion between the drag model and experimental results shows that the average relative error is less than 10% with the largest one being 17%.
出处
《工程力学》
EI
CSCD
北大核心
2015年第8期243-249,共7页
Engineering Mechanics
基金
国家科技支撑计划课题项目(2012BAG04B02)
国家自然科学基金民航联合研究基金重点项目(U1233203)
关键词
安全工程
航空安全
特性材料拦阻系统
实验研究
力学模型
单轮负载实验装置
safety engineering
aviation safety
Engineered Material Arresting System （EMAS）
experimemtal study
mechanic model
single wheel load experimental device
