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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%。
In order to study the calculation model of the force between the aircraft wheel and the Engineered Material Arresting System (EMAS), a special experimental device was designed and constructed. A large number of experiments were carried out by changing the parameters such as wheel size, moving speed, load, tire pressure, foam thickness and strength, and some physical phenomena of foam under wheel rolling were observed. Experimental data were obtained. Based on these experimental results, a resistance model was established and the accuracy of the model was verified. The results show that: 1) the influence of the speed of the wheel on the resistance is small; 2) the material is crushed or pressed into the unpressurized state and has an important influence on the resistance; 3) the strength of the foam The influence of horizontal on the resistance is complicated, and increasing the material strength may reduce the resistance; 4) The established resistance model reflects the experimental phenomena well; 5) In the experimental range, The average relative deviation less than 10%, the maximum relative deviation of 17%.