机场跑道平整度对飞机滑跑的动力响应有较大影响，考虑非一致不平整激励的机场跑道平整度评价方法，使跑道平整度评价结果更符合飞机实际动力响应，避免飞机在平整度评价良好的跑道起降时产生强烈的动力响应，降低不安全事故的发生概率，对机场的安全高效运行有深刻意义。本文通过三维谐波叠加法建立非一致不平整激励跑道模型，以A320飞机为原型建立Adams飞机地面运动模型，并与实测数据对比验证模型准确性，分析道面非一致不平整激励对飞机滑行时动力响应的影响，算例表明，考虑非一致激励后飞机竖向加速度增加12.39%~24.16%，使人体舒适度下降1~2个等级。综合考虑飞机的竖向振动和侧倾转动，提出了驾驶舱综合振动总值作为平整度评价指标，算例表明，"a" _"v" 比相同情况下的驾驶舱竖向加速度加权均方根增大可达41.46%，且较于国际平整度指数（international roughness index，IRI）评价方法更符合实际情况，故驾驶舱综合振动总值能更准确地评价机场跑道平整度。
Abstract
Airport runway roughness has a great impact on the dynamic response of aircraft taxiing. The airport runway roughness evaluation method considering non-uniform uneven excitation makes the runway roughness evaluation results match the actual dynamic response of aircraft, avoids the strong dynamic response of aircraft when taking off and landing on the runway with good roughness grade, and reduces the probability of unsafe accidents, which is of profound significance to the safe and efficient operation of the airport. In this paper, the non-uniform uneven excitation runway model is established by the three-dimensional harmonic superposition method, and the Adams aircraft ground motion model is established based on the A320 aircraft as the prototype. The accuracy of the model is verified by comparing with the measured data, and the influence of the non-uniform uneven excitation on the dynamic response of the aircraft during taxiing is analyzed. Considering the vertical vibration and roll rotation of the aircraft, the total value of cockpit comprehensive vibration is proposed as the roughness evaluation index. Compared with the existing acceleration weighted root mean square and IRI evaluation methods, the results show that the total value of cockpit comprehensive vibration can more accurately evaluate the roughness of airport runway.
关键词
跑道 /
平整度 /
非一致不平整激励 /
评价方法
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Key words
runway /
roughness /
non-uniform uneven excitation /
evaluation method
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