
科学技术与工程

中国技术经济学会
不平整积水道面条件下飞机着陆性能
Aircraft Landing Performance under Uneven Waterlogged Pavement
为解决飞机在积水道面着陆滑跑时遇到的安全问题,通过建立不同平整度等级的三维随机不平整半幅道面,利用积水分布特征矩阵的方法研究了跑道不平整影响下的着陆带积水分布。并且建立积水跑道飞机着陆滑跑理论模型,使用Simulink工具进行动力学仿真,分析在不同积水分布条件下跑道对飞机着陆性能影响。结果表明:平整度评级“差”(国际平整度指数international roughness index, IRI = 5)相比平整度评级“好”(IRI = 1)的跑道着陆滑跑距离增加约29 m,相比理想平整道面着陆距离增加了3.7%,且道面平整度降低会导致轮胎滑水风险加剧;若飞机接地速度从62 m/s提升到82 m/s,着陆距离将直接增加约520 m,增加了约87%;降雨强度1 mm/min相较干燥跑道的着陆滑跑距离增加了约20%,降雨强度从1 mm/min提升至3 mm/min的情况下,降雨强度每增加1 mm/min着陆距离增加6.5 m和7.4 m。可见道面不平整位置处,接地速度越大,则到达同一位置时的速度也越大,该位置附着系数降低幅度也越大,最大可达11.3%。随着降雨强度的增大,附着系数逐渐降低,降雨强度达到3 mm/min时,附着系数较干燥道面降低约20%。
In order to solve the safety problems encountered when aircraft land and taxi on runway surfaces with accumulated water, three-dimensional random uneven half-runway surfaces with different flatness grades were established. The distribution of accumulated water in the landing strip under the influence of runway unevenness was used to investigate the accumulated water distribution characteristic matrix. Moreover, a theoretical model for aircraft landing and taxiing on runways with accumulated water was established, and dynamic simulations were carried out using the Simulink tool to analyze the impact of runways on aircraft landing performance under different accumulated water distribution conditions. The results show that compared with "good" (international roughness index, IRI = 1), the landing distance of the runway with "poor" (IRI = 5) increases by about 29 m, and the landing distance of the runway with "poor" (IRI = 1) increases by 3.7% compared with the ideal smooth road. Moreover, the decrease of road smoothness would aggravate the risk of tire water skiing. If the ground speed of the aircraft is increased from 62 m/s to 82 m/s, the landing distance will directly increase by about 520 m, an increase of about 87%. When the rainfall intensity of 1 mm/min increases from 1 mm/min to 3 mm/min, the landing distance increases by 6.5 m and 7.4 m for each increase in rainfall intensity of 1 mm/min. It is concluded that at the uneven position of the pavement, the greater the grounding speed, the greater the speed when reaching the same position, and the greater the reduction of the adhesion coefficient of the position, up to 11.3%. With the increase of rainfall intensity, the adhesion coefficient decreases gradually. When the rainfall intensity reaches 3 mm/min, the adhesion coefficient decreases by about 20% compared with the dry pavement.
积水分布 / 动力学模型 / 接地速度 / 着陆距离 / 附着系数
distribution of waterlogging / dynamical model / touchdown speed / landing distance / adhesion factor
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