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根据终端区空域运行规则,采用网络理论建立了终端区空域网络模型,基于终端区航空器微观行为建立了空中交通流跟驰模型和等待模型,基于NetLogo仿真平台进行了仿真试验,分析了不同入度分布的空域结构对交通流的影响。仿真结果表明:当密度小于等于0.075架次·km-1,速度大于等于0.04km·s-1时,交通流处于自由相;当密度为0.075~0.200架次·km-1且速度大于等于0.04km·s-1时,交通流处于畅行相;当密度大于0.200架次·km-1,小于最大密度时,交通流处于拥塞相;随着航班波作用的减弱,交通流进入反向畅行相,之后进入反向自由相;当进场交通流分布一定,入度值依次为2、3、1时,交通流速度小,密度大,拥塞消散最慢,入度值依次为3、2、1时,交通流速度大,密度小,拥塞消散最快。可知,增大空域网络上游关键节点的入度,使进场交通流提前完成汇聚,有利于交通流快速运行,增大交通流量;减小空域网络下游关键节点的入度,有利于交通流在达到拥塞相后快速完成消散。
According to the rules of airspace operation in terminal area, the terminal area airspace network model is established based on the network theory. The air traffic flow following model and waiting model are established based on the micro-behavior of aircraft in the terminal area. The simulation experiments are conducted based on the NetLogo simulation platform. Impact of Distributed Spatial Structure on Traffic Flow. The simulation results show that the traffic flow is in free phase when the density is less than or equal to 0.075 times · km-1 and the speed is greater than or equal to 0.04km · s-1. When the density is 0.075 ~ 0.200 times · km-1 and the speed is greater than or equal to 0.04km · s-1, the traffic flow is in a smooth phase. When the density is greater than 0.200 sorts km-1 and less than the maximum density, the traffic flow is in a congested phase. With the attenuation of the flight wave, the traffic flow enters a reverse smooth phase, Reverse free phase. When the traffic flow distribution is certain, the inflow values are 2, 3 and 1 in sequence, the traffic flow velocity is small, the density is high, the congestion dissipation is the slowest, and the inflow values are 3, 2 and 1, Traffic flow speed, density, congestion dissipated the fastest. It can be seen that increasing the influx of key nodes in the upper reaches of the airspace network and completing the convergence of the incoming traffic flow ahead of schedule will facilitate the rapid operation of the traffic flow and increase the traffic flow and reduce the entry of the key nodes in the downstream of the airspace network, After the congestion phase to quickly dissipate.