A structural resolution of air traffic flow network of"big-channel-in-the-sky":Cases of the Beijing-Kunming,Guangzhou-Lanzhou and Shanghai-Lanzhou channels
Air traffic flow network has gradually become a focus topic and core matter of high attention in aca-demic and decision-making fields.At present,the research of air traffic flow network is faced with a major challenge of the detection of interactive air traffic flow.This paper intends to construct a methodological framework for the structural resolution of air traffic flow network of"big-channel-in-the-sky"and apply it to the Beijing-Kunming,Guangzhou-Lanzhou and Shanghai-Lanzhou channels to find out the key constraints of air traffic flow operation.The results are as follows.The absorption effect of air traffic flow delay in the"big-channel-in-the-sky"is obvious.The operating efficiency,distance efficiency and time efficiency in the en route phase are higher than those in the departure/arrival phase,which is mainly due to the flight path differentiation and air traffic flow adjustment in the en route phase.It is quite different from the delay accumulation phenomenon in air maintenance phase identified previously based on the delay cost of air corridor.The construction of the"big-channel-in-the-sky"has greatly changed the obstacles in the shared segment or flight range,and greatly optim-ized the air traffic flow capacity,indicating that the air traffic flow in the"big-channel-in-the-sky"has the char-acteristics of flexible.However,the overall air traffic flow performance of different channels,the change of high-dens-ity airspace expansion and contraction,and the phase transformation of air traffic flow under airspace capacity limita-tion also show personalized differences.The Guangzhou-Lanzhou channel has the most typical characteristics of bal-anced use of airspace.The location and range of the high-density airspace in Beijing-Kunming channel are relatively stable,while the Guangzhou-Lanzhou and Shanghai-Lanzhou channels show the characteristics of variable range and linear decline,respectively,which results in the differential distribution of intra-day congestion phase under the condi-tion of limited airspace capacity.The above differences are caused by the participation of intra-day air traffic flow and its stability,and the convergence degree of go up and go down flight paths.This research shows that the structural res-olution of air traffic flow network is a basic work to fully understand the function of airspace system.The analysis of ATFN structural is a prerequisite to solve the problem of efficient utilization of airspace resources and promote the dy-namic transformation of airspace organization form,especially in the field of airspace strategic planning.
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