On the methods of obstructions management based on security in the airport clearance area
Xiaolei Chong, Xu Jinliang · Applied Mechanics and Materials · 2009
In this article,we have brought about a model on how to manage the obstructions in the airport clearance area.As is known,the obstruction in the airport clearance area is one of the chief security indexes for qualitative evaluation in Chinese airport management,but there is no quantitative index,which seems to be unreasonable.Seeing the need,we suggest classifying the obstruction objects into three grades.In airport engineering,if an obstruction influences the aircraft flight,it should be described as both a qualitative problem as well as a quantitative one.It is also unscientific to define the same limited height for all airports,for different airports have different flight control characteristics.Focusing on this situation,we have set up an innovated evaluation index system,including all the influential factors both of qualitative nature and of quantitative nature.With the improved method,all obstructions can be managed more scientifically and reasonably than before.Next,based on the testing data,we have put forward the idea of clearance safety factor which indicates the relation between limited height and its safety altitude.In addition,according to the statistical theory,it can be found that the probability distribution of the safety factor should abide by the distribution of extremum,and with the distribution of the safety factor,it is possible to work out the hazards likely to be caused by the different obstructions in the airport clearance area so that an innovated method can be formulated to limit the heights of the obstructions.Furthermore,different safety factors can be used in different airports according to their different flight missions and their own comprehensive flight characteristics.Thus,it can be seen that our research and methods on the safety evaluation on the obstructions in the airport clearance area make up the traditional management methods both in theory and practice.