The Research Of Single Aircraft Noise Contour Area Prediction Method

Study of the controlling method in aircraft noise pollution around the airport is an important actual problem in the field of civil aviation’s research,improving the designed level of the aircraft and aero-engine,removing the target polluted by aircraft noise around airport and reasonably planning the land of new airport are three important directions of research in the research of the controlling method of the aircraft noise around the airport.By analyzing the data of maximum takeoff weight(MTOW)and noise at the measure points,it is shown there is high linear correlation between the MTOW and noise at measure points,in order to achieve this way to reduce the pollution of the aircraft noise around airport by precisely controlling maximum takeoff weight of the aircraft,the relationship between gnoise contour area of single aircraft on the plane of airport and sum of noise at measure points is studied.Taking the takeoff of aircraft as a case,First,in this thesis,based on the theoretical basis of the relationship between the sound pressure level and the propagative distance,the analytic model of the relationship between the contour area of single aircraft and sum of the noise level at the certification measure points was established,which clearly clarified the linear correlation of them is explained theoretically.Secondly,effective data calculated by the INM from set of 42 selected aircraft is used to verify the validity of the high linear correlation between them,the relationship acquired figure out that changes of the reduction in sum of the noise level at the TO and SL measurement points could result in a reduction’s proportion of given contour area or the reduction of given contour area in the proportion required to reduce the sum value of noise level at the TO and SL measurement points.Finally,using the MTOWand noise level data of the aircraft type of B737-700,B777-300 ER and A320-231 and A318-111,the relationship between the MTOW and sum of the noise level at the TO and SL measurement points was studied,in the meantime,based on the that relationship,application of the relationship between given contour area and sum of the noise level at the TO and SL measurement points,which has studied in the thesis,was illustrate in the noise pollution control of the airport.In a word,this relationship opens a new approach to the quantitative control on the aircraft noise pollution of the airport around community.