Method for evaluating the structural compatibility of an aircraft for use on rough runways

摘要

A method for evaluating the structural compatibility of an aircraft for use on a runway having a profile with one or more roughnesses in the form of bumps and/or dips using a computer-based system, and including the steps of: generating a first bump height curve representing elevations or depressions on the runway; comparing the bump height curve with a second bump height curve which is a first reference curve; generating a first power spectral density curve of the profile of the runway; comparing the first power spectral density curve with a second power spectral density curve which is a second reference curve; and authorizing or denying the aircraft the use of the runway on the basis of results of the comparison.

主权项

1. A method for evaluating the structural compatibility of an aircraft (2) for use on a runway (5) having a profile with one or more roughnesses (7, 8) in the form of bumps and/or dips using a computer-based system, comprising the steps of:
generating (102) by said system a first equivalent bump height curve (25) indicative of the elevation and/or depression of the one of more roughnesses (7, 8) of the runway (5) with respect to a reference value; comparing (106) by said system the first equivalent bump height curve (25) with a second equivalent bump height curve (30) indicative of elevation and/or depression limit values of reference roughnesses such that, when the aircraft (2) encounters said reference roughnesses, the stresses transferred to the structure of the aircraft or parts thereof are lower than a first acceptable limit load, the second equivalent bump height curve moreover defining a first acceptability region (31a) and a first non-acceptability region (31b) of said stresses transferred when the aircraft (2) encounters said reference roughnesses; generating (103) by the system a first power spectral density curve (62) using a spectral analysis of the profile of the runway (5); comparing (107) by the system the first power spectral density curve (62) with a second power spectral density curve (60) relating to a profile of a reference runway such that, when the aircraft (2) runs along said reference runway, the stresses transferred to the structure of the aircraft or parts thereof are lower than a second admissible limit load, the second power spectral density curve (60) moreover defining a second acceptability region (61a) and a second non-acceptability region (61b) of said stresses transferred when the aircraft (2) runs along the reference runway; verifying (108) by the system if the first equivalent bump height curve (25) develops entirely within the first acceptability region and if the first power spectral density curve (62) develops entirely within the second acceptability region; and authorizing or denying (112, 114, 116) by the system the aircraft (2) the use of the runway (5) on the basis of the result of said step of verifying (108).