Vibroacoustic analysis in the assessment of the technical condition of the aircraft airframe composite elements
1
Politechnika Poznańska / Poznan University of Technology
2
31st Tactical Air Force Base Poznań-Krzesiny
Submission date: 2020-11-23
Final revision date: 2021-03-25
Acceptance date: 2021-03-29
Online publication date: 2021-03-30
Publication date: 2021-03-30
Diagnostyka 2021;22(2):11-20
KEYWORDS
TOPICS
ABSTRACT
The paper presents the method of assessment of the technical condition of the leading edge of the horizontal stabilizer of an F-16 Block C aircraft made from composite materials. The described method was an experimental measurement of the acoustic pressures generated by the technically operational element and the element with the distorted structural continuity and then a comparison of these pressures in the curves of time and frequency in order to assess how the damage impacts the parameters of the acoustic wave. The test was performed in a dual-channel system, the pressure was induced through impacts on the investigated element with an impact hammer and then, based on the measured induction parameters and the generated acoustic wave, the function of frequency response was calculated, based on which the authors assessed how the structural damage influenced the curve characteristics of the acoustic pressure in the domain of frequency. The described method may be used as an efficient method of non-destructive diagnostics of the airframe elements of an aircraft.
FUNDING
The presented results have been co-financed from the subsidies appropriated by the Ministry of Science and Higher Education - 0416/SBAD/0001
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