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http://dx.doi.org/10.9766/KIMST.2021.24.1.001

Generation of Time Series Data from Octave Bandwidth SPL of Acoustic Loading Using Interpolation Method  

Go, Eun-Su (Department of Aerospace Engineering, Chungnam National University)
Kim, In-Gul (Department of Aerospace Engineering, Chungnam National University)
Jeon, Minhyeok (Department of Aerospace Engineering, Chungnam National University)
Cho, Hyun-Jun (Department of Aerospace Engineering, Chungnam National University)
Park, Jae-Sang (Department of Aerospace Engineering, Chungnam National University)
Kim, Min-Sung (Aerospace Technology Research Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.24, no.1, 2021 , pp. 1-11 More about this Journal
Abstract
Thermal protection system structures such as double-panel structures are used on the skin of the fuselage and wings to prevent the transfer of high heat into the interior of an high supersonic/hypersonic aircraft. The thin-walled double-panel skin can be exposed to acoustic loads by high power engine noise and jet flow noise, which can cause sonic fatigue damage. In order to predict the fatigue life of the skin, the octave bandwidth SPL should be calculated as narrow bandwidth PSD or acoustic load history using interpolation method. In this paper, a method of converting the octave bandwidth SPL acoustic load into a narrow bandwidth PSD and reconstructed acoustic load history was investigated. The octave bandwidth SPL was converted to the narrow bandwidth PSD using various interpolation methods such as flat, log and linear scale, and the probabilistic characteristics and fatigue damage results were compared. It was found that average error of fatigue damage index by the log scale interpolation method was relatively small among three methods.
Keywords
Acoustic Load; Sound Pressure Level; Octave Bandwidth; Narrow Bandwidth; Fatigue Damage;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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