Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
권호 표지
DOI QR코드

DOI QR Code

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

보간법을 이용한 옥타브 밴드폭 음향 하중 SPL의 시계열 데이터 생성

  • 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)
  • 고은수 (충남대학교 항공우주공학과) ;
  • 김인걸 (충남대학교 항공우주공학과) ;
  • 전민혁 (충남대학교 항공우주공학과) ;
  • 조현준 (충남대학교 항공우주공학과) ;
  • 박재상 (충남대학교 항공우주공학과) ;
  • 김민성 (국방과학연구소 항공기술연구원)
  • Received : 2020.10.27
  • Accepted : 2021.01.29
  • Published : 2021.02.05
Download PDF
⟨ Previous Next ⟩

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

References

  1. J. M. Jenkins and R. D. Quinn, "A Historical Perspective of the YF-12A Thermal Loads and Structures Program," NASA Technical Memorandum 104317, 1996.
  2. T. Beier and P. Heaton, "High Speed Research Program Sonic Fatigue Summary Report," NASA/CR-2005-213742, 2005.
  3. R. D. Blevins, et. al., "Themo-Vibro-Acoustic Loads and Fatigue of Hypersonic Flight Vehicle Structure," Goodrich Aerostructures Group, Final Report, 2009.
  4. D. Glass, "Ceramic Matrix Composite(CMC) Thermal Protection Systems(TPS) and Hot Structures for Hypersonic Vehicles," 15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2008.
  5. M. Behnke, et. al., "Thermal-Acoustic Analysis of a Metallic Integrated Thermal Protection System Structure," The Proceedings of the 51st AIAA/ASME/ASCE/AHS/ASC Structures, pp. 3121, 2010.
  6. L. Liu, Q. Gua, and T. He, "Thermal-Acoustic Fatigue of a Multilayer Thermal Protection System in Combined Extreme Environments," Advances in Mechanical Engineering, 2014.
  7. J. B. Park, et. al., "Data Acquisition of Time Series from Stationary Ergodic Random Process Spectrums," Journal of Ocean Engineering and Technology, Vol. 25, No. 2, pp. 120-126, 2011. https://doi.org/10.5574/KSOE.2011.25.2.120
  8. J. W. Miles, "On Structureal Fatigue under Random Loading," Journal of the Aeronautical Sciences, Vol. 21, No. 11, pp. 753-762, 1954. https://doi.org/10.2514/8.3199
  9. T. Dirlik, "Application of Computers in Fatigue Analysis," Ph.D. Thesis, The University of Warwick, 1985.
  10. D. Benasciutti, "Fatigue Analysis of Random Loadings," Ph.D. Thesis, The University of Ferrara, 2004.
  11. K. Ortiz and N. K. Chen, "Fatigue Damage Prediction for Stationary Wideband Processes," The Proceedings of the International Conference on Applications of Statistics and Probability in Soil and Structure Engineering, 1987.
  12. L. D. Lutes and C. E. Larsen, "Improved Spectral Method for Variable Amplitude Fatigue Prediction," Journal of Structural Engineering, Vol. 116, No. 4, pp. 1149-1164, 1990. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:4(1149)
  13. P. H. Wirsching and M. C. Light, "Fatigue under Wide Band Random Stresses," Journal of the Structural Division, Vol. 106, No. 7, pp. 1593-1607, 1980. https://doi.org/10.1061/JSDEAG.0005477
  14. D. Benasciutti and R. Tovo, "Spectral Methods for Lifetime Prediction under Wide-band Stationary Random Processes," International Journal of fatigue, Vol. 27, No. 8, pp. 867-877, 2005. https://doi.org/10.1016/j.ijfatigue.2004.10.007
  15. E. S. Go, et. al., "Fatigue Life Prediction in Frequency Domain Using Thermal-Acoustic Loading Test Results of Titanium Specimen," Journal of Mechanical Science and Technology, Vol. 34, No. 10, pp. 4015-4024, 2020. https://doi.org/10.1007/s12206-020-2212-y