한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제20권2호
  • /
  • Pages.185-190
  • /
  • 2010
  • /
  • 1598-2785(pISSN)
  • /
  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
권호 표지
DOI QR코드

DOI QR Code

저속회전축의 균열 검출을 위한 음향방출기법의 적용

Application of the AE Technique for The Detection of Shaft Crack with Low Speed

  • 구동식 (경상대학교 대학원 정밀기계공학과) ;
  • 김재구 (경상대학교 대학원 정밀기계공학과) ;
  • 최병근 (경상대학교 해양산업연구소)
  • 발행 : 2010.02.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Condition monitoring(CM) is a method based on non-destructive test(NDT). So, recently many kind of NDT were applied for CM. Acoustic emission(AE) is widely used for the early detection of faults in rotating machinery in these days because of high sensitivity than common accelerometers and detectable low energy vibration signals. And crack is considered one of severe fault in the rotating machine. Therefore, in this paper, study on early detection using AE has been accomplished for the crack of the low-speed shaft. There is a seeded initial crack on the shaft then the AE signal had been measured with low-speed rotation as the applied load condition. The signal detected from crack in rotating machine was detected by the AE transducer then the trend of crack growth had found out by using some of feature values such as peak value, skewness, kurtosis, crest factor, frequency center value(FC), variance frequency value(VF) and so on.

키워드

참고문헌

  1. Sekhar, A. S. and Prabhu, B. S., 1998, “Condition Monitoring of Cracked Rotors Through Transient Response,” Mech. Mach. Theory., Vol. 33, No. 8, pp. 1167-1175. https://doi.org/10.1016/S0094-114X(97)00116-X
  2. Mba, D. and Hall, L. D., 2002, “The Transmission of Acoustic Emission Across Largescale Turbine Rotors,” NDT&E International, Vol. 35, pp. 529-539. https://doi.org/10.1016/S0963-8695(02)00026-9
  3. Wang, X. H., Zhu, C. M., Mao, H. L. and Huang, Z. F., 2009, “Wavelet Packet Analysis for the Propagation of Acoustic Emission Signals Across Turbine Runners,” NDT&E International, Vol. 42, pp. 42-46. https://doi.org/10.1016/j.ndteint.2008.07.005
  4. Li, C. and Nordlund, E., 1993, “Technical Note : Effects of Couplants on Acoustic Transmission,” Rock Mechanics and Rock Engineering, Vo. 26, No. 1, pp. 63-69. https://doi.org/10.1007/BF01019869
  5. Sinou, J. J., 2009, “Experimental Response and Vibrational Characteristics of a Slotted Rotor,” Common Nonlinear Sci. Numer. Simulate, Vol. 14, pp. 3179-3194. https://doi.org/10.1016/j.cnsns.2008.10.024
  6. Shi, D. F., Wang, W. J. and Qu, L. S., 2004, “Defect Detection for Bearings Using Envelope Spectra of Wavelet Transform,” J. Vibration and Acoustics, Vol. 126, No. 4, pp. 567-573. https://doi.org/10.1115/1.1804995
  7. Cempel, C., 1991, Vibroacoustic Condition Monitoring, Ellis Horwood, Chichester, UK.
  8. Tang, K. S., Man, K. F., Kwong, S. and He, Q., 1996, “Genetic Algorithms and Their Applications,” IEEE Signal Processing Magazine, Vo. 13, pp. 22-37. https://doi.org/10.1109/79.543973
  9. Jack, L. B. and Nandi, A. K., 2000, "Genetic Algorithms for Feature Extraction in Machine Condition Monitoring with Vibration Signals," IEEE Proceeding of Vision & Image Signal Processing, Vol. 147, pp. 205-212. https://doi.org/10.1049/ip-vis:20000325
  10. Darpe, A. K., Gupta, K. and Chawla, A., 2004, “Coupled Bending, Longitudinal and Torsional Vibrations of a Cracked Rotor,” Journal of Sound and Vibration, Vol. 269, pp. 33-60. https://doi.org/10.1016/S0022-460X(03)00003-8
  11. Ishida, Y., 2008, “Cracked Rotors: Industrial Machine Case Histories and Nonlinear Effects Shown by Simple Jeffcott Rotor,” Mechanical Systems and Signal Processing, Vol. 22, pp. 805-817. https://doi.org/10.1016/j.ymssp.2007.11.005
  12. Jun, O. S., 2008, “Analysis of Harmonic Vibration of Cracked Rotor,” Transactions of Korean Society for Noise and Vibration Engineering, Vo. 18, No. 1, pp. 35-46. https://doi.org/10.5050/KSNVN.2008.18.1.035