대한건축학회논문집:구조계 (Journal of the Architectural Institute of Korea Structure & Construction)

  • 제32권4호
  • /
  • Pages.3-10
  • /
  • 2016
  • /
  • 1226-9107(pISSN)
  • /
  • 2384-1788(eISSN)
대한건축학회 (Architectural Institute of Korea)
권호 표지
DOI QR코드

DOI QR Code

말단질량을 갖는 테이퍼 원형강관 캔틸레버 보의 균열탐지기법

Crack Detection Method of Tapered Cantilever Pipe-type Beam with a Tip Mass

  • 이종원 (남서울대학교 건축공학과)
  • Lee, Jong-Won (Department of Architectural Engineering, Namseoul University)
  • 투고 : 2015.12.29
  • 심사 : 2016.03.29
  • 발행 : 2016.04.30
⟨ 이전 논문 다음 논문 ⟩

초록

A crack identification method using the change of natural frequencies for tapered cantilever pipe-type cracked beam is presented. Modal properties of tapered cantilever intact beam with a tip mass are identified by applying the boundary conditions to a general solution. An equivalent bending stiffness for cracked beam based on an energy method is used to identify natural frequencies of tapered cantilever thin-walled pipe with a tip mass, which has a through-the-thickness crack, subjected to bending. The identified natural frequencies of the cracked beam are used in constructing training patterns of neural networks. Then crack location and size are identified using a committee of the neural networks. Crack detection was carried out for an example tapered beam using the proposed method, and the identified crack locations and sizes agree reasonably well with the exact values.

키워드

과제정보

연구 과제 주관 기관 : 남서울대학교

참고문헌

  1. Auciello, N. M., & Nole, G. (1998). Vibrations of a cantilever tapered beam with varying section properties and carrying a mass at the free end. Journal of Sound and Vibration, 214, 105-119. https://doi.org/10.1006/jsvi.1998.1538
  2. Chen, D. W., & Wu, J. S. (2002). The exact solutions for the natural frequencies and mode shapes of non-uniform beams with multiple spring-mass systems. Journal of Sound and Vibration, 255, 299-322. https://doi.org/10.1006/jsvi.2001.4156
  3. Chen, Y. Z. (2000). Target function method for evaluating natural vibration frequency of bending beam with adhesive mass. Communications in Numerical Methods in Engineering, 16, 343-355. https://doi.org/10.1002/(SICI)1099-0887(200005)16:5<343::AID-CNM340>3.0.CO;2-9
  4. Dilena, M., Dell’Oste, M. F., & Morassi, A. (2011). Detecting cracks in pipes filled with fluid from changes in natural frequencies. Mechanical Systems and Signal Processing, 25, 3186-3197. https://doi.org/10.1016/j.ymssp.2011.04.013
  5. Ece, M. C., Aydogdu, M., & Taskin, V. (2007). Vibration of a variable cross-section beam. Mechanics Research Communications, 34, 78-84. https://doi.org/10.1016/j.mechrescom.2006.06.005
  6. Gorman, D. J. (1975). Free Vibration Analysis of Beams and Shafts, John Wiley & Sons, 374-379.
  7. Huh, Y. C., Kim, J. K., & Park, S. H. (2007). A study about the damage model of a cantilever beam with open crack generated in whole breadth of the beam. Transactions of the Korean Society for Noise and Vibration Engineering, 11, 936-945.
  8. Lee, J. W., Kim, S. R., & Huh, Y. C. (2014). Pipe crack identification based on the energy method and committee of neural networks. International Journal of Steel Structures, 14, 345-354. https://doi.org/10.1007/s13296-014-2014-0
  9. Lee, J. W. (2015). Fault detection method of tapered cantilever pipe-type beam, Journal of the Architectural Institute of Korea. Structure & Construction Section, 31, 13-20.
  10. Murigendrappa, S. M., Maiti, S. K., & Srirangarajan, H. R. (2004). frequency-based experimental and theoretical identification of multiple cracks in straight pipes filled with fluid. NDT&E International, 37, 431-438. https://doi.org/10.1016/j.ndteint.2003.11.009
  11. Naniwadekar, M. R., Naik, S. S., & Maiti, S. K. (2008). On prediction of crack in different orientations in pipe using frequency based approach. Mechanical Systems and Signal Processing, 22, 693-708. https://doi.org/10.1016/j.ymssp.2007.09.007
  12. Rosa, M. A. D., Lippiello, M., Maurizi, M. J., & Martin, H. D. (2010). Free vibration of elastically restrained cantilever tapered beams with concentrated viscous damping and mass. Mechanics Research Communications, 37, 261-264. https://doi.org/10.1016/j.mechrescom.2009.11.006
  13. Wang, Y. M., Chen X. F., & Heb Z. J. (2011). Daubechies wavelet finite element method and genetic algorithm for detection of pipe crack. Nondestructive Testing and Evaluation, 26, 87-99. https://doi.org/10.1080/10589759.2010.521826
  14. Wu, J. S., & Chen, C. T. (2005). An exact solution for frequencies and mode shapes of an immersed elastically restrained wedge beam carrying an eccentric mass with mass moment of inertia. Journal of Sound and Vibration, 286, 549-568. https://doi.org/10.1016/j.jsv.2004.10.008
  15. Yang, X. F., Swamidas, A. S. J., & Seshadri, R. (2001). Crack Identification in Vibrating Beams Using the Energy Method. Journal of Sound and Vibration, 244, 339-357. https://doi.org/10.1006/jsvi.2000.3498
  16. Ye J., He Y., Chen X., Zhai, Z., Wang, Y., & He, Z. (2010). Pipe crack identification based on finite element method of second generation wavelets. Mechanical Systems and Signal Processing, 24, 379-393. https://doi.org/10.1016/j.ymssp.2009.08.001