Smart Structures and Systems

  • 제1권3호
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  • Pages.257-266
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  • 2005
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Wideband Lamb wave analysis based on continuous wavelet transform

  • Shi, Lihua (Laboratory of Electromagnetics, Nanjing Engineering Institute) ;
  • Wang, Xinwei (The Aeronautical Science Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics) ;
  • Li, Gang (The Aeronautical Science Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics) ;
  • Zhang, Lingyan (Laboratory of Electromagnetics, Nanjing Engineering Institute)
  • 투고 : 2004.08.30
  • 심사 : 2005.04.29
  • 발행 : 2005.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In Lamb wave detection of damages in smart structures, the excitation pulse is usually designed as a narrow band burst wave for the convenience of analysis and recognition. However, the wideband excitation can excite more modes in plate/shell structure and thus provides extra information for changes of the structure. This paper presents a method that can extract information in wideband Lamb wave signals. By transforming the detected signals into various sub-frequency band, the measured signal can be converted to its equivalences of narrow band excitations, therefore, the information in different frequency bands can be acquired from a single test and in the same time the complicity of wideband signal can be simplified. Some test results are provided to verify this method.

키워드

과제정보

연구 과제 주관 기관 : Chinese Natural Science Foundation

참고문헌

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피인용 문헌

  1. Wavelet modeling of signals for non-destructive testing of concretes vol.22, pp.5, 2011, https://doi.org/10.1088/0957-0233/22/5/055702
  2. High spatial resolution imaging for structural health monitoring based on virtual time reversal vol.20, pp.5, 2011, https://doi.org/10.1088/0964-1726/20/5/055018