Smart Structures and Systems

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Sensitivity analysis of circumferential transducer array with T(0,1) mode of pipes

  • Niu, Xudong (Department of Engineering Science, University of Greenwich) ;
  • Marques, Hugo R. (TWI Ltd.) ;
  • Chen, Hua-Peng (Department of Engineering Science, University of Greenwich)
  • Received : 2017.09.10
  • Accepted : 2018.03.19
  • Published : 2018.06.25
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Abstract

Guided wave testing is a reliable and safe method for pipeline inspection. In general, guided wave testing employs a circumferential array of piezoelectric transducers to clamp on the pipe circumference. The sensitivity of the operation depends on many factors, including transducer distribution across the circumferential array. This paper presents the sensitivity analysis of transducer array for the circumferential characteristics of guided waves in a pipe using finite element modelling and experimental studies. Various cases are investigated for the outputs of guided waves in the numerical simulations, including the number of transducers per array, transducer excitation variability and variations in transducer spacing. The effect of the dimensions of simulated notches in the pipe is also investigated for different arrangements of the transducer array. The results from the finite element numerical simulations are then compared with the related experimental results. Results show that the numerical outputs agree well with the experimental data, and the guided wave mode T(0,1) presents high sensitivity to the notch size in the circumferential direction, but low sensitivity to the notch size in the axial direction.

Keywords

References

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