Affiliations: Shaanxi Engineering Research Center for NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Correspondence:
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Corresponding author: Zhenmao Chen, School of Aerospace, Xi'an Jiaotong University, 28 West Xianning Road, Xi'an 710049, Shaanxi, China. Tel./Fax: +86 29 8266 8736; E-mail:[email protected]
Abstract: In this paper, a new efficient numerical method based on
the finite element method (FEM) and the frequency domain summation (FDS)
strategy is proposed for the simulation of the pulsed infrared thermography
non-destructive testing. With use of the FDS strategy, the temperature
distribution due to a pulsed thermal source is simulated based on the
thermal response of series of single-frequency sinusoidal heat sources. An
interpolation strategy is also adopted to reduce the necessary number of
harmonic frequency responses to be calculated, and consequently the
simulation time is saved. A comparison of the FDS strategy and the direct
time domain integration method is also presented, which indicates that the
FDS strategy can simulate pulsed thermography problem with high precision
and can promote simulation efficiency.
Keywords: Numerical simulation, pulse thermography, frequency domain method, NDT
