A Variation Method for Acoustic Wave Imaging of Two Dimensional Targets

FENG Wen-jie; ZOU Zhen-zhu

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Article Navigation > Applied Mathematics and Mechanics > 2003 > 24(6): 619-623

FENG Wen-jie, ZOU Zhen-zhu. A Variation Method for Acoustic Wave Imaging of Two Dimensional Targets[J]. Applied Mathematics and Mechanics, 2003, 24(6): 619-623.

Citation:

FENG Wen-jie, ZOU Zhen-zhu. A Variation Method for Acoustic Wave Imaging of Two Dimensional Targets[J]. Applied Mathematics and Mechanics, 2003, 24(6): 619-623.

Citation:

FENG Wen-jie, ZOU Zhen-zhu. A Variation Method for Acoustic Wave Imaging of Two Dimensional Targets[J]. Applied Mathematics and Mechanics, 2003, 24(6): 619-623.

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A Variation Method for Acoustic Wave Imaging of Two Dimensional Targets

Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute, Shijiazhuang 050043, P. R. China

Received Date: 2001-03-03
Rev Recd Date: 2003-02-19
Publish Date: 2003-06-15

Abstract

Abstract

A new way of acoustic wave imaging was investigated. By using the Green function theory a system of integral equations, which linked wave number perturbation function with wave field, was firstly deduced. By taking variation on these integral equations an inversion equation, which reflected the relation between the little variation of wave number perturbation function and that of scattering field, was further obtained. Finally, the perturbation functions of some identical targets were reconstructed, and some properties of the novel method including converging speed, inversion accuracy and the abilities to resist random noise and identify complex targets were discussed. Results of numerical simulation show that the method based on the variation principle has great theoretical and applicable value to quantitative nondestructive evaluation.
- acoustic wave,
- flaw identification,
- perturbation function,
- variation,
- complex target,
- quantitative nondestructive evaluation

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References(8)

References

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