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用二维逆Born近似法对杆中方形缺陷的重构

Keywords: Born近似,形状因子,特征函数,反演,散射

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Abstract:

为了重构弹性介质中散射体的形状,在三维弹性波散射问题的Born近似解基础上,进一步分析了在纵波入射条件下二维散射问题的Born近似解,对铝质长杆中的方形空穴缺陷的散射场情况进行了对比分析.提出了在低频下识别缺陷几何特征的二维逆Born近似法,并用此法对铝质长杆中的3种方形空穴缺陷作了计算机模拟.模拟的结果说明用二维逆Born近似法对缺陷几何特征的识别是有效的.

References

[1]  ACHENBACH J D.Wave propagation in elastic solids[M].Amsterdam:Noth-Hollend Pub.Co.,1973.
[2]  GUBERNATISJ E,DOMANY E,KRUMHANSL J A.Formal aspects of the theory of the scattering of ultrasound by flaws in elastic materials[J].Journal of Applied Physics,1977,48(7):2804-2811.
[3]  ROSE J H,RICHARDSON T M.Time domain Born approximation[J].Journal of Nondestructive Evaluation,1982,3: 45-53.
[4]  KITAHARA M,KAZUYUKI N,HIROSE S.Elastodynamic inversion for shape reconstruction and type classification of flaws[J].Wave Motion,2002,36:443-455.
[5]  朱瑾.Born近似方法和弹性波反问题的研究[D].哈尔滨:哈尔滨工业大学航天学院,1987.ZHU Jin.Research on Born approximation and the inverse of elastic wave[D].Harbin:School of Astronautics,Harbin Insti- tute of Technology,1987.(in Chinese)
[6]  HSU D K,ROSE J H,THOMPSON D O.Reconstruction of inclusions in solids using ultrasonic Born inversion[J].Journal of Applied Physics,1984,55(1):162-168.
[7]  DARMON M,CALMON P,BELE B.An integrated model to simulate the scattering of ultrasounds by inclusions in steels[J].Ultrasonics,2004,42:237-241.
[8]  JAIN D L,KANWAL R P.The Born approximation for the scattering theory of elastic waves by two dimensional flaws[J]. Journal of Applied Physics,1982,53(6):4206-4217.

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