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用Born近似法对杆中球型缺陷的重构

Keywords: 无损检测,弹性动力学,形状重构,Born近似

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Abstract:

为了用三维线弹性动力学的反演方法重构弹性介质中散射体的形状,推导了散射场缺陷体积型积分的表达式.并在远场散射幅值的积分表达式中引入了Born近似,进而用散射幅值的三维逆Fourier变换重构缺陷的形状.给出了杆中球形空穴缺陷几何形状重构的数值结果.

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