Raillon R, Lecoeur-Taibi I
Commissariat a l'Energie Atomique, CEREM, CEA-Saclay, Gif-sur-Yvette, France.
Ultrasonics. 2000 Mar;38(1-8):527-30. doi: 10.1016/s0041-624x(99)00067-0.
Modeling tools have been developed at the French Atomic Energy Commission (CEA) for the simulation of ultrasonic non-destructive testing inspections. In this paper the model for the prediction of echoes arising from defects within a piece (Mephisto) is presented and some examples are given and compared with experimental results. The model for computing wave defect interaction is based on Kirchhoff's approximation, and uses the principle of reciprocity and a mode-by-mode (between the transducer and the defect) calculation of the echoes. It accounts for possible mode conversions. These approximations and other approximations for the radiated field incident on the defect allow us to obtain a formulation of the echo received at the transducer, which is able to be computed rapidly.
法国原子能委员会（CEA）已开发出用于模拟超声无损检测的建模工具。本文介绍了用于预测工件内部缺陷产生的回波的模型（Mephisto），并给出了一些示例，与实验结果进行了比较。用于计算波与缺陷相互作用的模型基于基尔霍夫近似，并采用互易原理以及逐模式（在换能器和缺陷之间）计算回波。它考虑了可能的模式转换。这些近似以及对入射到缺陷上的辐射场的其他近似使我们能够得到换能器接收到的回波的表达式，该表达式能够快速计算。
