Modeling for ultrasonic testing is an important tool in industrial sectors concerned with advanced inspection methods. A significant amount of effort has been directed to building hybrid methods, which try to encompass advantages of both asymptotic and numerical methods. In our work, we consider a hybrid coupling method based upon reciprocity relations. By deriving specific formulations for the incident and diffracted fields, we apply this strategy to the case of surface and near-surface flaws. We illustrate this coupling strategy in some canonical 2D and 3D ultrasonic testing configurations.

中文翻译：

---

渐近模型与数值模型之间的耦合策略及其在表面缺陷超声无损检测中的应用

超声波检测建模是涉及先进检测方法的工业部门的重要工具。大量的努力已经指向构建混合方法，它试图包含渐近方法和数值方法的优点。在我们的工作中，我们考虑了一种基于互惠关系的混合耦合方法。通过推导出入射场和衍射场的特定公式，我们将此策略应用于表面和近表面缺陷的情况。我们在一些规范的 2D 和 3D 超声波测试配置中说明了这种耦合策略。