Abstract：
One of the most significant benefits of Acoustic Emission (AE) testing over other Non-Destructive Evaluation (NDE) techniques lies in its damage location capability over a wide area. The delta-T mapping technique developed by researchers has been shown to enable AE source location to a high level of accuracy in complex structures. However, the time-consuming and laborious data training process of the delta-T mapping technique has prevented this technique from large-scale application on large complex structures. In order to solve this problem, a Finite Element (FE) method was applied to model training data for localization of experimental AE events on a complex plate. Firstly, the FE model was validated through demonstrating consistency between simulated data and the experimental data in the study of Hsu-Nielsen (H-N) sources on a simple plate. Then, the FE model with the same parameters was applied to a planar location problem on a complex plate. It has been demonstrated that FE generated delta-T mapping data can achieve a reasonable degree of source location accuracy with an average error of 3.88 mm whilst decreasing the time and effort required for manually collecting and processing the training data.
摘要：
声发射（AE）测试相对于其他无损评估（NDE）技术的最重要优势之一在于其在广阔区域内的损坏定位能力。研究人员开发的delta-T映射技术已被证明可以在复杂结构中实现高精确度的AE源定位。然而,delta-T映射技术耗时费力的数据训练过程阻止了该技术在大型复杂结构上的大规模应用。为了解决这个问题,将有限元（FE）方法应用于模型训练数据，以在复杂板上定位实验AE事件。首先,通过证明模拟数据与实验数据之间的一致性来验证FE模型在一个简单的板上研究Hsu-Nielsen（H-N）源。然后，将具有相同参数的有限元模型应用于复杂平板上的平面定位问题。已经证明，FE生成的delta-T映射数据可以实现合理程度的源定位精度，平均误差为3.88mm，同时减少了手动收集和处理训练数据所需的时间和精力。
