Modelling of Ultrasonic Response from Rough Defects

该提案旨在为一项为期三年的研究计划提供资金，该计划旨在研究粗糙表面的超声波反向散射，并具体应用于粗糙裂纹的无损评估（NDE）。这解决了一个重要的工业目标：能够以任何选定的角度和频率自信地预测粗糙缺陷的超声反射，然后可以用于制定所需的检查计划。该研究将扩展两个互补领域的知识：创建一个信封的方法来预测最小的后向散射预计与信心从粗糙度的统计描述，和有限元建模程序的发展，以保证准确，但有效的，从具体粗糙缺陷的详细表示散射建模。这项工作将由帝国理工学院的一个数学和工程团队联合进行。该提案正在英国无损检测研究中心（RCNDE）内提交给有针对性的研究计划，EPSRC为工业驱动的研究指定了资金。

This proposal seeks funding for a three year research programme into the back-scattering of ultrasound from rough surfaces, with specific application to the Non-Destructive Evaluation (NDE) of rough cracks. This addresses an important industrial goal: to be able to predict with confidence the reflection of ultrasound from a rough defect, at any chosen angle and frequency, which could then be used to make the case for a desired plan for inspection. The research will extend knowledge in two complementary areas: the creation of an envelope approach to predict the minimum back-scatter to be expected with confidence from a statistical description of the roughness, and the development of Finite Element modelling procedures to guarantee accurate, but efficient, modelling of the scattering from detailed representations of specific rough defects. The work will be undertaken jointly by a mathematical and an engineering team, both at Imperial College. The proposal is being submitted within the UK Research Centre in NDE (RCNDE) to the targeted research programme, the funding for which is earmarked by EPSRC for industrially driven research.