U.S.-Romania Engineering Research on New Methods for Computing Electromagnetic Fields Generated by Transducers of Arbitrary Shapes

这个美国-罗马尼亚密歇根州立大学的Lalita Udpa和罗马尼亚国家技术物理研究发展研究所的Raimond Grimberg之间的研究项目将研究旋转磁场在分层圆柱形介质中的影响，目的是在现场对圆柱形管道进行无损评估。他们的方法有两个主要组成部分：1）基于在测试条件下在管壁中产生旋转磁场的新的无损评价方法的开发和2）基于圆柱坐标中的并矢绿色函数的操作的分析模型的开发。罗马尼亚团队计划使用由此产生的模拟模型来解决核和天然气运输特定的不同材料不连续性的正问题管道 它们的理论模型和数值模拟预测的信号将通过实验测量进行验证。 最后，将设计和建造一个实验系统，包括旋转磁场探头和相关的控制仪器，然后在罗马尼亚Cernadova核电站进行测试。 结果预计将导致系统和组件，如传感器，控制设备和数字代码和算法，可以结合起来进行非侵入性无损评估，能够诊断电力和能源工业基础设施的许多关键要素的条件。该工程研究项目通过使美国和中欧的专家能够联合收割机互补人才并在共同感兴趣和能力强的领域共享研究资源来实现推进科学知识的计划目标。 更广泛的影响包括通过在合作机构工作将美国初级研究人员引入国际研究界，并直接参与项目的先进建模技术和实验设计。

This U.S.-Romanian research project between Lalita Udpa of Michigan State University and Raimond Grimberg of the Romanian National Institute of Research Development for Technical Physics will examine the effect of rotating magnetic fields in a layered cylindrical media with the goal of conducting nondestructive evaluations of cylindrical tubes and pipes in the field. Their approach has two major components: 1) development of a new nondestructive evaluation method based on the creation of a rotating magnetic field in a pipe wall under test conditions and 2) development of an analytical model for the operation based on the dyadic Green's functions in cylindrical coordinates.The US-Romanian team plans to use the resulting simulation model to solve the forward problem for different material discontinuities that are specific for both nuclear and gas transportation pipelines. Their theoretical models and signals predicted by numerical simulations will be validated by experimental measurements. Finally, an experimental system including rotating magnetic field probes and associated control instrumentation will be designed and built, then tested at the Romanian Cernadova nuclear power plant. Results are expected to lead systems and components such as a transducer, control equipment and numerical codes and algorithms, that can be combined to conduct un-invasive nondestructive evaluations capable of diagnosing conditions in many critical elements of the power and energy industrial infrastructure. This engineering research project fulfills the program objective of advancing scientific knowledge by enabling experts in the United States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence. Broader impacts include the introduction of U.S. junior researchers to the international research community through work at the partner institution and direct involvement in the project's advanced modeling techniques and experimental design.