Coupled Elastic Surface Waves in Curved Structures, US-Pakistan Cooperative Research

产品描述： 该项目支持美国科学家、伊利诺伊大学厄巴纳分校理论和应用力学系的John Harris博士和巴基斯坦伊斯兰堡阿扎姆大学数学系的Saleem Asghar博士的合作项目。 该研究旨在通过数学模型研究表面波的传播，表面波在弯曲的弹性表面上滑行，在那里它紧贴表面并衰减到内部。 将研究波从一个表面到另一个表面的耦合。 另外。将研究当这些波撞击破坏内表面的小裂缝或沿着该表面遇到一片粗糙沿着时这些波的散射。 适用范围：该项目允许两名能力互补的著名科学家合作进行重要的科学工作;它有助于了解表面波的特性，这些特性对于检测管道等许多弯曲结构中的问题或潜在问题非常重要。 这位巴基斯坦科学家在该国最重要的大学之一进行研究生教育和研究。 他在流体加载板的声音辐射方面具有专业知识，而美国科学家在高频表面波传播领域具有专业知识。哈里斯博士的一名美国研究生预计将参与这项工作。该项目符合国际方案司的一些重要目标。

Description: This project supports a cooperative project by a US scientist, Dr. John Harris, from the Department of Theoretical and Applied Mechanics, at the University of Illinois, Urbana, and Dr. Saleem Asghar, Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan. The research aims at investigating, with mathematical models, the propagation of a surface wave, that glides over a curved elastic surface, where it clings closely to the surface and decays into the interior. The coupling of waves from one surface to another will be studied. In addition. scattering of such waves as they strike a small crack breaking an interior surface or encounter a patch of roughness along that surface will be studied. Scope: This project allows cooperation of two well known scientists whose capabilities complement each other to do important scientific work; and it helps understand properties of surface waves that are important in detecting problems or potential problems in many curved structures such as pipelines. The Pakistani scientist is in one of that country's most important universities for graduate education and research. He has expertise in the radiation of sound from fluid-loaded plates, while the US scientist has expertise in the area of high-frequency surface wave propagation. A US graduate student of Dr. Harris is expected to participate in this work. This project meets a number of important objectives of the Division of International Programs.