Structural health monitoring of cylindrical structures using guided ultrasonic waves
Structural health monitoring of cylindrical structures using guided ultrasonic waves
复制标题
DOI：
10.1007/s00707-012-0634-z
复制
发表时间：
2012-03
期刊：
影响因子：
2.7
通讯作者：
L. Gaul;H. Sprenger;C. Schaal;S. Bischoff
中科院分区：
文献类型：
--
作者：
L. Gaul;H. Sprenger;C. Schaal;S. Bischoff
结构健康监测是土木工程领域中一个迅速兴起的研究领域。SHM概念是基于集成的传感器和执行器来评估结构状态。除了常用的结构响应方法和其他无损检测技术外，基于波的超声技术由于其灵活性而被广泛使用。监测电缆结构，如架空输电线路或斜拉索在悬索桥是这些波为基础的方法的目标之一。这些结构经受老化、腐蚀和其他静态和动态载荷（例如，风、温度）。圆柱形结构用作波导，从而可以用单个超声换能器监测大距离。然而，波的传播是多模态的和分散的，这使得波动的分析和监测应用的开发变得复杂。这项工作解决了几个方面的导波在圆柱体中的传播，特别是在不连续性的反射和透射的有限元和边界元方法的分析。
The research field of structural health monitoring (SHM) in the realm of civil engineering has emerged rapidly. SHM concepts are based on integrated sensors and actuators to evaluate the structural state. Beside common structural response methods and other nondestructive testing techniques, wave-based ultrasonic techniques are widely used especially because of their flexibility. Monitoring cable structures such as overhead transmission lines or stay cables in suspension bridges is one objective of those wave-based methods. These structures are subject to aging, corrosion and other static and dynamic loads (e.g., wind, temperature). The cylindrical structures act as waveguides whereby monitoring of large distances with a single ultrasonic transducer is possible. However, the wave propagation is multimodal and dispersive, which complicates analysis of the wave motion and development of monitoring applications. This work addresses several aspects of the propagation of guided waves in cylinders, especially the analysis of reflection and transmission at discontinuities using finite element and boundary element methods.