关键词：通信检测；组合结构；结构健康监测；波束形成；相控阵
摘 要：Two guided wave SHM approaches were developed in this project. The first approach is based on a guided wave tomographic technique, in which the region surrounded by a sparse sensor array is monitored. The second one is a phased array approach, in which sensors are attached to a structure in a compact format to form an array. The region subjected to inspection and monitoring is the region outside the array. Both techniques have shown an excellent capability of determining damage size, location, and severity. The importance of guided wave mode and frequency control has been demonstrated for both the tomography and the phased array approach. Guided wave annular arrays have been successfully developed as a means of mode and frequency control. Phased annular array transducers with excellent flexibility on guided wave mode tuning have also been investigated. Guided wave tomography with improved robustness to environmental conditions was demonstrated via the application of specially designed annular arrays. Damage detection using phased array beamforming was also achieved. Unique beamformer transducers were developed and applied to both isotropic and anisotropic multilayer composite structures.