报告题目：基于超声导波的结构健康监测进展
Advances in Structural Health Monitoring: via Ultrasonic Guided Waves
报告人：Cliff J. Lissenden
时间与地点：5月30日 上午9:30 浙江大学玉泉校区教三406
摘要：报告主要介绍美国宾夕法尼亚州立大学在基于超声导波的结构健康监测技术研究中取得的最新进展。该类型的结构健康监测通过固定式传感器的在线无损评价实现。实际上缺陷越早被检测到，维护措施就能越有效，而这取决于导波检测的灵敏度。因此，选择适当的导波模态和检测频率是超声导波结构健康监测的关键。报告介绍的超声导波结构健康监测技术的应用案例包括：铆孔的疲劳缺陷、压电纤维复合传感器、相控阵技术、胶接面检测、微观缺陷预测。
Abstract: This presentation will highlight advances made at Penn State in structural health monitoring via ultrasonic guided waves. This type of structural health monitoring (SHM) is in-situ nondestructive evaluation performed with stay-in-place sensors. In fact the earlier in life the damage can be detected, the better maintenance and operations can be planned. Success in this regard is reliant upon the sensitivity of the guided wave to damage. Therefore, proper mode and frequency selection is critical and will be the underlying theme of the presentation. Applications to be discussed include: fatigue cracks at fastener holes, piezoelectric fiber composite transducers, phased arrays, bonded joints, and detection of precursors to macroscale damage.
Cliff J. Lissenden教授简介
◆ Professor in Engineering Science and Mechanics Department at Pennsylvania State University
美国宾夕法尼亚州立大学工程科学与力学系教授
◆ Director of Ben Franklin Center of Excellence in Structural Health Monitoring
本·富兰克林结构健康检测中心主任
研究方向
他的研究团队从事基于超声导波的结构健康监测研究，最近的研究主要集中在复合材料的分层检测，粘结结构的失效检测，近铆孔处缺陷检测，导波传感器优化，实现导波聚焦的相控阵技术，导波成像。当前的研究重点为微结构的非线性导波特性研究。
Research
Their research group works in the general area of SHM using ultrasonic guided waves，recent research projects focus on delaminations in composite materials, degradation of adhesively bonded joints, characterization of fatigue cracks near fastener holes, development of optimal transducers, real-time phased arrays for ultrasonic beam steering, and tomographic imaging. A current thrust is nonlinear ultrasonic guided waves for microstructure characterization.
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浙江大学数字技术及仪器研究所