首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Experimental Study of Applying Migration Technique in Structural Health Monitoring
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Experimental Study of Applying Migration Technique in Structural Health Monitoring

机译:迁移技术在结构健康监测中的实验研究

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This paper presents experimental results of applying a migration method to interpret the ultrasonic Lamb wave signals for the purpose of realizing quantitative damage identification. A homogeneous isotropic plate is studied with a surface-mounted piezoelectric ceramic (PZT) disk array. The piezoelectric disks function as actuators to excite Lamb waves and also as sensors to receive the waves reflected from the structural anomaly in the plate. The migration technique, which is an advanced technique in geophysics to reverse the reflection wave field and to image the Earth interior, is then used to back-propagate the recorded wave signals and to image the damage in the plate. The migration results from the reflection waves of an artificial damage are presented. It is shown that the existence of the damage is correctly revealed through migration process in the experiment as it has been shown.
机译:本文提出了一种应用迁移方法解释超声波兰姆波信号以实现定量损伤识别的实验结果。用表面安装的压电陶瓷(PZT)磁盘阵列研究了均质的各向同性板。压电盘既用作激励Lamb波的致动器,又用作接收板中结构异常反射波的传感器。迁移技术是地球物理学中用于反转反射波场和对地球内部成像的一种先进技术,然后用于向后传播已记录的波信号并成像板中的损伤。给出了人为破坏的反射波的迁移结果。结果表明,通过迁移过程可以正确地揭示出损伤的存在。

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