Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0238, USA
JASA Express Lett. 2022 Feb;2(2):025601. doi: 10.1121/10.0009610.
This study presents simulation results on passive structural health monitoring of a vibrating elastic structure for defect localization. The object considered in this study consists of a shell equipped with vibration sensors surrounding a vibrating structure such that they are coupled at a finite number of points. An acoustic digital twin (ADT) is used to model the non-defective state of the external shell. A combination of the concept of an ADT together with an adjoint-based high-resolution array-processing approach was used to detect and locate a defect on the structure under inspection.
本研究提出了一种针对振动弹性结构缺陷定位的被动结构健康监测的仿真结果。本研究中考虑的对象由一个外壳组成，外壳上装有振动传感器，围绕着一个振动结构，使得它们在有限数量的点处耦合。声学数字孪生 (ADT) 用于模拟外部外壳的无缺陷状态。结合 ADT 的概念和基于伴随的高分辨率阵列处理方法，用于检测和定位被检测结构上的缺陷。
