Near-Field Beamforming Performance Analysis for Acoustic Emission Source Localization Based on Finite Element Simulation

摘要

This paper attempts to study the localization performance of a near-field acoustic emission (AE) beamforming method by changing some parameters, such as beamforming array types, localization velocity, and the sensors spacing. To investigate how those factors affect AE source localization accuracy, it's necessary to get the AE signals with high signal-noise ratio. The finite element method (FEM) is introduced to model the propagation of AE signal in a steel plate structure. The influences of some parameters on the resolution of AE source localization are discussed. The results provide a reference for the selection of parameters when the beamforming is used to identify AE source.