基于磁致伸缩效应的超声应力波传感器设计与优化

Design and optimization of an ultrasonic stress wave sensor based on magnetostrictive effect

应用超声应力波对结构损伤进行快速准确地检测是结构健康监测领域的一种新兴技术。近年来,一种利用铁磁性材料的磁致伸缩特性激励和接收超声应力波的磁致伸缩传感器,凭借其结构简单、价格低廉、非接触性等优点,受到了广泛关注。本文基于铁磁性材料的磁致伸缩特性,提出一种用于非铁磁性板结构损伤检测的SH0型磁致伸缩传感器,理论和实验研究表明了该传感器设计的可行性及实用性。在此基础上,运用ANSYS软件优化磁致伸缩传感器设计,从而提高传感器功效,并通过实验验证优化结果。

Guided wave inspection is an emerging technology for rapidly detecting structural damage in structural health monitoring （SHM） field. Recently, a guided wave sensor based on magnetostrcition has received much attention because of several advantages such as simple structure, cost-effectiveness and potential non-contact detection. In this paper, based on the magnetostrictive effect of ferromagnetic materials, a magnetostrictive sensor （MsS） for generating and detecting non-dispersive shear horizontal （SH0） wave in a non-ferromagnetic plate structure is proposed. The feasibility and effectiveness of the proposed magnetostrictive sensor is demonstrated both in theory and experiments. Finally, optimum design of the sensor is carried out using ANSYS software, and the performance and effectiveness of the sensor are proved by experiments.