Lamb波频散特性和波结构特性的有限元仿真

摘要

采用ANSYS有限元仿真软件模拟超声Lamb波在4 mm厚的钢板结构中的传播过程,计算S0模态和A0模态超声Lamb波的群速度和沿钢板厚度方向上的位移波结构,绘制频散曲线和波结构特性曲线,理论分析与仿真结果基本吻合;为超声Lamb波群速度测定和缺陷检测提供理论依据.%The propagation process of A0 and S0 mode wave in 4 mm steel plate was simulated in finite element simulation software ANSYS,and group velocity curves and wave structure characteristic curves of S0 and A0 Lamb waves in steel plate were plotted.Simulation results are approximately agreed with the theoretical analysis.It provides theoretical basis for group velocity measurement and defect detection.