基于Lamb波的损伤铝板信号获取仿真研究  

Signal Obtaining Simulation of Damaged Aluminum Plate Based on Lamb Wave

作　　者：朱佳驹 丰世林[1] 聂瑞 左都全 ZHU Jiaju;FENG Shilin;NIE Rui;ZUO Duquan(School of Aviatopm Engineering,Civil Aviation Flight Universoty of China,Guanghan 618300,China)

机构地区：[1]中国民用航空飞行学院航空工程学院,四川广汉618300

出　　处：《西安航空学院学报》2024年第1期59-65,共7页Journal of Xi’an Aeronautical Institute

基　　金：四川省科技计划资助项目(2023YFG0165,2023NSFSC0372);中央高校基本科研业务费专项资金资助项目(J2023-028)。

摘　　要：为了分析Lamb波在健康铝板和通孔铝板上的传播规律,提出基于Lamb波的损伤信号获取仿真方法。首先绘制3 mm铝板的群速度和相速度频散曲线,然后调制激励信号,在有限元软件Abaqus中建模仿真,获得Lamb波在铝板上的信号,最后再将各信号带入损伤因子公式中计算SDC值。研究结果表明:距离激励点的位置越远,Lamb波衰减的越厉害;相同位置,接收到完整板的信号幅值大于损伤板;传感器距离损伤位置越近,损伤因子越大。研究结果为无损检测成像技术提供理论支持。In order to analyze the propagation law of Lamb wave on aluminum plate and in good condition through-hole aluminum plate,a simulation method of damage signal acquisition based on Lamb wave is proposed.Firstly,the group velocity and phase velocity dispersion curves of 3mm aluminum plate are drawn,then the excitation signals are modulated,and the Lamb wave signals on aluminum plate are obtained by modeling and simulation in the finite element software Abaqus.Finally,each signal is brought into the damage factor formula to calculate the SDC value.The results show that the greater the distance from the excitation point,the greater the attenuation of Lamb wave.At the same position,the amplitude of the signal received from the intact plate is lar-ger than that of the damaged plate.The closer the sensor is to the damage location,the greater the damage factor.The research results provide theoretical support for non-destructive testing imaging technology.

关 键 词：无损检测 LAMB波 铝板 损伤因子 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TB302.5[金属学及工艺—金属材料]