金属薄板缺陷的超声多途Lamb波检测

Ultrasonic Mutipath Lamb Wave Detection of Sheet Metal Defects

金属薄板在动车等现代化设计中应用广泛,其是否存在缺陷等检测具有很重要的意义;为此,利用超声多途提供的额外数据来检测金属薄板的缺陷,提出相应的算法,多途路径在直接反射的路径上是可以预测和识别的,直接反射路径是相对比较容易识别的;同时利用ANSYS有限元建模不同的薄板缺陷模型,在不同的传感器位置、缺陷位置、缺陷大小情况下分别进行仿真;通过ANSYS仿真和实验检测都得出了良好的结果,误差在可控制范围之内,证明了超声多途应用与金属薄板Lamb波检测的是可行的;仿真和实验表明超声多途通过实际和多途虚拟扩展的传感器数据的分析证明了超声多途能够对薄板缺陷进行定位并检测其大小;提出的超声多途检测方法,通过单次测量即可检测出薄板缺陷的位置和大小,具有良好的检测性能。

Sheet metal in the moving car is widely used in modern design, such as detection of defects has very important significance. For this purpose, the use of ultrasound of multiplicity provide additional data to detect the defects of sheet metal, and the algorithm of multiplicity is predictable path in the direct reflection of the path and identify, directly reflect the path is relatively easy to identify. Using ANSYS finite element modeling different sheet defect model at the same time, the different sensor location, defect location, defect size cases are simulated respectively. Obtained by ANSYS simulation and experimental tests are good results, the error in the range of controlled, proved thai the ultrasonic application of multiplicity and sheet metal Lamb wave detection is feasible; Simulation and experiments show that uhrasonic way through actual and virtual extension of multiplicity of sensor data analysis proved that the ultrasonic multiplicity can for detecting shect to locate defects and their size. Ultrasound of multiplicity of detection method is put forward, through a single measurement can detect the defect size and location of the plate, has good detection performance.