武汉工程大学学报Issue(10)：42-46,5.DOI:10.3969/j.issn.1674-2869.2014.010.009
超声波衍射时差法检测的有限元仿真
Ultrasonic time of flight diffraction detection by finite element simulation method
摘要
Abstract
Ultrasonic testing is a generally used nondestructive testing method, the results of which are abstract because the complex transmission path of ultrasonic contains a variety of noise signals, and the defect signals mixing with a large number of noises are difficult to be identified. We investigated the ul-trasonic mechanism of time of flight diffraction(TOFD) by finite element analysis for the better applica-tions of ultrasonic detection technology. Firstly, the welding steel with the artificial defects was detec-ted by TOFD method and the detection signals with the noise were extracted in experiments. Secondly, the propagation of ultrasound in artificial defect test block was simulated by ANSYS software and mo-reover the model of the finite element analysis was established to identify the defect diffraction signals accurately. Finally, the simulation results were compared with the experimental results, which showed the similarity of the values of simulation and actual detection. The research suggests that ultrasonic wave propagation simulation can be used for quantitative analysis and position to defects, which pro-vides reliable judgment basis for the actual test of complex conditions.关键词
超声波衍射时差法检测/有限元模拟/超声波仿真Key words
time of flight diffraction detection/finite element model/ultrasonic simulation分类
通用工业技术引用本文复制引用
陈汉新,杨诗琪,蔡洪涛,刘岑..超声波衍射时差法检测的有限元仿真[J].武汉工程大学学报,2014,(10):42-46,5.基金项目
国家自然科学基金项目 （）
