摘要
从有限元基本原理出发,建立固体中二维有限元模型。对含有孔洞缺陷模型的声波散射进行了数值模拟研究,通过波场快照图能清晰显示孔洞对超声波传播的影响,对时域A-扫描曲线上透射波到达时间进行计算,验证了结果的正确性。重点对透射波进行了频谱分析,通过频域特征量和敏感频率可以识别出不同尺寸的孔洞。
Based on the principle of the finite element method, a two-dimensional finite element model with a hole is studied by simulation. The snapshots display the effect to ultrasonic propagation by a hole, and the accuracy of results is confirmed by the A-scan curves. With the characteristics of frequency and the sensitivity frequency obtained from the spectral analysis of the transmission information, we can recognize the different size of holes.
出处
《无损检测》
2009年第1期72-75,共4页
Nondestructive Testing
关键词
有限元模拟
孔洞
频谱分析
敏感频率
Finite element simulation
Holes
Spectrum analysis
Sensitivity frequency
