| 裂纹超声散射的有限元模拟 |
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| 引用本文： | 李树榜,李书光,刘学锋.裂纹超声散射的有限元模拟[J].无损检测,2007,29(1):27-31,55. |
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| 作者姓名： | 李树榜 李书光 刘学锋 |
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| 作者单位： | 1. 中国石油大学(华东)物理科学与技术学院,山东东营,257061;聊城大学,计算机科学学院,山东聊城,252059
2. 中国石油大学(华东)物理科学与技术学院,山东东营,257061 |
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| 摘 要： | 建立了无限长板的具有吸收边界的二维平面应变有限元模型,在研究了脉冲超声波在无限长板中传播的基础上,对板中平行于表面的裂纹、与表面成45°的斜裂纹和四分之一圆周弧形裂纹三种情况的脉冲超声波散射进行了重点研究。通过对纵横波的分离和在全波场中对散射波的分离,清晰地显示了裂纹对脉冲超声波的散射和复杂的模式转换。模拟结果以波场快照和A扫描曲线形式给出。
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| 关 键 词： | 超声检测 裂纹 散射 有限元模拟 |
| 文章编号： | 1000-6656（2007）01-0027-05 |
| 收稿时间： | 2006-01-24 |
| 修稿时间： | 2006-01-24 |
Finite Element Modeling of Ultrasonic Wave Scattering on Cracks |
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| LI Shu-bang,LI Shu-guang,LIU Xue-feng.Finite Element Modeling of Ultrasonic Wave Scattering on Cracks[J].Nondestructive Testing,2007,29(1):27-31,55. |
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| Authors: | LI Shu-bang LI Shu-guang LIU Xue-feng |
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| Abstract: | A two-dimensional plain strain finite element model of infinite plate is developed to investigate the ultrasonic wave propagation and scattering on three kinds of cracks: parallel to the surface,450 oblique angle to the surface,and quarter-circle.In order to show the scattering and complex modeconversion clearly,the total field is decomposed into longitudinal and transverse parts and the scattered field is obtained by subtracting incident wave from the total field.The results are presented in the form of snapshots and A-scan plots. |
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| Keywords: | Ultrasonic testing Cracks Scattering Finite element modeling |
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