| 金属材料内部非金属夹杂超声检测的数值模拟 |
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| 作者姓名： | 陈丹 肖会芳 黎敏 王善超 徐金梧 |
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| 作者单位： | 1. 北京科技大学机械工程学院, 北京 100083; |
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| 基金项目： | “十二五”国家科技支撑计划资助项目(2012BAF04B02)北京高等学校青年英才计划资助项目(YETP0373) |
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| 摘 要： | 在金属材料内部夹杂物的超声检测中,如何通过检测获得的回波信号辨识夹杂物的属性和位置,一直是其重点和难点问题.通过建立包含夹杂物缺陷的二维金属板模型,采用有限元数值模拟的方法,对材料内部超声波场进行计算,获得了两种最典型的夹杂物Al2O3和TiN,以及二者在材料内部不同深度时的超声回波信号.研究了夹杂物类型和夹杂物深度对超声回波时域波形以及对界面波、夹杂物缺陷回波和底面回波频谱分布的影响规律.
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| 关 键 词： | 金属材料 非金属夹杂物 超声检测 数值模拟 频谱分析 |
| 收稿时间： | 2014-04-20 |
Numerical simulation of ultrasonic testing for non-metallic inclusions in metallic materials |
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| Affiliation: | 1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083 |
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| Abstract: | In the area of internal inclusion detection using ultrasonic,identifying the location and type of internal inclusions using the collected back echo signals has always been a difficult problem. A two-dimensional metallic plate containing inclusions is established. Ultrasonic wave fields inside this material are calculated by the finite element method. Echo waves for two typical inclusions of Al2O3 and TiN and for these inclusions with different depths are obtained. The influences of the type and depth of inclusions on the time-domain and the spectral distribution of interfacial waves,echo waves of inclusions and bottom echo waves are analyzed especially. |
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