| 基于超声导波技术对钢杆表面缺陷的无损检测研究 |
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| 引用本文： | 吴斌,李隆涛,王秀彦,于海群,李涌,何存富.基于超声导波技术对钢杆表面缺陷的无损检测研究[J].工程力学,2003,20(5):149-154. |
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| 作者姓名： | 吴斌 李隆涛 王秀彦 于海群 李涌 何存富 |
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| 作者单位： | 北京工业大学机电学院,北京,100022 |
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| 基金项目： | 国家自然科学基金(19972003)，北京市自然科学基金重点项目(3011001)，北京市自然科学基金(3992006)，教育部骨干教师资助计划，北京市教委科技合同项目资助项目(99010303) |
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| 摘 要： | 研究了圆柱钢杆内导波的传播及其频散特性。通过实验验证了杆中“直达纵波”这一现象并对其进行了分析,同时利用所建立的实验系统,对2320mm长圆柱钢杆表面的人工缺陷进行了检测。结果表明,在特定频率处,选择L(0,1)模态的超声导波检测钢杆中的缺陷是可行的。
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| 关 键 词： | 超声导波 频散 钢杆 无损检测 |
| 文章编号： | 1000-4750(2003)05-0149-06 |
NON-DESTRUCTIVE TEST OF A SURFACE DEFECT ON A STEEL BAR BASED ON ULTRASONIC GUIDED WAVE TECHNIQUES |
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| WU Bin,LI Long-tao,WANG Xiu-yan,YU Hai-qun,LI Yong,HE Cun-fu.NON-DESTRUCTIVE TEST OF A SURFACE DEFECT ON A STEEL BAR BASED ON ULTRASONIC GUIDED WAVE TECHNIQUES[J].Engineering Mechanics,2003,20(5):149-154. |
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| Authors: | WU Bin LI Long-tao WANG Xiu-yan YU Hai-qun LI Yong HE Cun-fu |
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| Abstract: | The multi-modes and disperse characteristics of guided waves in steel bar are investigated theoretically and experimentally. With experiments, the phenomena of 揕-Wave Precursor?is verified and analyzed. Meanwhile, an artificial surface defect of a 2320mm steel bar is detected. Results show that it is feasible for detecting the defects on a steel bar surface using L(0,1) mode of ultrasonic guided waves for a given special frequency. |
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| Keywords: | ultrasonic guided waves frequency disperse steel bar NDT |
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