| 兰姆波频散曲线的绘制与试验验证 |
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| 引用本文： | 曹正敏,林莉,李喜孟. 兰姆波频散曲线的绘制与试验验证[J]. 理化检验(物理分册), 2008, 44(9): 482-484,500 |
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| 作者姓名： | 曹正敏 林莉 李喜孟 |
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| 作者单位： | 大连理工大学无损检测研究所,大连116024 |
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| 摘 要： | 基于频散曲线实质上是频散方程实数解分布图的特点，提出了频散曲线的简易绘制方法，并采用2．5MHz可变角探头在厚度为1．29mm的铝板上进行了试验验证，通过比较群速度、相速度和激发角的理论计算和试验结果，以及进行误差分析可知，此法具有良好的实用性。
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| 关 键 词： | 兰姆波 频散方程 频散曲线 铝板 |
PLOTTING AND EXPERIMENTAL VALIDATION OF LAMB WAVE DISPERSION CURVE |
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| CAO Zheng-min,LIN Li,LI Xi-meng. PLOTTING AND EXPERIMENTAL VALIDATION OF LAMB WAVE DISPERSION CURVE[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2008, 44(9): 482-484,500 |
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| Authors: | CAO Zheng-min LIN Li LI Xi-meng |
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| Affiliation: | (Nondestructive Testing ＆ Evaluation Laboratory, Dalian University of Technology,Dalian 116024, China) |
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| Abstract: | A simple method of plotting the dispersion curve is proposed according to the character which dispersion curve is the real solution of dispersion function in essence. The reliability of the method was proved by the experiment which carried out on an aluminum plate of a thickness of 1.29 mm using a variable-angle probe of 2. 5 MHz. The method was suitable for practical application by comparing the theoretical with experimental value of phase velocity, group velocity and excitation angle, and error analysis. |
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| Keywords: | Lamb wave dispersion curve dispersion equation aluminium plate |
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