| 激光激发瞬态Lamb波的实验检测与数值模拟 |
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| 引用本文： | 倪晓武,陈笑,许伯强,徐荣青,沈中华,陆建. 激光激发瞬态Lamb波的实验检测与数值模拟[J]. 南京理工大学学报(自然科学版), 2003, 27(5): 588-594 |
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| 作者姓名： | 倪晓武 陈笑 许伯强 徐荣青 沈中华 陆建 |
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| 作者单位： | 南京理工大学理学院,南京,210094 |
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| 基金项目： | 国家自然科学基金 (6 0 2 0 80 0 4 )，江苏省自然科学基金 (BK2 0 0 10 5 6 )，高等学校优秀青年教师教学科研奖励计划 |
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| 摘 要： | 为研究板材中Lamb波的产生和传播特性，该文提出了采用光纤耦合反射式光束偏转技术进行探测的方法，讨论了这一测试方法对应的原理。进而用有限元方法对激光融蚀机制下激发的Lamb波的演变过程进行了数值模拟。所获得的实验结果与数值计算波形图基本一致，证明该文所提出的测试方法在激光超声检测领域具有应用价值。
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| 关 键 词： | Lamb波 光偏转法 有限元法 融蚀模型 数值模拟 |
| 修稿时间： | 2003-01-18 |
Study of Laser-generated Transient Lamb Wave by Experiment and Numerical Simulation |
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| NiXiaowu ChenXiao XuBoqiang XuRongqing ShenZhonghua LuJian. Study of Laser-generated Transient Lamb Wave by Experiment and Numerical Simulation[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2003, 27(5): 588-594 |
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| Authors: | NiXiaowu ChenXiao XuBoqiang XuRongqing ShenZhonghua LuJian |
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| Abstract: | In order to study the generation and propagation characteristics of laser-generated Lamb wave in a solid plate, this paper presents the fiber-coupled optical deflection method to detect and to further discuss the detection principle in detail. Besides, based on the ablation model,the development of transient Lamb is simulated by the finite element method. The results of the numerical simulation are in good agreement with laser Lamb waveforms detected in experiment. This detection technique has a great potential in laser ultrasonic. |
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| Keywords: | Lamb wave optical deflection method finite element method ablation model |
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