Investigation of Lamb Waves Propagation by fibre-Coupling Optical Beam Deflection Detection Technique and Finite Element Method (Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics and Fluid Mechanics)
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概要
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Measurement of laser-generated transient Lamb waves propagation has been performed in 0.25 mm-thick iron plate by using a fibre sensor based on optical beam deflection technique. The detection principle of this optical method is discussed in detail. A high-powered Q-switched Nd : YAG laser was used to excite Lamb waves on the polished surface of iron plate. The well-defined Lamb waveforms, as well as their properties of oscillation and dispersion are presented in this paper. Furthermore, according to the ablation model, the development and propagation of Lamb waves are numerical simulated by the finite element method that has been widely used in laser ultrasonic field. The experimental results show good agreement with the numerical simulation. Therefore, this optical detection technique has considerable potential in ultrasonic field.
- 社団法人日本物理学会の論文
- 2004-02-15
著者
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Shen Zhong-hua
Department Of Applied Physics Nanjing University Of Science And Technology
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XU Rong-Qing
Department of Electronics & Information, East China Shipbuilding Institute
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CHEN Xiao
Department of Applied Physics, Nanjing University of Science & Technology
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LU Jian
Department of Applied Physics, Nanjing University of Science & Technology
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NI Xiao-Wu
Department of Applied Physics, Nanjing University of Science & Technology
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XU Bo-qiang
Department of Applied Physics, Nanjing University of Science and Technology
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Xu Rong-qing
Department Of Applied Physics Nanjing University Of Science And Technology
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Lu J
Univ. Sci. And Technol. Of China Anhui Chn
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Lu Jian
Department Of Applied Physics Nanjing University Of Science And Technology
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Ni Xiao-wu
Department Of Applied Physics Nanjing University Of Science And Technology
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Xu Bo-qiang
Department Of Applied Physics Nanjing University Of Science And Technology
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Chen Xiao
Department Of Applied Physics Nanjing University Of Science And Technology
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