| 非金属固体中高斯光束热弹超声的方向性研究 |
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| 引用本文： | 吴亚平,是度芳.非金属固体中高斯光束热弹超声的方向性研究[J].应用科学学报,1998,16(1):68-73. |
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| 作者姓名： | 吴亚平 是度芳 |
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| 作者单位： | 华中理工大学 |
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| 摘 要： | 该文从理论上研究了非金属固体材料受高斯光束热弹激励时所产生的超声波的方向性，通过积分变换法求解热弹性运动方程，推导出远场区中的位移解析表达式，给出了纵波和横波的方向性图案，讨论了材料的光吸收系数对声源方向性的影响，并与实验结果进行了比较。
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| 关 键 词： | 激光超声 方向性 非金属固体材料 热弹性 |
Study on the Directivity of Gauss Beam Generated Thermoelastic Ultrasound in NonMetallic Solids |
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| WU YAPING,SHI DUFANG,HE YULONG.Study on the Directivity of Gauss Beam Generated Thermoelastic Ultrasound in NonMetallic Solids[J].Journal of Applied Sciences,1998,16(1):68-73. |
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| Authors: | WU YAPING SHI DUFANG HE YULONG |
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| Institution: | Huazhong University of Science and Technology Wuhan 430074 |
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| Abstract: | The directivity of Gauss beam generated ultrasound in nonmetallic solids are stutied theoretically. We solve the thermoelastic wave equations by means of the integral transform mathod and obtain analytic expressions of the wave displacements in the farfield. We also present directivity patterns of both longitudinal and shear waves, discuss the effects of optical absorption coefficient on the diretivity of the ultrasound waves and compare them with the experimental results. |
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| Keywords: | laser generated ultrasond directivty relative optical absorption coefficient |
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