| A method for visualizing sound propagation in solids and liquids |
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| 作者姓名： | 沈建国 张宏敏 |
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| 作者单位： | Tianjin University, Tianjin 300072, China |
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| 基金项目： | Tianjin University′s 985 Talent Plan, Key Project Science and Technology from Zhongyuan Oil Field and National Natural Science Foundation of China (50479070). |
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| 摘 要： | Introduction When seismic waves propagate in a medium of complex geometry,such as a dam,it pro-duces stress concentration area at some spots of the dam because of the interface reflection and refraction of the waves,resulting in serious safety risk.Understanding seismic wave propagation in complex mediums becomes very important.In order to reduce the damage from natural earth-quakes,precaution measures should be designed on the basis of the seismic propagation charac-teristics.Experimental geo…
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| 关 键 词： | 声学 地震 液体 固体 传播速度 震波 |
| 文章编号： | 1000-9116（2006）06-0670-07 |
| 收稿时间： | 2006-03-30 |
| 修稿时间： | 2006-10-24 |
A method for visualizing sound propagation in solids and liquids |
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| SHEN Jian-guo,ZHANG Hong-min.A method for visualizing sound propagation in solids and liquids[J].Acta Seismologica Sinica(English Edition),2006,19(6):670-676. |
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| Authors: | SHEN Jian-guo ZHANG Hong-min |
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| Institution: | Tianjin University, Tianjin 300072, China |
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| Abstract: | A new method for visualizing sound propagation in solids and liquids is described in this paper. The method can show the sound propagation process dynamically in two dimensions. Compared with Schlieren method and dynamic photo-elastic method, this method cannot only show the sound field distribution in liquid and solid at different time moments, but also can be applied to non-transparent solid. In addition, it does not strictly require small residual stress of the sample. The sample can, therefore, be easily made. Because the acoustic field is obtained by indirect measurements, the recording can be affected by the after-shock of the receiving sensor and is prone to the influence of the direct wave of the liquid. Putting an aluminum plate into a liquid, we recorded the compression wave, shear wave and surface wave in the aluminum and, in the liquid we also recorded the direct wave and three head waves, which are directly coupled with the compression wave, shear wave and surface wave respectively. The recording clearly depicts the coupling relationship of the sound waves through the interface between the aluminum and the liquid. Putting a plexiglass into a liquid, we also recorded the sound waves in the plexiglass and the coupling relationship between the sound waves in the two mediums. |
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| Keywords: | dynamic photoelastic technique Schlieren method sound wave visualization method |
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