| 引用本文: | 郑荣跃,刘干斌,唐国金.饱和多孔热弹体界面SV波反射的松弛效应.[J].国防科技大学学报,2014,36(2):1-6.[点击复制] |
| ZHENG Rongyue,LIU Ganbin,TANG Guojin.Relaxation effects of reflection of SV waves at surface of saturated porous thermoelasticity[J].Journal of National University of Defense Technology,2014,36(2):1-6[点击复制] |
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| 饱和多孔热弹体界面SV波反射的松弛效应 |
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(1.国防科技大学 航天科学与工程学院，湖南 长沙 410073;2.宁波大学 岩土工程研究所, 浙江 宁波 315211)
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| 摘要: |
| 在Biot波动理论及饱和多孔热弹性波动理论基础上，引入三个松弛因子，建立了广义饱和多孔热弹性波动理论。通过对SV波在界面上的反射问题进行分析，得到了p1、p2、T及S波反射系数表达式，并利用算例对比分析了基于广义饱和多孔热弹性波动理论(G-TE)与L-S、G-L热弹性波动理论的SV波界面上反射系数的差异，讨论了松弛因子对反射系数的影响。结果表明：G-TE理论、L-S理论、G-L理论模型对p1、p2、S波反射幅值计算结果有较大的影响，且影响规律各不相同。松弛因子对p2波的影响较大，对p1波和S波的影响较小。 |
| 关键词: 饱和多孔介质 热弹性体 SV波 反射 松弛效应 |
| DOI：10.11887/j.cn.201402001 |
| 投稿日期：2013-10-28 |
| 基金项目:国家自然科学基金资助项目（51278256，51178227） |
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| Relaxation effects of reflection of SV waves at surface of saturated porous thermoelasticity |
| ZHENG Rongyue1,2, LIU Ganbin3, TANG Guojin1 |
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(1.College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.
2.Institute of Geotechnical Engineering，Ningbo University, Ningbo 315211, China;3.2.Institute of Geotechnical Engineering，Ningbo University, Ningbo 315211, China)
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| Abstract: |
| Based on the Biot’s wave theory and thermoelastic theory for saturated porous medium, three relaxation factors were introduced and the generalized thermoelastic theory for saturated porous medium was developed. Reflection of SV waves on the surface of the plane was used to analyze the influence of relaxation effect on the reflection, and the expressions of the reflection coefficient for the p1 wave, p2 wave, T-wave and S-wave were derived. Numerical results were obtained and used to discuss the difference of reflection amplitude for four kinds of reflection waves among the generalized thermoelastic theory G-TE, L-S theory, and G-L theory. The effect of the relaxation time factors was also discussed. It is indicated that there is apparent effect of G-TE, L-S theory, and G-L theory on the results and it is different from p1 wave,p2 wave and S-wave. In addition, there is greater effect of relaxation time on p2 wave, and less effect on p1 wave, and the effect can be omitted on the S wave. |
| Keywords: saturated porous medium thermo-elasticity SV wave reflection relaxation effect |
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