三相非饱和土参数对波的传播的影响研究

发布时间：2018-05-03 09:57

本文选题：非饱和土 + 波传播　；参考：《岩土力学》2015年S2期

【摘要】：基于已建立的非饱和土中的波动方程,导出4种体波的波速以及衰减的解析表达式。数值分析了4种体波的波速、衰减与孔隙率以及Lame常数λ、μ之间的关系。结果表明,随孔隙率的增大,P1波和S波的波速有所提高,P2波和P3波的波速随孔隙率的增大而有所减小;3种P波的衰减有所增大,其中以P3波变化最为显著。P1波、P3波和S波的波速基本上不随Lame常数λ变化,P2波的波速随Lame常数λ的增大而稍有增大。P2及S波的衰减基本不随Lame常数λ变化,P1、P3波的衰减随Lame常数λ的增大而有所减小。3种P波的波速基本上不随Lame常数μ变化,S波的波速随Lame常数μ的增大而有所增大。P2及S波的衰减基本不随Lame常数μ变化,P1、P3波的衰减随Lame常数μ的增大而有所减小,其中P3波的变化最为显著。
[Abstract]:Based on the established wave equation in unsaturated soil, the analytical expressions of wave velocity and attenuation of four kinds of bulk waves are derived. The relationship between wave velocity, attenuation and porosity, Lame constant 位, 渭 of four kinds of bulk waves is analyzed numerically. The results show that with the increase of porosity, the wave velocities of P 1 wave and S wave increase with the increase of porosity, and the wave velocity of P 2 wave and P 3 wave decrease with the increase of porosity, and the attenuation of three P waves increases. Among them, P3 wave has the most obvious variation. P1 wave, P3 wave and S wave basically have no change with Lame constant 位. The velocity of P2 wave increases slightly with the increase of Lame constant 位 .P2 and the attenuation of S wave basically do not change with Lame constant 位. Attenuation decreases with the increase of Lame constant 位. 3 the wave velocity of P wave basically does not change with Lame constant 渭. The wave velocity of S wave increases with the increase of Lame constant 渭. P2 and S wave attenuation basically do not change with Lame constant 渭 The attenuation decreases with the increase of the Lame constant 渭. The change of P3 wave is the most obvious.
【作者单位】：华东交通大学土木建筑学院;浙江大学滨海和城市岩土工程研究中心;杭州市城东新城建设投资有限公司;
【基金】：国家自然科学基金(No.51338009) 江西省2011协同创新中心项目资助(2011年)
【分类号】：TU435

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