Bulk and Rayleigh Waves Propagation in Three-Phase Soil with Flow-Independent Viscosity

被引：2
|
作者：
Guo, Qing [1 ,2 ]
Liu, Hongbo [1 ,2 ]
Dai, Guoliang [1 ,2 ]
Li, Zhongwei [1 ,2 ]
机构：
[1] Southeast Univ, Sch Civil Engn, Nanjing 210096, Peoples R China
[2] Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing 210096, Peoples R China
来源：
APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 14期
基金：
中国国家自然科学基金;
关键词：
bulk wave; Rayleigh wave; viscoelasticity; unsaturated soil; wave speed; attenuation coefficient; DYNAMIC-RESPONSE; HYDRAULIC CONDUCTIVITY; ELASTIC WAVES; POROUS-MEDIA; ATTENUATION; BEHAVIOR; MODEL;
D O I：
10.3390/app12147166
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The flow-independent viscosity of the soil skeleton has significant influence on the elastic wave propagation in soils. This work studied the bulk and Rayleigh waves propagation in three-phase viscoelastic soil by considering the contribution of the flow-independent viscosity from the soil skeleton. Firstly, the viscoelastic dynamic equations of three-phase unsaturated soil are developed with theoretical derivation. Secondly, the explicit characteristic equations of bulk and Rayleigh waves in three-phase viscoelastic soil are yielded theoretically by implementing Helmholtz resolution for the displacement vectors. Finally, the variations of the motion behavior for bulk and Rayleigh waves with physical parameters such as relaxation time, saturation, frequency, and intrinsic permeability are discussed by utilizing calculation examples and parametric analysis. The results reveal that the influence of soil flow-independent viscosity on the wave speed and attenuation coefficient of bulk and Rayleigh waves is significantly related to physical parameters such as saturation, intrinsic permeability, and frequency.
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页数：16
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