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author:

Zhao, Yun (Zhao, Yun.) [1] | Shi, Ya-bo (Shi, Ya-bo.) [2] | Chen, Zhang-long (Chen, Zhang-long.) [3] | Hu, Jing (Hu, Jing.) [4] (Scholars:胡静) | Xu, Ping (Xu, Ping.) [5] | Shan, Zhen-dong (Shan, Zhen-dong.) [6]

Indexed by:

SCIE

Abstract:

The Laplace transform method is widely used for solving viscoelastic dynamic problems. However, the numerical inversion process of this method suffers from instability, especially for long-duration response issues. Moreover, the solutions obtained via the Laplace transform method are often semi-analytical. In this study, addressing the one-dimensional transient response problem of unsaturated viscoelastic porous media, an analytical solution is proposed based on the finite Fourier transform method. First, leveraging the symmetry of the problem, the solution of a typical stress-displacement boundary problem is transformed into the solution of a stress-stress boundary problem. Second, by applying finite Fourier sine and cosine transforms, the original second-order viscoelastic partial differential governing equations are transformed into a system of first-order ordinary differential equations in the frequency domain for solution, and the analytical solution in the frequency domain is provided using the state-space method. Finally, the finite Fourier inverse transform method is used to present the analytical solution in series form for the original problem in the time domain. The accuracy of the proposed method is validated through comparison with the Laplace solution method and existing elastic solution results. The analysis of numerical examples shows that the damping coefficient has a significant influence on the wave velocity. As the damping coefficient increases, the wave phase generally tends to decrease. With the increase in saturation , the velocities of and waves increase, while the velocity of the wave decreases.

Keyword:

analytical solution finite Fourier transform method transient response unsaturated porous medium viscoelastic

Community:

  • [ 1 ] [Zhao, Yun]Henan Univ Technol, Coll Civil Engn & Architecture, Zhengzhou, Peoples R China
  • [ 2 ] [Shi, Ya-bo]Henan Univ Technol, Coll Civil Engn & Architecture, Zhengzhou, Peoples R China
  • [ 3 ] [Chen, Zhang-long]Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing, Peoples R China
  • [ 4 ] [Hu, Jing]Fuzhou Univ, Fuzhou, Peoples R China
  • [ 5 ] [Xu, Ping]Zhengzhou Univ, Sch Water Conservancy & Transportat, Zhengzhou, Peoples R China
  • [ 6 ] [Shan, Zhen-dong]China Earthquake Adm, Inst Engn Mech, Harbin, Peoples R China

Reprint 's Address:

  • [Zhao, Yun]Henan Univ Technol, Coll Civil Engn & Architecture, Zhengzhou, Peoples R China

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Source :

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS

ISSN: 0363-9061

Year: 2025

3 . 4 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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