Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model
The fractional-order differential operator describes history dependence and global correlation. In this paper, we use this trait to describe the viscoelastic characteristics of the solid skeleton of a viscoelastic two-phasic porous material. Combining Kjartansson constant Q fractional order theory w...
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MDPI AG
2022-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/3/1020 |
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| author | Ning Hu Maofa Wang Baochun Qiu Yuanhong Tao |
| author_facet | Ning Hu Maofa Wang Baochun Qiu Yuanhong Tao |
| author_sort | Ning Hu |
| collection | DOAJ |
| description | The fractional-order differential operator describes history dependence and global correlation. In this paper, we use this trait to describe the viscoelastic characteristics of the solid skeleton of a viscoelastic two-phasic porous material. Combining Kjartansson constant Q fractional order theory with the BISQ theory, a new BISQ model is proposed to simulate elastic wave propagation in a viscoelastic two-phasic porous material. The corresponding time-domain wave propagation equations are derived, and then the elastic waves are numerically simulated in different cases. The integer-order derivatives are discretised using higher-order staggered-grid finite differences, and the fractional-order time derivatives are discretised using short-time memory central differences. Numerical simulations and analysis of the wave field characterisation in different phase boundaries, different quality factor groups, and multilayered materials containing buried bodies are carried out. The simulation results show that it is feasible to combine the constant Q fractional-order derivative theory with the BISQ theory to simulate elastic waves in viscoelastic two-phasic porous materials. The combination can better describe the viscoelastic characteristics of the viscoelastic two-phasic porous materials, which is of great significance for further understanding the propagation mechanism of elastic waves in viscoelastic two-phasic porous materials and viscoelastic two-phasic porous materials containing buried bodies. This paper provides a theoretical forward simulation for fine inversion and reconstruction of layer information and buried body structure in viscoelastic two-phasic porous materials. |
| first_indexed | 2024-03-09T23:36:27Z |
| format | Article |
| id | doaj.art-cf831fc2e55e4a8f8b3301e460db7df2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:36:27Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-cf831fc2e55e4a8f8b3301e460db7df22023-11-23T17:00:57ZengMDPI AGMaterials1996-19442022-01-01153102010.3390/ma15031020Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ ModelNing Hu0Maofa Wang1Baochun Qiu2Yuanhong Tao3Marine Technology and Equipment Research Center, Hangzhou Dianzi University, Hangzhou 310018, ChinaMarine Technology and Equipment Research Center, Hangzhou Dianzi University, Hangzhou 310018, ChinaMarine Technology and Equipment Research Center, Hangzhou Dianzi University, Hangzhou 310018, ChinaSchool of Sciences, Zhejiang University of Science and Technology, Hangzhou 310023, ChinaThe fractional-order differential operator describes history dependence and global correlation. In this paper, we use this trait to describe the viscoelastic characteristics of the solid skeleton of a viscoelastic two-phasic porous material. Combining Kjartansson constant Q fractional order theory with the BISQ theory, a new BISQ model is proposed to simulate elastic wave propagation in a viscoelastic two-phasic porous material. The corresponding time-domain wave propagation equations are derived, and then the elastic waves are numerically simulated in different cases. The integer-order derivatives are discretised using higher-order staggered-grid finite differences, and the fractional-order time derivatives are discretised using short-time memory central differences. Numerical simulations and analysis of the wave field characterisation in different phase boundaries, different quality factor groups, and multilayered materials containing buried bodies are carried out. The simulation results show that it is feasible to combine the constant Q fractional-order derivative theory with the BISQ theory to simulate elastic waves in viscoelastic two-phasic porous materials. The combination can better describe the viscoelastic characteristics of the viscoelastic two-phasic porous materials, which is of great significance for further understanding the propagation mechanism of elastic waves in viscoelastic two-phasic porous materials and viscoelastic two-phasic porous materials containing buried bodies. This paper provides a theoretical forward simulation for fine inversion and reconstruction of layer information and buried body structure in viscoelastic two-phasic porous materials.https://www.mdpi.com/1996-1944/15/3/1020constant Q fractional-order derivativeviscoelastic two-phasic porous materialsBISQ modelnumerical simulationelastic wave field |
| spellingShingle | Ning Hu Maofa Wang Baochun Qiu Yuanhong Tao Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model Materials constant Q fractional-order derivative viscoelastic two-phasic porous materials BISQ model numerical simulation elastic wave field |
| title | Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model |
| title_full | Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model |
| title_fullStr | Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model |
| title_full_unstemmed | Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model |
| title_short | Numerical Simulation of Elastic Wave Field in Viscoelastic Two-Phasic Porous Materials Based on Constant Q Fractional-Order BISQ Model |
| title_sort | numerical simulation of elastic wave field in viscoelastic two phasic porous materials based on constant q fractional order bisq model |
| topic | constant Q fractional-order derivative viscoelastic two-phasic porous materials BISQ model numerical simulation elastic wave field |
| url | https://www.mdpi.com/1996-1944/15/3/1020 |
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