Improving the performance of absorbing layers with increasing damping in the numerical modeling of surface waves propagation using finite element method

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Mirasi Sohrab; Rahnema Hossein

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Journal: ENGINEERING GEOLOGY Year:2020 | Volume:13 | Issue:2 Page(s): 13-26

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Information Journal Paper

Title

Improving the performance of absorbing layers with increasing damping in the numerical modeling of surface waves propagation using finite element method

Author(s)

Mirasi Sohrab | Rahnema Hossein | Issue Writer Certificate

Keywords

Reflected wavesQ1

ALIDQ1

Absorbing Layers using Increasing DampingQ1

Absorbing boundaryQ1

Finite ElementQ1

Abstract

Finite Element codes (FE) are increasingly used to simulate the propagation of elastic waves and dispersion, especially in surface-wave techniques. The common problem when using such methods is unwanted reflections from the boundaries of the model, which is still a challenging issue. In this paper, the effect of different parameters is evaluated to improve the performance of Absorbing Layers using Increasing Damping (ALID) in order to reduce the Reflected waves from the boundaries and increase the resolution of the results. In this regard, after identifying the appropriate specifications of ALID layers in Abaqus software, the effect of thickness and number of ALID layers in different soils media with shear wave velocities of 200, 800 and 2000 m / s are investigated on the amplitude damping of incident waves at the boundaries. The results show that applying ALID with the gradual increasing damping significantly prevents the reflection of the waves into the media in comparison with the constant and double increasing damping. Furthermore, the hard soil requires more ALID layers and soft soil including high damping needs lower ALID layers. also increasing the number of ALID layers are more effective than increasing their thickness.

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APA: Copy

Mirasi, Sohrab, & Rahnema, Hossein. (2020). Improving the performance of absorbing layers with increasing damping in the numerical modeling of surface waves propagation using finite element method. ENGINEERING GEOLOGY, 13(2 ), 13-26. SID. https://sid.ir/paper/384953/en

Vancouver: Copy

Mirasi Sohrab, Rahnema Hossein. Improving the performance of absorbing layers with increasing damping in the numerical modeling of surface waves propagation using finite element method. ENGINEERING GEOLOGY[Internet]. 2020;13(2 ):13-26. Available from: https://sid.ir/paper/384953/en

IEEE: Copy

Sohrab Mirasi, and Hossein Rahnema, “Improving the performance of absorbing layers with increasing damping in the numerical modeling of surface waves propagation using finite element method,” ENGINEERING GEOLOGY, vol. 13, no. 2 , pp. 13–26, 2020, [Online]. Available: https://sid.ir/paper/384953/en

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