Journal
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
Volume 152, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.soildyn.2021.107054
Keywords
Numerical simulation; Viscoelastic; Perfectly matched layer; Time-domain finite element method; Elastodynamic problems
Funding
- National Natural Science Foundation of China [52027814, 51839009]
- Fundamental Research Funds for the Central Universities [2042021kf0057]
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A novel element and method are proposed in this paper, applying PML theory in FEM and combining with viscoelastic model and Newmark algorithm to efficiently absorb outgoing waves.
For the numerical simulation of infinite domain problems in finite element method (FEM), unwanted reflection from the artificial boundaries of the model is a limiting factor. Therefore, in this paper, based on the theory of perfectly matched layer (PML), a novel element is derived to deal with absorbing boundary conditions in the framework of time-domain finite element method (TDFEM). Then, by combining with the viscoelastic model and modified Newmark algorithm, a novel method is proposed to absorb outgoing waves in unbounded domains. Numerical results show that the proposed method can efficiently absorb the elastic wave, and it can be employed to solve infinite domain problems.
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