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| Realization of the Viscoelastic Boundary Conditions Based on Wave Equations in Ansys Software |
| LIN Yi1,2, WANG Zhaoling1,3, LIU Zhengping1, NIU Dongxing2 |
1. Faculty of Geoscience and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Northwest Research Institute Co., Ltd. of CREC, Lanzhou 730000, China;
3. College of Civil Engineering, Sichuan Agricultural University, Chengdu 611830, China |
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Abstract: This paper researched boundary conditions of numerical simulation of seismic wave field in the application of finite element software Ansys. We propose a viscoelastic boundary conditions based on wave equation. Deduced from the wave equation and a viscoelastic boundary conditions theoretical foundation established, we selected damping Combin 14 unit as load finite element method, adopted APDL code successfully to apply viscoelastic boundary conditions in Ansys. The examples set up a virtual detector in the model boundaries, loaded Ricker wavelet source, extract wave field snapshot and time recording. Compared results demonstrate that viscoelastic boundary conditions imposed can well absorb boundary reflection, it shows the effectiveness of the viscoelastic model boundary conditions.
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Received: 21 April 2014
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2014, Vol. 32 
