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A Study on Improving the Capacity of Absorbing Boundary Using Dashpot  

Kim, Hee-Seok (한양대학교 토목공학과)
Lee, Jong-Seh (한양대학교 토목공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.20, no.5, 2007 , pp. 629-640 More about this Journal
Abstract
In this paper an analytical study is carried out to improve the capacity of absorbing boundary using dashpot, one of the most widely used absorbing boundaries in FEM. Using 2-D harmonic plane wave equation, absorbing boundary condition is modified to maximize its capacity according to the incident angle. Validity of the absorbing boundary conditions which is modified is investigated by adopting the solution of Miller and Pursey. The Miller and Pursey's problem is then numerically simulated using the finite element method. The absorption ratios are calculated by comparing the displacements at the absorbing boundary to those at the free field without the absorbing boundary. The numerical study is carried out through comparison of displacement at the interior region and the boundary of the numerical model.
Keywords
dashpot; absorbing boundary; Miller and Pursey's problem; absorption ratios;
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Times Cited By KSCI : 1  (Citation Analysis)
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