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http://dx.doi.org/10.7734/COSEIK.2021.34.6.427

Practical Numerical Model for Wave Propagation and Fluid-Structure Interaction in Infinite Fluid  

Cho, Jeong-Rae (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Han, Seong-Wook (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Lee, Jin Ho (Department of Ocean Engineering, Pukyong National University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.34, no.6, 2021 , pp. 427-435 More about this Journal
Abstract
An analysis considering the fluid-structure interaction is required to strictly evaluate the seismic behavior of facilities such as, environmental facilities and dams, that store fluids. Specifically, in the case of an infinite domain in the upstream direction, such as a dam-reservoir system, this should be carefully considered. In this study, we proposed a practical numerical model for both wave propagation and fluid-structure interaction analyses of an infinite domain, for a system with a semi-infinite domain such as a dam-reservoir system. This method was applicable to the time domain, and enabled accurate boundary analysis. For an infinite fluid domain, a small number of mid-point integrated acoustic finite elements were applied instead of a general acoustic finite element, and a viscous boundary was imposed on the outermost boundary. The validity and accuracy of the proposed method were secured by comparing analytic solutions of a reservoir having infinite domain, with the parametric analysis results, for the number of elements and the size of the modeling region. Furthermore, the proposed method was compared with other fluid-structure interaction methods using additional mass.
Keywords
environmental facility; dam; infinite domain; fluid-structure interaction; wave propagation analysis; seismic response;
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