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http://dx.doi.org/10.12989/csm.2018.7.3.353

Application of Wavenumber-TD approach for time harmonic analysis of concrete arch dam-reservoir systems  

Lotfi, Vahid (Department of Civil and Environmental Engineering, Amirkabir University of Technology)
Zenz, Gerald (Institute of Hydraulic Engineering and Water Resources Management, Department of Civil Engineering, Graz University of Technology)
Publication Information
Coupled systems mechanics / v.7, no.3, 2018 , pp. 353-371 More about this Journal
Abstract
The Wavenumber or more accurately Wavenumber-FD approach was initially introduced for two-dimensional dynamic analysis of concrete gravity dam-reservoir systems. The technique was formulated in the context of pure finite element programming in frequency domain. Later on, a variation of the method was proposed which was referred to as Wavenumber-TD approach suitable for time domain type of analysis. Recently, it is also shown that Wavenumber-FD approach may be applied for three-dimensional dynamic analysis of concrete arch dam-reservoir systems. In the present study, application of its variation (i.e., Wavenumber-TD approach) is investigated for three-dimensional problems. The method is initially described. Subsequently, the response of idealized Morrow Point arch dam-reservoir system is obtained by this method and its special cases (i.e., two other well-known absorbing conditions) for time harmonic excitation in stream direction. All results for various considered cases are compared against the exact response for models with different values of normalized reservoir length and reservoir base/sidewalls absorptive conditions.
Keywords
concrete arch dams; wavenumber; absorbing boundary conditions; truncation boundary;
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Times Cited By KSCI : 3  (Citation Analysis)
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