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《Chinese Journal of Geophysics》 2013-12

## The direct coupled model for dam-reservoir dynamic interaction analysis based on high-order doubly asymptotic open boundary

GAO Yi-Chao;XU Yan-Jie;JIN Feng;WANG Xiang;State Key Laboratory of Hydroscience and Hydraulic Engineering,Tsinghua University;Collage of Civil Engineering,Huaqiao University;Changjiang Institute of Survey Planning Design and Research;
The high-order doubly asymptotic boundary is capable of accurately approximating the unbounded domain over the entire frequency range.It converges to the exact solution quickly as its order increases and has high computational efficiency.Embedding the high-order asymptotic boundary directly into finite element scheme,a seamless coupled model for dam-reservoir dynamic interaction analysis is established.Similar to the finite element equation of the near field structure,the coefficient matrices of the direct coupled model are sparse and symmetric,and the governing equation can be solved using general finite element solver.Based on the finite element open source code OpenSees,the direct coupled model is implemented and applied to gravity damreservoir and arch dam-reservoir dynamic interaction analysis.Numerical results show that the proposed model has high computational accuracy and efficiency.
【Fund】： 水沙科学与水利水电工程国家重点实验室科研课题(2011-KY-3);; 国家自然科学基金(40974063 41274106)资助
【CateGory Index】： TV312
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