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A Novel Method for Modal Analysis of Dam-Reservoir Systems | ||
| Civil Engineering Infrastructures Journal | ||
| مقاله 3، دوره 57، شماره 1، شهریور 2024، صفحه 33-59 اصل مقاله (1.21 M) | ||
| نوع مقاله: Research Papers | ||
| شناسه دیجیتال (DOI): 10.22059/ceij.2023.349505.1873 | ||
| نویسندگان | ||
| Mohammad Rezaiee-Pajand* 1؛ Mohammad Sadegh Kazemiyan2؛ Zahra Mirjalili3 | ||
| 1Professor, Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran. | ||
| 2Assistant Professor, Department of Civil Engineering, Eqbal Lahoori Institute of Higher Education, Mashhad, Iran. | ||
| 3Ph.D. Candidate, Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran. | ||
| چکیده | ||
| For dynamic modal analysis of the gravity dams, it is required to solve the non-symmetric eigenvalue problem which is a time-consuming process. This paper aims to propose a new procedure for this purpose. In this novel method, there is no need to solve the non-symmetric coupled eigenproblem. Instead, two novel eigenvalue problems are formulated and solved. They are simultaneously applied for dynamic modal analysis of concrete gravity dams. They represent the cubic-symmetric forms of the respective non-symmetric Eigenvalue problem, and they are entitled “cubic ideal-coupled eigenproblems”. Moreover, it is proved that the decoupled and ideal-coupled schemes presented in the previous works can be considered as special cases of the current more general procedure. For solving the aforesaid cubic eigenproblems, the classical subspace algorithm is generalized. To assess the accuracy of the suggested technique, it is employed for the dynamic analysis of two well-known benchmark gravity dams in the frequency domain. The dam crest responses are calculated under upstream and vertical excitations for two different wave reflection coefficients. Then, the obtained results are compared with those of the decoupled and ideal-coupled approaches. Findings corroborate the fact that the authors' formulation is more accurate than the other two aforesaid tactics under all practical conditions. | ||
| کلیدواژهها | ||
| Concrete Gravity Dam؛ Coupled Method؛ Cubic Ideal-Coupled Method؛ Decoupled Method؛ Fluid-Structure Interaction؛ Ideal-Coupled Method | ||
| مراجع | ||
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