dynamic interaction dam-reservoir: analytical and numerical models / Interação dinâmica barragem-reservatório : modelos analíticos e numéricos

AUTOR(ES)

Selênio Feio da Silva

DATA DE PUBLICAÇÃO

2007

RESUMO

In the present work, the interaction problem between the dam structure and the fluid of the reservoir is studied in a dynamic analysis in the frequency domain. An analytical procedure through the variable separation technique is used to solve the mathematical models equations that represent the problem, resulting in analytical formulations for the field of hydrodynamic pressures on the dam-reservoir plane and for the additional mass in the face of the dam. Some contributions, with certain originality, are presented in this thesis, such as: a proposal for a analytical function for the hydrodynamic pressure distribution along the height and at the dam face, also a proposal of damper for the truncation surface in reservoirs with infinite domain and incompressible and compressible fluids, as well as an analytical procedure to the boundary conditions of the classic shock absorbers treated in the literature by the finite element method. In this thesis, the mathematical models adopted and the boundary condition in the damreservoir interface tries to represent the physical models for this kind of problem. Thus, it presents more sophisticated models in increasing order of the chapters, considering first an initial model which treats the dam with a movement of rigid body and the reservoir fluid as incompressible up to a model that takes into account the dam flexibility and the fluid compressibility effects. For boarding the problem of dam-reservoir interaction in the boundary element method and in the finite element method (with ANSYS), numerical models were used as well as the classical solutions of the literature with the objective of comparing and validating the analytical solutions given by the variable separation technique that are being proposed in this work. Also some examples are presented with regard to the analyses illustrating the viability of the developed techniques.

ASSUNTO(S)

técnicas de separação de variável massa adicional interação barragem-reservatório estruturas pressão hidrodinâmica

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