Estudo da influencia dos perfis de solo na resposta dinamica de sistemas rotor-fundação / Study of the influence of soil profiles on dynamic response of rotor-foundation systems

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The aim of the present work is to extend and improve the dynamic analysis of a rotorfoundation-soil system by including the modelling of distinct soil profiles. The unbalance response of a simple two-dimensional Laval (Jeffcott) rotor with rigid bearings is performed. The rotor is attached to a rigid strip foundation (block foundation). The soil profiles, on the other hand, include the classical half-space but also stratified soils. In particular, a layer with various depths over a bedrock will be considered. The soil?s dynamic response is furnished in terms of frequency dependent complex impedances. The soil internal damping mechanism is also addressed by making the soil a viscoelastic continuum. A series of parametric studies are perfomed to assess the role of soil layer thickness, soil internal damping coefficient, foundation inertia and bearing height on the rotor unbalance response. It is believed that the analysis of this simple otor-foundation-soil model will help to clarify the role of the mentioned parameters on the rotor dynamic response

ASSUNTO(S)

interação solo-estrutura visco elastic model rotores - dinamica rotor-foundation-soil umbalance response dinamica dynamic

ACESSO AO ARTIGO

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