Analise numerica e experimental do comportamento dinamico de palhetas flexiveis

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The development of the equations of motion for flexible blades coupled to rotating machines is presented in this work. These equations are discretized using the Finite Element Method, with a three-dimensional approach. It was firstly developed a computer program using the MATLAB language in order to study the natural frequencies variation in blades with simple geometric shapes, as a function of the angular velocity. Afterwards, this computer program was employed to perform the dynamic analysis of blades of a industrial compressor. The blade numerical model was updated with experimental measurements of its natural frequencies for three different conditions : free-free, mounted on the compressor and clamped in a structure. From numerical simulations and Campbell diagrams of the blades, the critical speeds of the compressor are estimated in two different conditions : normal operation and during its start-up velocity curve

ASSUNTO(S)

metodo dos elementos finitos rotores - dinamica turbinas a gas

ACESSO AO ARTIGO

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