Uma investigação sobre a aplicabilidade da teoria de sistemas não-ideais a fundações de máquinas reais. / An investigation on the applicability of the non-ideal systems theory to real machine foundations.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The main objective of the present project is to verify the interaction between the foundation structure of a machine - an industrial fan - with the excitation source, its own motor, in this case to identify possible occurrence of the so called "jump phenomenon", also known as Sommerfeld Effect. Such phenomenon is derived from the dynamic coupling between the excitation source and the structure during the passage through the different resonance states as the motor is accelerated until it arrives to its steady-state. It is possible to observe the same phenomenon at the moment of the deceleration. It is considered, in this work, the non-ideal source of energy model as the one that derives from the effective interaction between the motor of the machine with the structure, differently of the ideal source model, herein understood as exempted of any kind of interaction with the structure. As a consequence of the adopted model of the structure under analysis presenting few degrees of freedom, the equations of motion are defined, both for ideal and for nonideal systems, through the formulation of Lagrange, and their numerical solutions are obtained. It is concluded that if usual design Codes for machine foundations are applied to real engineering cases, the searched for phenomena are not observed.

ASSUNTO(S)

ideal and non-ideal energy source efeito sommerfeld sistema ideal e não-ideal de energia fundações de máquinas dinâmica das estruturas sommerfeld effect

ACESSO AO ARTIGO

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