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1 Transactions of the Institute of Fluid-Flow Machinery

1 2003

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On the applicability of bar models for estimation of the set support structure oscillations

Shulzenko N. G., Gontarovsky P. P., Matyukhin Y. I., Kiciński J., Rybczyński J., Banaszek S.

Transactions of the Institute of Fluid-Flow Machinery

2003

nr 114

155-162

In this paper the problems of the construction of numerical models of different complication using simple-profile bars of the support structure of the laboratory roter are considered. The presence in the structure of the thin-walled elements of the opened profile (double-T shape element), for which the saint-Venant principle is not applicable and deformation of the cross-section takes place, does not allow to carry out the simple change of such elements to separate bars. For the adequate description of the double-T shape elements deformation they are modeled by bar frame structures. Results of calculations by proposed method of forced vibrations of the all rotor support structure in the frequency range till 200 Hz are good agreement with results of experimental investigations [1], and the results of calculations of free vibrations of the same structure without foundation - with results of analysis by more exact models using plate and spatial elements.