Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Transactions of the Institute of Fluid-Flow Machinery

2 2003

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

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.

Influence of operational modes of a powerful turboset on its vibrational state

Shulzenko N. G., Efremov Yu. G.

Transactions of the Institute of Fluid-Flow Machinery

2003

nr 114

147-153

A correlation method for estimation of the influence of the change of turboset operational modes on its vibrational state using experimental data at post-analysis is used. For the solution of the problem in the automated operational mode of a system for vibrational diagnostics, the method using average value and current values of indexes of vibrational and technological processes is proposed. The results of full-scale investigations of vibrational state of the turboset at the change of power consumption are presented.