This paper develops a new application of dry friction theory in vibration control of aero - engine blades, espcially studies the dynamic characteristics and reducting vibration law of the shrouded dry friction damper. According to the feature that the dimension of shroud interface is relatively small, and under the assumption that the stress state and strain state are uniform, the mechanism of shroud dry friction interface are described by using macroslip model. On the basis of introducing the concept of dry friction nonlinear connection elements, the fixed - interface component mode synthesis methods are further developed and applied to reduce the orders of dynamic finite element model of shrouded blades. The concept of shroud dry friction damping factor is presented to measure dry friction damping at shroud interface. The two step iterative algorithm that is proposed in predicting the steady state response characteristics improves the bad convergence of Picard one step iterative algorithm. The related computer programs are written in fortran 77. The numeric analysis for the blades is completed.
The steady state response calculation and damping vibration analysis of shrouded blades
Berechnung des Verhaltens im stationären Zustand und Analyse der Schwingungsdämpfung von gedämpften Flugzeugpropellern
1994
7 Seiten, 10 Bilder, 8 Quellen
Aufsatz (Konferenz)
Englisch
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