The influence of elastic-dissipative coupling parameters on resonant vibrations of systems with violated cyclic symmetry

摘要

This paper deals with the regularities of theinfluence of the variation of the elastic-dissipative couplingparameters of subsystems on the formation of resonant vibrationsof systems with a violated cyclic symmetry, like shrouded bladeassemblies, and gives the results of numerical calculations. Theformation of the amplitude- frequency characteristics and thedistribution of resonant vibration amplitudes of the systemsunder study is shown to depend on the relationship betweenelastic and dissipative characteristics of coupling of thesubsystems. When the elastic coupling is stiff, which provideslocalization of vibrations of the elastically-coupled system, theintroduction of dissipative coupling does not cause any changesin the behavior of the amplitude-frequency characteristics, andthe degree of localization is almost independent of the dissipativeproperties of the coupling. As the stiffness of the elastic-dissipative coupling grows, the localization of vibrations showsup only at certain values of the dissipative characteristics of the coupling.