Analysis of some extreme situations in exploitation of complex rotary systems

  • R. Jonušas Kaunas University of Technology
  • E. Juzėnas Kaunas University of Technology
  • K. Juzėnas


Complex rotary systems (CRS) are widely used in energetic, chemical industry. Their reliability is one of the main tasks of plant engineering, because costs of mainte-nance and production loses are really significant.

Vibrodiagnostics of such systems is one of the main tools applied for the evaluation of machines condi-tion. However complexity of those systems, probability of various defects condition that reliable determination of sources of vibrations is not always achievable. Therefore additional mean for defects determination may be applied – numerical modelling of systems dynamical condition.

This article presents data of experimental and numerical research of a CRS, where the phenomenon of rubbing occurs and subharmonic vibrations are generated. Modelling of such realistic system is also a highly compli-cated problem, therefore improvement of numerical model, based on experimental data is needed.