The behavior of bilinear impact oscillators subjected to random forcings

A multistable regime of a bilinear vibro-impact oscillator in the presence of noise has been studied, for which relatively lesser attractors coexist with a well-defined basin boundary structure in the phase space. The effect of adding parametric noise in this model has been investigated and the switching that the system undergoes between the basins of its different attractors has been examined.

Determination of Reliability of Rotor-Annular Seals System by Theory of Runs of Random Functions

The paper discusses forced combined angular-radial oscillations of rotor centrifugal pump model under the influence of random forcings. System reliability is evaluated using the theory of random functions runs: the probability of finding a random vector of quality system “rotor-annular seals” in the range of admissible values of its parameters is determined. Evaluation of the influence of erosive wear of sealing surfaces in the process of pump operating on reliability system is made.