PHASE TRAJECTORIES OF AEROELSTIC OSCILLATIONS OF SURFACE PIPELINE
This article is devoted to research dynamic behaviour of surface pipeline in a horizontal uniform wind flow. The investigations have been carried out on the basis of the conventional equations for the interactions between a bluff body of a circular cylinder and a uniform wind flow. The analysis was performed by a hybrid computer complex on the base of analog devices and digital computer treatment. Time processes, spectral characteristics of distributing of energy of oscillations on their frequencies and phase trajectories, are received at transient and stationary behaviours of vertical vibrations in a wide frequency range. The hysteresis effects in a resonance frequency ranges and zones where itaraction of free and forced oscillations appear.