Formation of spread in resonance stresses in bladed disks with non-identical blades and loose vibration conectedness

The paper discusses the forced vibrations of mistunedbladed disks and loose vibration connectedness on the example of the model disk. It is shown that such wheels in separate frequency bands are losing the main features characteristic of systems with a small deviation from rotational symmetry. This leads to a qualitative change in the nature of their oscillations about the exciting harmonics. Otherwise becomes a mechanism for the formation of these scatter resonant stresses. It is found that the resulting vibrations in the bladed disks with a mistuning and loose vibration connectedness are a superposition of vibrations in several successively excited forms one family, the number of which may be up to a number of limited order of symmetry of the system occurring in the frequency range, depending on the accuracy of the blades.