VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University256210.18287/1998-6629-2014-0-5-4(47)-9-13UnknownFormation of spread in resonance stresses in bladed disks with non-identical blades and loose vibration conectednessErmakovA. I.<p>Doctor of Science (Engineering), Professor</p>fdla@ssau.ruUrlapkinA. V.<p>Engineer of sectoral research laboratory "Vibration resistance and reliability of aeronautical products"</p>urlapkin@gmail.comFedorchenkoD. G.<p>Candidate of Science (Engineering), Associate Professor</p>
<p>Chief designer</p>metallist@metallist-s.ruSamara State Aerospace UniversityJoint-Stock Company «Metallist-Samara», Samara23122014135-49131507201515072015Copyright © 2015, VESTNIK of the Samara State Aerospace University2015<p>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.</p>Model bladed diskharmonic analysismoving wavemistuningoscillation connectednesseigenvalue distrortionМодельное рабочее колесогармонический анализбегущие волнырасстройкасвязанность колебанийискажение форм[1. Ivanov V.P. Kolebaniya rabochikh koles turbomashin [Vibrations of Bladed Disks in Turbomachinery]. Moscow: Mashinostroenie Publ., 1983. 224 p.][2. Tobias S.A., Arnold R.N. The influence of dynamical imperfection on the vibration of rotating disks // Proceedings of the Institution of the mechanical engineers, 1957. 30 p.][3. Ermakov A.I., Urlapkin A.V., Fedorchenko D.G. Influence of vibration conectedness on eigenvalues of bladed disks with non-identical blades // Vestnik of the Samara State Aerospace University. 2014. No. 5(47), part 3. P. 77-82. (In Russ.) DOI: <a href='http://doi.org/10.18287/1998-6629-2014-0-5-3(47)-76-81'>10.18287/1998-6629-2014-0-5-3(47)-76-81</a>]