VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University761610.18287/2541-7533-2019-18-4-87-95UnknownSimulation model of oscillations of the “sun gear – satellites” pair of turboprop engine planetary reduction gearbox in the presence of defects of tooth flanksKryuchkovA. N.<p><span lang="EN-US">Doctor of Science (Engineering), </span><span lang="EN-US">Professor, Department of Automatic <br />Systems of Power Plants</span></p>kan@ssau.ruPlotnikovS. M.<p><span lang="EN-US">Graduate Student</span></p>s_plotnikov@hotmail.comSundukovE. V.<p><span lang="EN-US">Candidate of Science (Engineering), <br /></span><span lang="EN-US">Head of the Integrated Research Laboratory</span></p>motor@kuznetsov-motors.ruSundukovA. E.<p><span lang="EN-US">Candidate of Science (Engineering), <br /></span><span lang="EN-US">Director</span></p>sunduckov@mail.ruSamara National Research UniversityJSC KuznetsovTurbine-SK LLC2112201918487952101202021012020Copyright © 2020, VESTNIK of Samara University. Aerospace and Mechanical Engineering2020<p>Defects of planetary reduction gearboxes of turboprop engines often cause excitation of high-frequency oscillations that bring about failures of compressor structural elements. The vibration behavior of these reduction grarboxes is a broadband process with the presence of a large quantity of vibration components, which significantly complicates the search for informative diagnostic indicators of defects. In order to simplify the procedure of identifying the vibrations caused by defects of toothed gearing a simulation model of the vibration behavior of a turboprop engine differential gear unit is proposed. The model takes into account kinematics and design of the gearbox, determines the structure of its vibration behavior in the presence of defects on the tooth flanks. Using the example of a commonly occurring defect in the form of wear of the teeth of the solar gear satellites pair the adequacy of the model to the actual vibration behavior of the mechanism is shown.</p>Турбовинтовой двигательпланетарный редуктордефекты боковых поверхностей зубьеввибродиагностикаимитационная модельTurboprop engineplanetary reduction gearboxtooth flank defectsvibration diagnosticssimulation model[1. Genkin M.D., Sokolova A.G. Vibroakusticheskaya diagnostika mashin i mekhanizmov [Vibroacoustic diagnostics of machines and mechanisms]. Moscow: Mashinostroenie Publ., 1987. 283 p.][2. Aviatsionnye zubchatye peredachi i reduktory: spravochnik / pod red. E.B. Vulgakova [Aviation gears and reducers / edited by E.B Vulgakov]. Moscow: Mashinostroenie Publ., 1981. 374 p.][3. Eliseev Yu.S., Krymov V.V., Nezhurin I.P., Novikov V.S., Ryzhov N.M. Proizvod-stvo zubchatykh koles gazoturbinnykh dvigateley [Production of gear wheels for gas turbine engines]. Moscow: Vysshaya Shkola Publ., 2001. 493 p.][4. Chuyko V.M. A.G. Ivchenko – strategist, organizer, scientist, designer. Conversion in Mechanical Engineering. 2004. No. 4. P. 103-106. (In Russ.)][5. Kurushin M.I., Balyakin V.B., Kurushin A.M. Experimental investigation of the courses of vibration excitation of elements of gas turbine engines with a differential reduction gearbox. Izvestiya Samarskogo Nauchnogo Tsentra RAN. 2014. V. 16, no. 4. P. 132-136. (In Russ.)][6. Vibratsiya energeticheskikh mashin: spravochnoe posobie / pod red. N.V. Grigor'eva [Vibration of energy-converting machinery: reference book / ed. by N.V. Grigorev]. Lenin-grad: Mashinostroenie Publ., 1974. 464 p.][7. Avramenko A.A., Kryuchkov A.N., Plotnikov S.M., Sundukov E.V., Sundukov A.E. Refining methods of vibration diagnostics of wear of turbo-prop engine differential speed re-duction unit gear teeth. Vestnik of Samara University. Aerospace and Mechanical Engineering. 2018. V. 17, no. 3. P. 16-26. DOI: <a href='http://doi.org/10.18287/2541-7533-2018-17-3-16-26'>10.18287/2541-7533-2018-17-3-16-26</a> (In Russ.)][8. Kostyukov V.N., Naumenko A.P., Boychenko S.N., Tarasov E.V. Osnovy vibroakus-ticheskoy diagnostiki mashinnogo oborudovaniya: uch. posobie [Fundamentals of vibroacous-tic diagnostics of machinery. Study guide]. Omsk: NTTs «Dinamika» Publ., 2007. 286 p.]