The Problem of Studying the Self-Oscillations of an Aerodynamic Pendulum in the Flow of a Medium

Abstract

The paper is devoted to the construction and research of a mathematical model of self-oscillations of an aerodynamic pendulum in the flow of a medium. As a model of the influence of the medium on the body, the model of quasi-static flow around the plate by the medium is adopted. According to this hypothesis, the aerodynamic forces acting on the body are applied at the center of pressure. In this problem, the center of pressure is mobile relative to the plate. The equations of motion for the body under consideration are obtained. The transition to new dimensionless variables is performed. Violation of uniqueness in determining the angle of attack is shown. Parametric analysis of ambiguity areas is performed. All stationary points that are solutions of the equilibrium equations are found. It is shown that there is no ambiguity in the most characteristic equilibrium position corresponding to the state of rest. A study of the stability of various equilibrium positions in which the Hurwitz criterion is implemented and the stability regions are depicted. It is shown that the forces of aerodynamic action for bodies with some shapes can contribute to the development of self-oscillations, and for others to damping. In the Matlab 18 mathematical package, a set of programs is written that allows you to build stability regions and perform numerical integration of equations describing body vibrations in order to confirm the adequacy of the constructed model.

Author Biography

Dmitry Valeryevich Belyakov, Moscow Aviation Institute (National Research University)

Associate Professor of the Department of Mathematics, Ph.D. (Engineering)

References

[1] Belyakov D.V., Samsonov V.A., Filippov V.V. Motion Investigation of Asymmetric Solid in Resistant Environment. Vestnik MEI. Bulletin of Moscow Power Engineering Institute. 2006; (4):5-10. Available at: https://elibrary.ru/item.asp?id=9455853 (accessed 02.07.2020). (In Russ., abstract in Eng.)
[2] Belyakov D.V. Development and Features of Mathematical Model of Movement Asymmetrical Autorotating Bodies in Quasi-static to Environment. Мechatronics, Automation, Control. 2007; (11):20-24. Available at: https://elibrary.ru/item.asp?id=9609383 (accessed 02.07.2020). (In Russ., abstract in Eng.)
[3] Samsonov V.A., Belyakov D.V., Cheburakhin I.F. Vertical reduction of a heavy symmetric autorotating body" in a resisting medium. Scientific Works (Bulletin of MATI). 2005; (9):145-150. (In Russ.)
[4] Samsonov V.A., Belyakov D.V. Mathematical modeling of the motion of a symmetric autorotating body, untwisted to a high angular velocity, in the air environment. Scientific Works (Bulletin of MATI). 2006; (10):196-200. (In Russ.)
[5] Belyakov D.V., Samsonov V.A. Evaluation of the capabilities of a new type of rotating object descending in the air. In: Medvedeva A.K. (ed.) Theses of XXVI Academic Readings on Cosmonautics. Moscow; 2002. p. 100. (In Russ.)
[6] Belyakov D.V. Mathematical modeling of the motion of a rotating object descending in the air. In: Fifth international Aerospace Congress IAC-06. Dedicated to the 20th anniversary of the launch of the MIR space station. Moscow; 2006. p. 62-63. (In Russ.)
[7] Belyakov D.V. Mathematical model of an unsymmetric autorotating body in a resisting medium. In: Proceedings of the XXXIII International Youth Scientific Conference "Gagarin Readings". M.: MATI; 2007. p. 27-28. (In Russ.)
[8] Belyakov D.V. Mathematical modeling of the motion of a rotating object descending in the air. In: Fifth international Aerospace Congress IAC-06. Dedicated to the 20th anniversary of the launch of the MIR space station. Moscow; 2006. (In Russ.)
[9] Belyakov D.V. Promising technologies for creating a safe descent system in the air. In: Proceedings of the all-Russian scientific and technical conference "New materials and technologies" - NTM-2008. М.: МАТI- RSTU; 2008. p. 117. (In Russ.)
[10] Lokshin B.Ya., Privalov V.A., Samsonov V.A. Introduction to the problem of the movement of a point and a body in a resisting medium. M.: MSU Publ.; 1992. (In Russ.)
[11] Samsonov V.A., Dosaev M.Z., Selyutskiy Yu.D. Methods of Qualitative Analysis in the Problem of Rigid Body Motion in Medium. International Journal of Bifurcation and Chaos. 2011; 21(10):2955-2961. (In Eng.) DOI: http://doi.org/10.1142/S021812741103026X
[12] Hartog J.P.D. Mechanical Vibrations. McGraw-Hill Book Company, Inc.; 1956. (In Eng.)
[13] Tabachnikov V.G. Stationary characteristics of wings at low speeds in the entire range of angles of attack. TsAGI Science Journal. 1974; (1621). (In Russ.)
[14] Strickland J.H., Webster B.T., Nguyen T. A Vortex Model of the Darrieus Turbine: An Analytical and Experimental Study. Journal of Fluids Engineering. 1979; 101(4):500-505. (In Eng.) DOI: http://doi.org/10.1115/1.3449018
[15] Lyatkher V.M. High Jet Power Station with Orthogonal Power Units. Alternativnaya Energetika i Ekologiya = Alternative Energy and Ecology. 2014; (7):21-38. Available at: https://elibrary.ru/item.asp?id=21497653 (accessed 02.07.2020). (In Russ., abstract in Eng.)
[16] Paraschivoiu I., Delclaux F. Double multiple streamtube model with recent improvements (for predicting aerodynamic loads and performance of Darrieus vertical axis wind turbines). Journal of Energy. 1983; 7(3):250. (In Eng.) DOI: http://doi.org/10.2514/3.48077
[17] Alqurashi F., Mohamed M.H. Aerodynamic Forces Affecting the H-Rotor Darrieus Wind Turbine. Modelling and Simulation in Engineering. 2020; 2020:1368369. (In Eng.) DOI: http://doi.org/10.1155/2020/1368369
[18] Parashivoiu I. Aerodynamic loads and rotor performance for the Darrieus wind turbines. Journal of Energy. 1982; 6:406-412. (In Eng.) DOI: http://doi.org/10.2514/6.1981-2582
[19] Zhuravlev V.F., Klimov D.M. Prikladnye metody v teorii kolebanij [Applied Methods in Vibrations Theory]. M.: Nauka; 1988. (In Russ.)
[20] Malkin I.G. Theory of Stability of Motion. U.S. Atomic Energy Commission; 1952. (In Eng.)
[21] Dosaev M.Z., Samsonov V.A., Seliutski Yu.D. On the Dynamics of a Small-Scale Wind Power Generator. Doklady Physics. 2007; 52(9):493-495. (In Eng.) DOI: http://doi.org/10.1134/S1028335807090091
[22] Samsonov V.A., Selyutskii Yu.D. Comparison of Different Notation for Equations of Motion of a Body in a Medium Flow. Mechanics of Solids. 2008; 43(1):146-152. (In Eng.) DOI: http://doi.org/10.1007/s11964-008-1015-x
[23] Samsonov V.A., Selyutskii Yu.D. About Vibrations of a Plate in a Flow of a Resisting Medium. Mechanics of Solids. 2004; (4):24. Available at: https://elibrary.ru/item.asp?id=17636289 (accessed 02.07.2020). (In Russ., abstract in Eng.)
[24] Privalov V.A., Samsonov V.A. On the Stability of Motion of a Body Autorotating in the Flow of a Medium. Izv. USSR Acad. Sci. MTT. 1990; (2):32-38. (In Russ.)
[25] Zhang J.Z., Liu Y., Sun X., Chen J.H., Wang L. Applications and Developments of Aeroelasticity of Flexible Structure in Flow Controls. Advances in Mechanics. 2018; 48(1):299-319. (In Eng.) DOI: http://doi.org/10.6052/1000-0992-16-034
Published
2020-09-30
How to Cite
BELYAKOV, Dmitry Valeryevich. The Problem of Studying the Self-Oscillations of an Aerodynamic Pendulum in the Flow of a Medium. Modern Information Technologies and IT-Education, [S.l.], v. 16, n. 2, p. 449-459, sep. 2020. ISSN 2411-1473. Available at: <http://sitito.cs.msu.ru/index.php/SITITO/article/view/659>. Date accessed: 20 sep. 2025. doi: https://doi.org/10.25559/SITITO.16.202002.449-459.
Section
Scientific software in education and science

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