Study of airfoil gust response alleviation using an electro-magnetic dry friction damper. Part 1: Theory |
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| Institution: | 1. Department of Mechanical Engineering and Materials Science, Duke University, Box 90300, Durham, NC 27708-0300, USA;2. Department of Civil Engineering, Duke University, Box 90300, Durham, NC 27708-0300, USA;1. Technical University of Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany;2. DLR Institute of Planetary Research, Germany;1. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Av. de los Descubrimientos s/n, 41092, Sevilla, Spain;2. Departamento de Ingeniería Energética, E.T.S.I.I., Universidad Politécnica de Madrid., C/ José Gutiérrez Abascal 2, 28006, Madrid, Spain;1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China;2. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, China;1. Institute of Space and Astronomical Sciences (ISAS/JAXA), 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan;2. Department of Space and Astronautical Science, The Graduate University for Advanced Studies (SOKENDAI), Sagamihara, Kanagawa 252-5210, Japan;1. CNRS, UMR 8107, F-59650 Villeneuve d’Ascq, France;2. USTL, LML, F-59650 Villeneuve d’Ascq, France;3. KU Leuven, Dept. MTM, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;4. Univ Lille Nord de France, F-59000 Lille, France |
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| Abstract: | An electro-magnetic controllable dry friction damper has been designed and numerically simulated. The gust response of a three degree-of-freedom typical airfoil section with a control surface using this non-linear damper has been studied theoretically. The effects of the different gust excitations and parameter variations of the non-linear damper on the non-linear aeroelastic response are discussed. The numerical results show the present electro-magnetic dry friction damper can be used to alleviate the dynamic response to both a periodic and a linear frequency sweep gust excitation, especially for the plunge and pitch responses. The results are also verified by an experimental investigation in a wind tunnel presented in a companion paper, Part 2. |
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