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Titolo: Chelomei's pendulum explained
Autore: Thomsen, JJ; Tcherniak, DM;
 Indirizzi:
 Tech Univ Denmark, Dept Mech Engn Solid Mech, DK2800 Lyngby, Denmark TechUniv Denmark Lyngby Denmark DK2800 d Mech, DK2800 Lyngby, Denmark Bruel & Kjoer Sourd & Vibrat AS, DK2850 Noerum, Denmark Bruel & Kjoer Sourd & Vibrat AS Noerum Denmark DK2850 0 Noerum, Denmark
 Titolo Testata:
 PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES AMATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
fascicolo: 2012,
volume: 457,
anno: 2001,
pagine: 1889  1913
 SICI:
 13645021(20010808)457:2012<1889:CPE>2.0.ZU;25
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 HIGHFREQUENCY EXCITATION; VIBRATION; DYNAMICS; OSCILLATIONS; BEAM; MASS;
 Keywords:
 Chelomei's pendulum; effects of highfrequency vibrations; dynamic stabilization;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Physical, Chemical & Earth Sciences
 Citazioni:
 33
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Tcherniak, DM Tech Univ Denmark, Dept Mech Engn Solid Mech, Bldg 404, DK2800 Lyngby, Denmark Tech Univ Denmark Bldg 404 Lyngby Denmark DK2800 , Denmark



 Citazione:
 J.J. Thomsen e D.M. Tcherniak, "Chelomei's pendulum explained", P ROY SOC A, 457(2012), 2001, pp. 18891913
Abstract
Chelomei's pendulum has a sliding disc on its rod, and is mounted on a support that vibrates vertically with small amplitude and high frequency. In 1982, V. N. Chelomei demonstrated experimentally that a configuration can bestable where the pendulum points against gravity, and the disc 'floats' onthe rod. This phenomenon has never been satisfactorily explained. The present work considers why and where the disc floats. It suggests that the phenomenon is caused by resonant flexural rod vibrations, which are excited through small symmetrybreaking imperfections, such as a small deviation from perfectly vertical excitation. This hypothesis is supported by laboratory experiments, and by perturbation analysis and numerical analysis of a new mathematical threedegreeoffreedom model of the system. Simple analytical expressions for the prediction of stable states of the system are set up, providing frequency responses that agree closely with numerical simulation, and agree qualitatively with experimental observations.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 12:21:41