Analysis of a Torsional Fluid Film Vibrator-Reference-Cited by-同舟云学术

Analysis of a Torsional Fluid Film Vibrator

Published:2002-05-31 Issue:3 Volume:124 Page:480-485
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Suciu C. V.¹,Iwatsubo T.²,Pascovici M. D.¹

Affiliation:

1. Department of Machine Elements and Tribology, “Politehnica” University of Bucharest, 313 Splaiul Independentei, 79590 Bucharest 6, Romania

2. MS-1 Laboratory, Mechanical Engineering Department, Kobe University 1-1-1 Rokkodai, Nada, 657-8501 Kobe, Japan

Abstract

A novel hydrodynamic system, called torsional fluid film vibrator (TFFV) is proposed. This device is complementary to the Lanchester’s absorber and presents a classical response of a one-degree of freedom linear system with a periodical self-excitation. The fluid film thickness variation produces a variable viscous drag moment, which drives the elastically supported bush in a torsional oscillatory movement. The TFFV concept is connected with current research to improve the drilling technology of deep holes. The Navier-Stokes equations are solved on the particular geometry of this vibrator and the viscous drag moment is explicitly presented. The theoretical part is continued with the TFFV dynamic simulation and the analysis of the influence of the geometrical parameters on the amplitude of the viscous drag moment. Computed structural friction power and the amplitude of vibration agree reasonably well with the experimental measurements conducted on a TFFV test rig.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/124/3/480/5820308/480_1.pdf

Reference10 articles.

1. Harris, C. M., and Crede, C. E., 1968, Shock and Vibration Handbook, McGraw-Hill, New York.

2. Mu, C., Darling, J., and Burrows, C. R., 1991, “An Appraisal of a Proposed Active Squeeze Film Damper,” ASME J. Tribol., 113, pp. 750–754.

3. Bonneau, O., and Fre^ne, J., 1994, “Numerical Study of a Flexible Rotor Mounted in an Active Squeeze Film Damper,” 4th International Conference on Rotor Dynamics, IFTOM, Chicago, pp. 327–331.

4. Suciu, C. V., Bonneau, O., Brun-Picard, D., Fre^ne, J., and Pascovici, M. D., 2000, “Study of a Novel Squeeze Film Damper and Vibration Generator,” ASME J. Tribol., 122, pp. 211–218.

5. Suciu, C. V., Pascovici, M. D., and Iwatsubo, T., 2000, “Study of a Torsional Fluid Film Vibrator,” Synopses of the International Tribology Conference, Nagasaki, Vol. 2E1-2, p. 138.

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