Simulation of Particle Damping under Centrifugal Loads

Particle damping is a technique to reduce the structural vibrations by means of placing small metallic particles inside a cavity that is attached to the structure at location of high vibration amplitudes. In this paper, we have presented an analytical model to simulate the particle damping of two dimensional transient vibrations in structure operating under high centrifugal loads. The simulation results show that this technique remains effective as long as the ratio of the dynamic acceleration of the structure to the applied centrifugal load is more than 0.1. Particle damping increases with the increase of particle to structure mass ratio. However, unlike to the case of particle damping in the absence of centrifugal loads where the damping efficiency strongly depends upon the size of the cavity, here this dependence becomes very weak. Despite the simplicity of the model, the simulation results are considerably in good agreement with the very scarce experimental data available in the literature for particle damping under centrifugal loads.

Authors:

• Riaz A. Bhatti
• Wang Yanrong

Keywords:

• Impact damping
• particle damping
• vibration control
• vibration suppression.

References:

[1] J. J. Moore and A. B. Pallazzolo, "A forced response analysis and
application of impact damper to Rotordynamic Vibration Suppression in
a Cryogenic Environment", Journal of Vibration and Acoustics, vol.
117, 1995.
[2] E. M. Flint, "Experimental measurement of the particle damping
effectiveness under centrifugal loads" Proc. of 4th National Turbine
Engine High Cycle Fatigue Conference HCF'99, 1999
[3] E. M. Flint, E Ruhl and S. E. Olson, "Experimental centrifuge testing
and analytical studies of particle damping behavior", CSA Engineering,
Inc, Report number A124674, 2000.
[4] M. Brach, "Mechanical Impact Dynamics, Rigid body collisions",
Chapters 2-6, John Wiley, 1991.
[5] R. D. Friend and V. K Kinra, "Particle Impact Damping", Journal of
Sound and Vibration, 233(1), pp 93-118, 2000.
[6] R. A. Bhatti, Y. R. Wang and Z. C. Wang, " Particle impact damping in
two dimensions", Journal of Key Engineering Materials, Damage
Assessment of Structure VIII, vol. 413-414, pp. 415-422, 2009.
[7] R. A. Bhatti and Y. Wang, " Damping performance of a particle damper
in two dimensions", ASME 2009 Design Engineering and Technical
Conference & Computer and Information in Engineering Conference,
paper number DETC2009-86862, 2009, To be published.
[8] K. Mao, M. Y. Wang, Z. Xu and T. Chen, "Simulation and
Characterization of Particle Damping in Transient Vibrations", Journal
of Vibration and Acoustics, vol. 126, pp 202-211, 2004.
[9] M. R. Duncan, C. R. Wassgren and C. M. Krousgrill, "The damping
performance of a single particle impact damper", Journal of Sound and
Vibration, vol. 286, pp. 123-144, 2005.
[10] V. K Kinra, K. S. Marhadi and B. L. Witt, "Particle impact damping of
transient vibration", 46th AIAA Structural Dynamics & Material
conference, Paper no. AIAA 2005-2324, 2005.
[11] M. Saeki, "Analytical study of multi-particle damping", Journal of
Sound and Vibration, 281, pp. 1133-1144, 2005.
[12] B. L. Witt and V. K. Kinra, "Particle impact damping in the horizontal
plane", 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural
Dynamics and Materials Conference, paper no. AIAA 2006-2209, 2006.