Volume 26 Issue 5
May  2011
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Article Navigation >  Journal of Aerospace Power  > 2011  >  26(5): 1159-1165
TANG Wei, WANG Yan-rong, WANG Xiang-ping, YANG Jian-qiu. Numerical study of particle damping in two dimensions by use of discrete element method[J]. Journal of Aerospace Power, 2011, 26(5): 1159-1165.
Citation: TANG Wei, WANG Yan-rong, WANG Xiang-ping, YANG Jian-qiu. Numerical study of particle damping in two dimensions by use of discrete element method[J]. Journal of Aerospace Power, 2011, 26(5): 1159-1165.
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Numerical study of particle damping in two dimensions by use of discrete element method

  • 1.

    School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2.

    Shenyang Aeroengine Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

  • Received Date: 2010-05-17
  • Rev Recd Date: 2010-08-07
  • Publish Date: 2011-05-28
    Abstract
  • The physical model of particle damping in two dimensions was developed for the cavity with particles inside located at the free end of an L-shaped beam,and discrete element method (DEM) was used to investigate the effects of two-dimensional cavity sizes on particle damping.The results show that: (1) the highly nonlinear particle damping,which is at least one order of magnitude higher than the intrinsic material damping of metals,can significantly suppress the vibration of structures;(2) when dimensionless acceleration amplitude Γ<1,particle damping is very small;however,when Γ>1,it firstly increases and then decreases with the increase of Γ,indicating that there is a critical dimensionless acceleration amplitude for the highest damping;(3) the peak value of particle damping increases and appreciably shifts to the lower Γ with the increase of horizontal dimensionless impact clearance.However,it also increases but shifts to a higher Γ with the increase of vertical dimensionless impact clearances.The simulation results agree well with the experimental data,and can be applied to the practical design of a particle damper.

     

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