Volume 28 Issue 4
Apr.  2013
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LI Lin, FAN Yu, DAI Guang-hao. Frequency domain solution of 2-DOF torsional dry friction system[J]. Journal of Aerospace Power, 2013, 28(4): 850-857.
Citation: LI Lin, FAN Yu, DAI Guang-hao. Frequency domain solution of 2-DOF torsional dry friction system[J]. Journal of Aerospace Power, 2013, 28(4): 850-857.

Frequency domain solution of 2-DOF torsional dry friction system

  • Received Date: 2012-05-03
  • Publish Date: 2013-04-28
  • The forced vibration response of a two degree of freedom (DOF) torsional system with Coulomb friction was studied,with a full consideration of the pure-slip and stick-slip contact motions.First,the 2-DOF lumped parameter model of such nonlinear system was presented and derived into a non-dimensional form.Second,the harmonic balance approach was used to establish a general frame of solving the response under different contact motion.Accordingly,the critical condition as well as the harmonic expands of friction force of the pure-slip and stick-slip contact motions were presented.Finally,the procedure of dealing with frequency domain solution was proposed.Based on this method,a group of results were obtained under different normal pressures,and were validated by the numerical integration method with a very good agreement.The proposed semi-analytical method provides more clear insights of the torsional dry friction system and therefore has advantage in computational cost.

     

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