Structural Engineering and Mechanics

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Parameters identification of fractional models of viscoelastic dampers and fluids

  • Received : 2016.07.21
  • Accepted : 2017.02.24
  • Published : 2017.07.25
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Abstract

An identification method for determination of the parameters of the rheological models of dampers made of viscoelastic material is presented. The models have two, three or four parameters and the model equations of motion contain derivatives of the fractional order. The results of dynamical experiments are approximated using the trigonometric function in the first part of the procedure while the model parameters are determined as the solution to an appropriately defined optimization problem. The particle swarm optimization method is used to solve the optimization problem. The validity and effectiveness of the suggested identification method have been tested using artificial data and a set of real experimental data describing the dynamic behavior of damper and a fluid frequently used in dampers. The influence of a range of excitation frequencies used in experiments on results of identification is also discussed.

Keywords

Acknowledgement

Supported by : National Science Centre, Poland

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