Modelling of ground moling dynamics by an impact oscillator with a frictional slider

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This paper describes current research into the mathematical modelling of a vibro-impact ground moling system. Due to the structural complexity of such systems, in the first instance the dynamic response of an idealised impact oscillator is investigated. The model is comprised of an harmonically excited mass simulating the penetrating part of the mole and a visco-elastic slider, which represents the soil resistance. The model has been mathematically formulated and the equations of motion have been developed. A typical nonlinear dynamic analysis reveals a complex behaviour ranging from periodic to chaotic motion. It was found out that the maximum progression coincides with the end of the periodic regime.

Original languageEnglish
Pages (from-to)85-97
Number of pages12
Issue number1
Publication statusPublished - Jan 2003


  • ground moling
  • impact oscillator
  • friction
  • nonlinear dynamics

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