Modal interaction in ultrasonic systems

Andrea Cardoni, Fannon Lim, Margaret Lucas, Matthew Cartmell

Research output: Contribution to conferencePaperpeer-review


High power ultrasonic systems are used in industrial applications such as welding and cutting. Common reliability problems, such as noise and component failures, often stem from participation of untuned modes in the driving mode due to nonlinear behaviour. A preliminary theoretical investigation to reduce the system nonlinearities is presented for the case of two Duffing oscillators. Experimental application of the theory to an ultrasonic cutting system demonstrates the validity of manipulating the nonlinear characteristics via ‘Nonlinear Cancellation Coupling’. Further, modal interactions in the form of combination resonances are characterised experimentally.
Original languageEnglish
Publication statusPublished - 16 Sep 2002
EventForum Acusticum Sevilla - Seville, Spain
Duration: 16 Sep 200220 Sep 2002


ConferenceForum Acusticum Sevilla


  • ultrasonic systems
  • nonlinear behaviour
  • Duffing oscillators


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