Browsing UiS Brage by Author "Hellevik, Karina"

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    • Effects of nonlinearities in the Equation of motion for one degree of freedom systems 

      Hellevik, Karina (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-12)
      Most natural phenomena in the world have a nonlinear behaviour. If systems are to be described by linear equations they must follow the superposition principle. The superposition principle, consisting of additivity and ...

    • Limit cycle oscillations at resonances 

      Hellevik, Karina; Gudmestad, Ove Tobias (Journal article; Peer reviewed, 2017)
      This paper deals with limit cycles in one degree of freedom systems. The van der Pol equation is an example of an equation describing systems with clear limit cycles in the phase space (displacement-velocity 2 dimensional ...