Căutare după Autor "f6f3f3ac-bcab-459c-a81d-60d9d0dfaf58"

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    • Aspects Regarding the Study of a Vibratory Device Which Acts a Medical Apparatus 

      Dragomirescu, Cristian; Craifaleanu, Andrei (Universitatea "Dunărea de Jos" din Galați, 2012-05-01)
      The paper studies, from the electromechanical point of view, a medical apparatus designed for spine treatment by vibrations. The differential equations of motion of the system have been obtained by using Lagrange equations ...

    • Aspects Regarding the Vibrations of the Contacts of a compressed air Switch 

      Dragomirescu, Cristian; Craifăleanu, Andrei (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper studies the vibrations of the contacts of a compressed air switch, by considering two models. Time variation of the elongation is presented, as well as spectral representations determined by means of Fourier ...

    • Considerations Regarding the Stability of High-Speed Shafts 

      Dragomirescu, Cristian; Crăifăleanu, Andrei; Iliescu, Victor (Universitatea "Dunărea de Jos" din Galați, 2011)
      The paper studies the problem of the dynamic stability of a high-speed shaft, subjected to bending vibrations. The case of normal machine tool shafts placed on rigid or flexible bearings is considered for different situations. ...

    • Considertions on the Mechanical Vibrations of an Electronic Circuit Board 

      Dragomirescu, Cristian; Iliescu, Victor; Crăifăleanu, Andrei (Universitatea "Dunărea de Jos" din Galați, 2010)
      The paper analyzes the dynamic stresses induced by mechanical vibrations on an electronic circuit board, considering different study hypotheses, resulting from real cases presented in technical texts. The corresponding models ...

    • Non-Linear Dynamic Behavior of a Ball Float Valve 

      Dragomirescu, Cristian; Crăifăleanu, Andrei (Universitatea "Dunărea de Jos" din Galați, 2012)
      The dynamic behavior of the spherical body floating in a liquid, part of a ball float valve, is analyzed from the point of view of the dynamic systems theory. The study of the motion illustrates the differences between ...

    • Study of the internal Resonance of a two-Degree-of-Freedom Non-Linear Dynamic System 

      Dragomirescu, Cristian; Craifăleanu, Andrei (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper analyses a two- degree- of- freedom dynamic system, by taking into account its non- linearity. The case of the internal resonance is studied and, by local analysis, Hopf bifurcations are emphasized. Periodic ...