Căutare după Subiect "vibrations"

Afișează articolele 1-12 of 12

    • About Non-Autonomous Vibrations of Mechanical Systems 

      Cauteș, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2010)
      Non-linear vibrations of mechanical systems are described by differential equations of the second order, which are generally written .. . x f ( x, x,t )  0 . In this work we study non-autonomous vibrations of mechanical ...

    • About of the Analytical Exactly Solutions of the Differential Equations of the Non-Linear Oscillators 

      Cauteș, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2004)
      This work presents the manner of the solving of the non-linear differential equations from order II with the form &y& + p(t)y = q(t)y1-2a . These equations can characterize the excited vibrations of the mechanical ...

    • About Phonic Isolation of the Mobile Equipment Cabin 

      Anghelache, Diana (Universitatea "Dunărea de Jos" din Galați, 2008)
      This work presents vibration absorbing and damping solutions for operator cabin on construction equipment. Hereby, the operator cabin has to be considered accordingly. Vibration proof and sound proof materials applied ...

    • 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 ...

    • Elastic System Designed for Base Insulation Against Dynamic Action of Vibrations and Seism 

      Bratu, Polidor (Universitatea "Dunărea de Jos" din Galați, 2004)
      The approach regarding building base insulation puts into evidence the possibility to evaluate the antiseismic insulation degree in a direction defined using supporting elastic systems having various geometry, structure ...

    • 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 ...

    • On the Efficiency of Compacting Equipment 

      Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2010)
      In this paper, the efficiency of vibratory rammer during compaction is examined. A three-degree-of-freedom model has been established for analytical representation of the soil-rammer interaction. In the first approach, it ...

    • Simulation of Dynamical Systems with Linear and Non-Linear Behavior in Scicos Environment 

      Gillich, Gilbert-Rainer (Universitatea "Dunărea de Jos" din Galați, 2005)
      The paper presents the SCICOS program and the way how to formalise dynamic system with known physical and mathematical models in this environment. Using simple examples from the field of vibrations, it is shown how “continuous ...

    • The influence of the Rolling track on the Dynamic Comportment of the equipement on tyres 

      Axinti, Gavril; Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2005)
      The paper presents aspects connected to the comportment of the vehicle on wheels which moves on dislevement soil. A complete dynamic model is realized for a vehicle on wheels with tyres, which wheels are rigidly tied to ...

    • Working Characteristics of the Special Isolation Devices Against Vibratory Actions 

      Năstac, Silviu-Marian (Universitatea "Dunărea de Jos" din Galați, 2007)
      The actual researches for finding optimal antiseismic protection solutions are straightening to the few areas of activity: the first area of research is the base isolation of buildings or theirs parts, against the ...