Căutare 1995-2015 după Data publicării

Afișează articolele 81-100 of 326

    • The Grinding Charge of Rotary Mills 

      Ene, Gheorghe (Universitatea "dunărea de Jos" din Galați, 2007)
      This paper presents the achievemens of grinding charge for the tube mills with balls.The author shows charactheristic size of grinding media charge: bulk density, porosity, filling degree. Regarding this last size,the author ...

    • All-Purpose Low Frequency Numerical Filter 

      Oproescu, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2007)
      A real signal is a complex system with mixed components. In addition to needed components appear unusable components with different origin, namely noise. The clearance or the reduction of the unwanted components is ...

    • The Idenfication (In Simulink) of an Elastic 

      Bălan, George C.; Ioniță, Bogdan (Universitatea "Dunărea de Jos" din Galați, 2007)
      In this paper is realized the identification of an elastic system with one degree of freedom, for which we experimentally pick up (in SIMULINK) the resonance curve. The system parameters (m, c, k) are determined using ...

    • The Noise at Work and the Professional Diseases 

      Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2007)
      This article describes the effects of workplace noise and outlines the main steps that should be taken to reduce and control noise at work. Exposure to noise at work can harm workers’ health. The most wellknown effect ...

    • The Impact of Occupational Noise on the Workers. Romanian and EU Legislation 

      Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2007)
      Noise is most obviously a problem in industries such as manufacturing, mining and construction but it can also be an issue in a wide range of other working environments like energy, transports, call centers, schools, orchestra ...

    • The Dynamics of the Rigid Body with Passive Hydraulics Linkages 

      Axinti, Gavril; Nedelcuț, Florin (Universitatea "Dunărea d Jos" din Galați, 2007)
      The paper refers to the case of the rigid body subject to linkages materialised through linear hydraulics engines. We will settle the mathematic model of the rigid and will determine its kinetic and dynamic characteristics. ...

    • 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 ...

    • Numerical Simulations of the Special Isolation Devices Against Vibratory Actions 

      Năstac, Silviu-Marian (Universitatea "Dunărea de Jos" din Galați, 2007)
      In this paper the author use the physical and mathematical models for the antiseismic and antivibrational elastic systems and describe the dynamic behaviour of this systems, for the few types of the vital equipment - ...

    • The Dynamic Modelling of the Mechanical Systems. Calculus of the Equivalent Mass and Equivalent Mass Inertia 

      Debeleac, Nicoleta; Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2007)
      This study presents the phases and the final result of the physical and mathematical models' elaboration of mechanical systems with elastical and rigid elements taking into consideration the equivalent mass and inertia. The ...

    • The Impact of the Technological Equipment Vibration on the Environment 

      Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2007)
      The shocks & vibrations generated by the operation of such tools, are conveyed to the foundation environment affecting both the near – by building safety and the comfort of the unit personnel and of the surrounding ...

    • Dynamic Models for the Traction System of the Self-Propelled Machines 

      Axinti, Adrian-Sorin; Goanță, Adrian Mihai (Universitatea "Dunărea de Jos" din Galați, 2007)
      The work presents a classification of traction systems as a function of structure, the systems being classified into: integrally mechanical-tractional systems–STIM, mechanical-hydrostatical tractional -STMH and integrally ...

    • Mathematical Models for the Whole Traction Mechanical System of the Technological Self-Propelled Machines 

      Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper achieves mathematical models of the integral traction mechanical system, that is the system achieved only with gearings organized in the transmission components , gearboxes, card differentials transmissions, ...

    • The Analysis of the Bending Sprigs' Weight Influence on the Resonance Characteristic of the Elastical Mechanical Systems 

      Debeleac, Carmen-Nicoleta; Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2007)
      The Analysis of the Bending Springs' Weight Influence on the Resonance Characteristic of the Elastical Mechanical Systems

    • Geometry Stage 3D Modeling of a Heat Station Pump 

      Goanță, Adrian Mihai; Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper presents the stages of the 3D modelling of a circulation pump in a domestic low-power heat station. The possibilities of modifying the geometry by changing the numerical size of the geometric parameters are ...

    • 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 ...

    • Assisted Research of the Rigidity Amplitude of Worm-Gearing Tooth 

      Ghelase, Daniela; Dașchievici, Luiza (Universitatea "Dunărea de Jos" din Galați, 2007)
      By means of own software, which evaluates the rigidity of the worm-gear-tooth system, the paper presents some aspects regarding the amplitude of rigidity. The study was made on the elasticity characteristic of worm-gearing ...

    • The Study of the Influence of Stability for Hydraulic Tracked Excavators Excavators with Bucket Using Assisted 

      Hauk, Niculai (Universitatea "Dunărea de Jos" din Galați, 2007)
      The technological process of digging the natural earth using hydraulic excavators with bucket has the following steps: dislocation, transporting and depositing in means of transportation. During this process the excavator ...

    • Diagnostic of Structural integrity Using the Non-Linear Vibration 

      Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2007)
      The aim of the work presented here was to investigate the possibility of using hangs in the non-linear vibration characteristics to detect damage in mechanical structure. The nonlinearities were detected by examining the ...

    • The Mechanical Low Frequency Signal Reconstruction by it's Spectral Components 

      Grigorescu, Luiza (Universitatea "Dunărea de Jos" din Galați, 2007)
      This paper is a point of view of a new way of signal reconstruction through it’s spectral components. Sampling theory is analyzed from different perspectives, what means if for technical reasons the time can’t be sampled ...

    • Assessing and Controlling the Noise in Construction. Romanian and EU Legislation 

      Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2008)
      Exposure to loud noises at work can cause irreversible hearing damage, workplace accidents and be a contributing factor to other health problems. Noise-induced hearing loss is the most common reported occupational disease ...