Căutare Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați după Data publicării

Afișează articolele 441-460 of 1845

    • Some Aspects About the Refractory Lining Wear in Furnaces 

      Bedő, Tibor (Universitatea "Dunărea de Jos' din Galați, 2007)
      For melting cast iron, carbon steel, copper and copper alloys the quartzite is still one of the most used lining material and the most cost effective as well. The silica lining has to be replaced frequently due to the ...

    • Damage Evolution of AL7175 and CK45 Alloys under Fretting Fatigue 

      Buciumeanu, Mihaela; Miranda, Antonio Sousa; Silva, Filipe Samuel (Universitatea "Dunărea de Jos" din Galaţi, 2007)
      There are several different parameters that affect the fretting fatigue behaviour of materials. The present work is focused on the influence of the wear damage evolution. Results of fretting fatigue experimental tests ...

    • Wear Prediction of Hip Endoprostheses 

      Căpitanu, Lucian; Onişoru, Justin; Iarovici, Aron (2007)
      The total hip prostheses can be considered as medical-mechanical devices with established failure. The large domain of common activities induces a wide spectrum of loadings in contact prosthetic parts. The contact conditions ...

    • Mechanical Resistance as a Function of Local Properties 

      Chiriţă, George; Ştefănescu, Ioan; Soares, Delfim; Silva, Filipe Samuel (Universitatea "Dunărea de Jos" din Galaţi, 2007)
      The present study makes an estimation of an automotive engine piston mechanical properties and fatigue life based on some characteristics of metallurgical microstructure. Because it is intended to assess the properties in ...

    • Dextrous Hand-Grasping Preshaping 

      Starețu, Ionel (Universitatea "Dunărea de Jos" din Galați, 2007)
      The research conducted in human grasping have emphasized three main phases: the visual location of the target, when the object is analyzed an recognized, the reaching phase of grasping, when the hand preshapes in order ...

    • The Energetic Analysis of Hydraulic Actuators Used for Small Mobile Cranes 

      Axinti, Gavril (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper presents applied usual solutions to the action of light self-propelled cranes, up to 6 tf. It is accomplished an analysis of usual solutions of action and more over of comanding the equipment. It is analized ...

    • A Model of the Mechanical Waves in Curved Bars 

      Oproescu, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2007)
      The different classical models of the mechanical waves in bars cover every a single type of the wave, respectively only longitudinal, transversal, inflexion or torsion wave and only in a rectilinear bar, every with his ...

    • Study of Noise Produced by Elevators Inside Buildings 

      Picu, Mihaela; Picu, Ana Alexandra (Universitatea "Dunărea de Jos" din Galați, 2007)
      This paper studies the way in which elevators movement produces work perturbing noises. The studies were made on two types of buildings: a modern building, with noiseless elevators and another one with old elevators. ...

    • Influence of the Road Dislevels Upon the Traction System of the Self-Propelled Machines 

      Axinti, Gavril; Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2007)
      The kinematic response is caused by run away about the equipment of the movement modeled in the mechanic system with degree of freedom. The kinematic excitation considered produces harmonic formally to the organ axle of ...

    • 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 ...