Sfoglia 2004 fascicula14 per Data di Pubblicazione

Items 1-18 di 18

    • Hydraulic Plant with Energy Inertia Recuperator for Single Bucket Excavator 

      Axinti, Gavril (Universitatea "Dunărea de Jos" din Galați, 2004)
      This paper analyse the driving solutions for hydraulic single bucket excavators, by the point of view of the energy consumptionon the technological working cycle. It is presented a solution of accumulation and re-circulate ...

    • The Technological Resource of Digging and Transport Heavy Equipmens Used in Road Costructions 

      Sârbu, Laurențiu (Universitatea "Dunărea de Jos" din Galați, 2004)
      For it can be applied the efficiency analysis of a mecanical system , on the basis of probabilistic transform and correlation methods , in the case of industrial tractors which are working in aggregate with different ...

    • Dynamic Analysis of Electro-Hydrodynamic Vibratory Equipment Using Virtual Prototyping Technique 

      Axinti, Gavril; Năstac, Silviu (Universitatea "dunărea de Jos" din Galați, 2004)
      In this paper the authors analyse the functional behaviour of an electrohydrodynamic vibratory equipment, that could be used to vibro-driving the piles into the powerless soils, to drive a demolition hammer, a.s.o. ...

    • Mathematical Model for Dynamic Behaviour Analysis of the Passive Isolation Systems 

      Năstac, Silviu (Universitatea "Dunărea de Jos" din Galați, 2004)
      In this paper the authors present a set of mathematical models, usable to simulate and analyse the static and dynamic behaviour aspects, both for the passive anti-vibrational and anti-seismical systems, and for all ...

    • 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 ...

    • The Model of the Forging Hammers Like System with three Degree of Freedom 

      Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2004)
      Forging hammers cause very high vibration levels, so vibration control is advisablein nearly all cases. For this reason, in present exist recearch with the object of to decrease and eliminate the shocks and vibration ...

    • Dynamic Analyze for the Chassis-Cab System Having Elastic Intermediate Link (Elastic Interface) 

      Mihalcea, Aurelia (Universitatea "Dunărea de Jos" din Galați, 2004)
      Among the machinery generating occupational diseases due to the vibrations transmitted to human body the portable hand-held construction equipment such as drill hammers and demolition hammers are classified. In order ...

    • Analysis of the Anti-Seismic Passive Isolation System Based on the Virtual Prototyping 

      Năstac, Silviu (Universitatea "Dunărea de Jos" din Galați, 2004)
      This work propose a new onset for dynamic behaviour analysis of the passive anti-seismic and/or anti-vibrational elastic elements and systems. The basics of this new approach are constituted by the virtual prototyping ...

    • 3D Modelling Multiple Faucets Bodies 

      Rădulescu, Cătălin; Goanță, Adrian Mihai (Universitatea Dunărea de Jos" din Galați, 2004)
      In this work is doctored the way of tackles the and realization of a innards by the students in the program Autocad. The work has as objective a these accomodation with the commands 3D the and a crossing from 2D to 3D ...

    • Analitical evaluation of the Dynamic Performances for the Wheel Loader Analysis 

      Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2004)
      In this paper the author propose a physical and mathematical model, useful to analyse the dynamic performances of the wheel loader equipment. It supposed that the evaluation of the natural frequencies constitute a well ...

    • Autolisp & DCL Method for Automatic Technological Design 

      Goanță, Adrian Mihai; Rădulescu, Cătălin; Hauk, Niculai (Universitatea "Dunărea de Jos" din Galați, 2004)
      The work has as purpose to present the general principles of working with the technological processors in designing the casting technologies and to put into evidence the advantages of this designing method. As examples, the ...

    • Analysis of the Dynamic Response to Stochastic Actions on the Tilting System of the Loader Bucket with Hydraulic Correlator 

      Petrea, Ioan; Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2004)
      The resistance encountered by the active organ – the bucket – of the loader when digging into the material pile is part of the category of external influences applied to the equipment. Generally this force is not constant ...

    • A Solution to a Deflection Beam Problem 

      Dumitrache, Petru; Hauk, Niculai; Goanță, Adrian Mihail (Universitatea "Dunărea de Jos" din Galați, 2004)
      The present paper shows how the minimal total potential energy principle it is used for elastic systems in the case of the determination of the linearelastic displacements which determines the beams bending. Qualitative aspects ...

    • The Coefficient of Restitution in the Plastic Deformation Process 

      Drăgulin, Ichim; Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2004)
      In the analysis of dynamic processes and plastic deformation which appear on the forging and die forging equipments dint the shocks (forging hammers and screw presses), it is use frequently theoretical study of de collision ...

    • 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 Concrete Consolidation and Vibration 

      Paiovici, Roza; Ionescu, Ștefania (Universitatea "Dunărea de Jos" din Galați, 2004)
      Proper vibration of fresh concrete is an important process in order to ensure optimum strength, durability, and appearance of quality precast products. Accepted practices in the precast industry are unique in some respects ...

    • Research Regarding the Investigation of Steel Hardness 

      Picu, Mihaela (Universitatea "Dunărea de Jos" din Galați, 2004)
      Mobile hardness testing is on the advance: in these times of cost pressures and higher quality requirements there is a quick and economical supplement to stationary hardness testing in the modern production process. The ...

    • Regarding the Efficiency of the Decelaration Through Impedance Coiling of the Hydraulic Cylinders 

      Hauk, Niculai; Dumitrache, Petru (Universitatea "Dunarea de Jos" din Galați, 2004)
      The paper present a point of view sustained by calculations about the efficiency of the deceleration system by impedance coiling of the hydraulic cylinders. It is shown that the simple presentation of the impedance ...