1995-2015: Recent submissions

Afișează articolele 181-200 of 326

    • Mathematical Model for Frequency-Dependent soil Propagation Analysis 

      Cauteș, Gheorghe; Năstac, Silviu (Universitatea "Dunărea de Jos" din Galați, 2002)
      Vibration analyses of advanced technology facilities typically must consider frequency as well as amplitude of vibration. A soil propagation model is proposed which will allow the use of site-specific, measurable, frequency ...

    • Structural Requirements of Bituminous Paving Mixtures 

      Bordea, Carmen; Năstac, Silviu (Universitatea "Dunărea de Jos" din Galați, 2002)
      In this work, the autors present some of the principal issues and challenges associated with the design and production of bituminous mixtures that can meet the ever-increasing structural needs of modern pavements.

    • The Behavior of Mechanical Model Wheel' S Loader 

      Bordea, Carmen; Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2002)
      In this work is described a dynamical model for the tire-suspension system of wheel loader. This model is based on the subdivision of the global dynamical system into its physical components: the tire, the wheel, ...

    • Response Behaves of Earthmoving Vehicle Where the Slip Ratio are Variation Linear 

      Bordea, Carmen (Universitatea "Dunărea de Jos" din Galați, 2002)
      In this paper, the autor conceptualize the loader equations of motion for dynamic analysis of traction system where the slip ratio are variation linear. The wheel loader simulation model was formulated in terms of ...

    • The Analysis of the Dynamic Response of the Hydrostatic Driving Systems in a Closed Circuit 

      Gavril, Axinti; Năstac, Silviu; Axinti, Adrian-Sorin; Potârniche, Aurora (Universitatea "Dunărea de Jos" din Galați, 2002)
      The hydrostatic actions in a closed circuit were remarked in the action of the technological equipment both for achievement of translation motions with linear hydrostatic engines with bilateral stem and for rotational ...

    • The calculation of Pressure Forces Resultant About Rotor Bearings of Volumetrical Pumps and Motors with Radial Palettes 

      Arghirescu, Cristea L. (Universitatea "Dunărea de Jos" din Galați, 2002)
      The objective of this paper refers to the presentation the calculation of pressure forces resultant about the palettes and the lateral rotor surface of volumic pumps and motors with radial palettes. This calculation is ...

    • The Dynamic Study of the Crane "MT-40" in the Process of Gyrations 

      Anghelache, Diana (Universitatea "Dunărea de Jos" din Galați, 2002)
      This work proposes the determination of the dynamic behavior of a tower crane in the process of gyration in sight of a move burdens in the most disadvantageous conditions and namely: in the crane’ s hook it is a solid body ...

    • Modeling the Dynamic Behavior of the Supercharger Units of Supercharged Diesel Engines 

      Burciu, Mugurel (Universitatea "Dunărea de Jos" din Galați, 2013)
      The paper preseflts the sintulation of the dynamic behavior of the supe.rcharger group with free rotatiott, using diJfere,tial equatiotts. The model is based on working knowledge of static characteiistics of the supercharge ...

    • Algorithms for Objects' Shape Recognition and Measurement Before Gripping 

      Srarețu, Ionel; Itu, Alexandru (Universitatea "Dunărea de Jos" din Galați, 2011)
      The paper proposes an algorithmic methodology to solve a necessary first step, namely visualization, recognition and measurement of objects, for gripping, in particular by means of anthropomorphic grippers for robots. ...

    • A Combined Method for Dimensioning Mechanisms Operated with Hydraulic Cylinders 

      Hauk, Niculai (Universitatea "Dunărea de Jos" din Galați, 2011)
      This paper presents a method of synthesis of a mechanism used in ship steering systems. The case examines the use of force as elements of hydraulic differential cylinders articulated at both ends. Sizing the difficulty ...

    • Methods for Generating Mesh Surfaces Using CAD Systems 

      Haraga, Georgeta; Ghelase, Daniela; Dașchievici, Luiza (Universitatea "Dunărea de Jos" din Galați, 2011)
      One of the most popular graphic software in CAD systems is AutoCAD that is used frequently by a very great number of users thanks to its numerous advantages. In this paper we present several methods to create mesh surfaces ...

    • 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. ...

    • Dynamic Calculation of the Mechanical Transmissions with Gears and Elastic Shafts 

      Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2011)
      This study presents the elaboration of the physical and mathematical dynamic models of the mechanical systems with elastic shafts and discrete mass elements subjected to dynamical loads, taking into consideration ...

    • Modal Damping Ratio Calculation for Finited of Mechanical Systems with Viscous Elastic Bearings Using Virtual Instrumentation 

      Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2011)
      This paper proposes an approach of a finite DOF dynamic model for the rigid-solid with multiple neoprene apparatus bearings modeled as viscous elastic dampers. After a short presentation of the physical model of the solid ...

    • The Role of Reinforcement Learning Business Integrated Manufacturing 

      Dașchievici, Luiza; Ghelase, Daniela (Universitatea "Dunărea de Jos" din Galați, 2011)
      Reinforcement learning (RL) has received some attention in recent years from researchers, because it deals with the problem of how an autonomous manufacturing system can learn to select proper actions for achieving its ...

    • About the Hysteresis-Loop of the Mechanical Oscillators 

      Cauteș, Gheorghe (Universitaea "Dunărea de Jos" din Galați, 2011)
      The work presents firstly the representation of the typical Hysteresis-loop as function between the indoor forces of the oscillator as friction and elastic forces dependant on displacement and, otherwise, as function between ...

    • Processsing and Analyzing Object Images With the view of Object Grasping 

      Starețu, Ionel; Itu, Alexandru (Universitatea "Dunărea de Jos" din Galați, 2011)
      This paper presents a solution based on image processing techniques used for analyzing images of objects which will be grasped, using existing software technologies completed with specific software modules. Digital image ...

    • Seismic Base Isolation of Structures Using Frictuon Pendulum Bearings 

      Șcheaua, Fănel (Universitatea 'Dunărea de Jos" din Galați, 2011)
      Base isolation systems have become a significant element to enhance reliability during an earthquake. One type of base isolation system is Friction Pendulum Bearing in which the superstructure is isolated from the foundation ...

    • Damage Detection at Vibration Passive Isolation Devices 

      Năstac, Silviu; Leopa, Adrian (Universitatea "Dunărea de Jos" din Galați, 2011)
      This paper deals with some theoretical aspects combined with experimental tests regarding early damage identification in vibroisolation devices. This study was a natural fall-back of an analysis regarding the behaviour ...

    • Structural and Kinematic Analysis of Planetary Gearings 

      Naidin, Gigi (Universitatea "Dunărea de Jos" din Galați, 2011)
      By bounding two or more gearings, using a role bear-axle element, we can obtain simple transmissions with caged wheels. A transmission with gear wheels generally has, an axle of fixed rotation, called main axle. The gear ...