Căutare 1995-2015 după Data publicării
Afișează articolele 161-180 of 326
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A Method Used to Determin the Power Necessary for Hydraulic Excavators
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper presents a method of verification in the design phase, the mechanical power necessary involvement hydraulic pumps for excavators with bucket reverse.Because, in the design phase the digging forces are not ... -
Study on the influence of Sonic Generator Geometry on Acoustic Parameters
(Universitatea "Dunărea de Jos" din Galați, 2010)The acoustical parameters, dimensional determination and construction of sonic generator is described in the paper. The generator’s dimensional determination and construction show that the nozzle slot, the axial resonator ... -
Assembly Modeling Using Catia System
(Universitatea "Dunărea de Jos" din Galați, 2010)CATIA is one of the most performance graphics programs that has been created for the production of technical drawings in the 2d and 3d with a high precision. In this paper, we have presented a simple assembly that is a ... -
Modal Calculus of the Reinforced Concrete Bridges Modeled as a Rigid Solid Beared on Viscous Elastic Neoprene Supports
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper proposes an approach of a six degree dynamic model of a rigidsolid with some types of symmetries. These symmetries lead to simplified mathematical models, which are more easily to solve. If the rigid-solid is ... -
Theoretical and Numerical Considerations on the Composite Neoprene Used at Vibration and Shock Isolation Isolators
(Universitatea "Dunarea de Jos" din Galați, 2010)Construction of passive insulation elements in neoprene single microstructure mixture has demonstrated that the isolators can have the necessary elastic characteristics but low internal damping. The reduced scale models ... -
Calculation Method of Straight Unsupported (Freely Deformable) Bars Subjected to in Plane Bending Stress
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper describes a method of determining the cross section arrows and rotations of a straight unsupported bar subjected to bending stress. The straight bar is in a state of static balance while subjected to external ... -
Instrumental Analysis of the Reinforced Concrete Bridges Subjected to Dynamic Forced from the Traffic
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper proposes an approach of the experimental study of the dynamics of a reinforced concrete bridge made by a number of twenty U beams and beared by eighty identical neoprene supports (four bearings for each concrete ... -
On the Efficiency of Compacting Equipment
(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 ... -
The Undissolved Air Influences on Dynamic Behavior of Hydraulic Driving Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper is a part of a group of papers which deal with the changes due to the oil - air mixture into the hydraulic actuating systems. The undissolved air into the hydraulic agent of technological equipment actuating ... -
Considerations on the Non-Linear Modelling of the Dynamics of the Vibration and Shock Isolators Made from Composite Neoprene
(Universitatea "Dunărea de Jos" din Galați, 2010)This study presents the results of theoretical and experimental researches and numerical modeling for some composite material structures of neoprene used to manufacture the viscous-elastic supports of the technological ... -
Some Aspects of the Calculation of Beams Loaded with Mobile Forces with Variable Intensity
(Universitatea "Dunărea de Jos" din Galați, 2010)In this article is presented the case of the beams which are loaded by mobile forces with variable intensity along the beam. In this context, after calculus assumptions and calculus model are presented, necessary formulas ... -
On the Correction Factor for Calibration of the Flowemeters with Axial Turbine
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper refers to axial turbine flowmeters used for technical measurements of volumetric flows at hydraulic driving systems. This study demonstrates that volumetric flow through the transducer has proportional value ... -
Influence of Geometric Parameters on Forces in Single Point Incremental Forming Process for Various Parts
(Universitatea "Dunărea de Jos" din Galați, 2011)The purpose of this study was to investigate the influence of geometrical parameters on the forces in two directions in a single point incremental forming process. For this purpose, the authors have chosen three types ... -
The Role of Reinforcement Learning Business Integrated Manufacturing
(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 ... -
Solution for Energy consumption Uniformity at Single Bucket Excavators
(Universitatea "Dunărea de Jos"din Galați, 2011)This paper presents a possible technical solution for energy consumption uniformity at single bucket excavators. The basics of this proposed solution consist of energy inertially stocked up and the proper way to implement ... -
Modal Damping Ratio Calculation for Finited of Mechanical Systems with Viscous Elastic Bearings Using Virtual Instrumentation
(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 ... -
Pulsatory Phenomenon in Hydrostatic Driving Systems
(Universitatea "Dunărea de Jos" din Galați, 2011)In this paper were treated and briefly presented the particular aspects related to possible dynamic unstable behaviors of flow variation into the volumetric pumps. Dynamic characteristics for transitory state working ... -
Considerations Regarding the Stability of High-Speed Shafts
(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. ... -
The Impulsive Loading Influence on Dynamic Response Parameters of the Viaduct Type Structure
(Universitatea "Dunărea de Jos" din Galați, 2011)Bridges and viaducts are vital structures ensuring ways of communication, so they must be protected from dynamic loads from traffic or seismic activity. For this reason are embedded in their structure dynamic isolation systems ... -
Dynamic Calculation of the Mechanical Transmissions with Gears and Elastic Shafts
(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 ...