Căutare după Autor "dd9d1a4d-b232-4ffd-bd49-42b8ae7f7298"
Afișează articolele 1-20 of 20
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Aspects Regarding the Dynamics of the Vibrating Conveyors Modeled as 3DOF Elastic Systems
Drăgan, Nicușor (Universitatea "Dunărea de Jos " din Galați, 2012)The paper proposes an approach of a 3DOF (3 Degree Of Freedom) dynamic model for the vibrating conveyors, with the purpose of determining the trajectories of the points which belong to the organ to work (transport, sort ... -
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 ... -
Considerations on the Nonlinearity Grade of the Nonlinear Mechanical Elastic Systems
Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2012)The article is taking into consideration a nonlinear model for the damping, where the damping coefficient has a polynomial variation function of the velocity. The differential equation of the movements of the non-linear 1DOF ... -
Dynamic Analysis of Mechanical Systems. Calculus of the Equivalent Dynamic Forces and Torques
Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2008)This article presents the physical and mathematical models of mechanical systems with elastical and/or rigid elements, subjected to dynamical loads: forces and torques. The aim of the study is to establish some formulas ... -
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 ... -
Engineering and Creativity. Romanian Policy Regarding Innovation and Scientific Research Devalopment
Drăgan, Nicușor (Univerisitatea "Dunărea de Jos " din Galați, 2010)The goal of Lisbon Agenda is to make the EU "the most dynamic and competitive knowledge-based economy in the world, capable of sustainable economic growth improving skiels for more and better jobs and greater social ... -
Experimental Researches on the Sound Absorption Composites Used for Public Worket Equipment
Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2010)Decreasing of sound and vibration global level inside and/or outside the public works equipment’s cabin as well as the reduction the noise pollution or the pollution accounted by the vibration and mechanical shocks on ... -
Instrumental Analysis of the Reinforced Concrete Bridges Subjected to Dynamic Forced from the Traffic
Drăgan, Nicușor (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 ... -
Measuring and Controlling of Noises and Vibrations Generated by Industrial Sources
Drăgan, Nicușor; Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2008)This paper describes a methodology for measuring and control of noises and vibrations generated by industrial sources, such as: construction activities, equipments which use vibrations into working process, etc. ... -
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 ... -
Researches on the Acoustic Treatments with Composite Materials Panels at the Frontal Loader MMT45
Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2012)The article presents the problem of the testing of some protective systems made of PU foam based composite materials which can simultaneously meet the following requirements: noise absorption for middle and high range ... -
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 -
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, ... -
The Calculus of the Equivalent Rigidity Coefficients for the Shafts of the Elastical Systems
Drăgan, Nicușor; Potârniche, Aurora (Universitatea "Dunărea de Jos" din Galați, 2008)The components of the mechanical systems like machines and/or technological equipment have a certain elasticity or rigidity. Knowing the rigidity of each component is very important for the studies whose goal is to ... -
The Dynamic Analysis of the Inrtial Vibrating Screens Modeled as 3DOF Elastic Systems
Drăgan, Nicușor (Universitatea "Dunărea de Jos" din Galați, 2012)The paper proposes an approach of a 3DOF (3 Degree Of Freedom) dynamic model for the vibrating screens, with the purpose of determining some impartial criteria for the appreciation of dynamic characteristics of the ... -
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 Dynamics Analysis of the Forced Steady-State for the Vertical Towers Chillers with Internal Axial Flow Fan
Drăgan, Nicușor; Debeleac, Carmen (Universitatea "dunărea de Jos" din Galați, 2003)This study presents some of the phases of the physical and mathematical models' elaboration of the vertical tower chillers with a single axial flow fan, which are used in social and civil buildings to prepare conditioning air ... -
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 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 ... -
Theoretical and Numerical Considerations on the Composite Neoprene Used at Vibration and Shock Isolation Isolators
Bratu, Polidor; Drăgan, Nicușor (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 ...