Buscar
Mostrando ítems 1-10 de 18
Evaluating Methods of Whole-Body-Vibration Exposure in Trains
(Universitatea "Dunărea de Jos" din Galați, 2010)
This paper studies the whole-body vibration in trains which constitutes one aspect of the physical environment that can cause discomfort to passengers. Modern methods of assessment use digital techniques. Accelerometers ...
On the Product-Time and Cost Estimation in the Market-Manufacturing System
(Universitatea "Dunărea de Jos" din Galați, 2010)
This paper presents a product time and cost estimation method taking account the market dynamics and manufacturing system competitiveness. The method is based on the behavioral modeling using on-line unsupervised learning. ...
Coandă Effect Used to Improve the Efficiency of a Rotary Wing Aircraft
(Universitatea "Dunărea de Jos" din Galați, 2010)
Coandă effect is a well-known fluid mechanics phenomenon in which a jet flow attaches itself to a nearby surface and remains attached even when the surface bends away from the initial jet direction and the jet is deflected ...
A Study of Body Posture on Human Comfort Under the Influence of Whole-Body Vibrations for the Rail Passengers
(Universitatea "Dunărea de Jos" din Galați, 2010)
When traveling by train, passengers are exposed to vibration. A well designed seat will attenuate the vibration path to the person in the frequency region where it is the most perceptible, between 3 and 10 Hz. This paper ...
Considetations on Using the Virtual Instruments for the Acquisition and Analysis of Experimental Data from Dynamic Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)
The new slogan “The software is the tool” takes into consideration a new construction principle for the measuring tools and systems, with a brand new architecture. These systems and tools are assembled into a “virtual ...
Seismic Protection of Structures Using Hydraulic Damper Devices
(Universitatea "Dunărea de Jos" din Galați, 2010)
In recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of structures. Structural control in civil ...
Muffler Performances Modeling with Boundary Element - Method and Experimental Study
(Universitatea "Dunărea de Jos" din Galați, 2010)
This paper investigates the acoustic performance of a reactive silencer using Boundary Element Method analysis and experimental techniques. This analysis addresses a research topic of major interest today on how to reduce ...
The Influence of Nonlinear the Elastic Character of Viscoelastic Systems on the Dynamic Response of Mechanical Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)
Bridges and viaducts represent vital engineering structures which are component of terrestrial communication lines, therefore reducing their exposure to factor originating from natural or anthropogenic hazards has no ...
Dynamical Response Analysis of a System with one Degree of Freedom Stresses by the Different Pulse Excitation Functions
(Univeritatea "Dunărea de Jos" din Galați, 2010)
Viscoelastic systems embedded in structures such as bridges are subject to various dynamic loading from traffic. A dynamic study of these structures requires more accurate definition of disturbance function parameters: ...
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 ...