Căutare 1995-2015 după Data publicării
Afișează articolele 41-60 of 326
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The Model of the Forging Hammers Like System with three Degree of Freedom
(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 ... -
Elastic System Designed for Base Insulation Against Dynamic Action of Vibrations and Seism
(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 ... -
About Concrete Consolidation and Vibration
(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 ... -
Dynamic Analyze for the Chassis-Cab System Having Elastic Intermediate Link (Elastic Interface)
(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 ... -
3D Modelling Multiple Faucets Bodies
(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 ... -
Research Regarding the Investigation of Steel Hardness
(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
(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 ... -
Analitical evaluation of the Dynamic Performances for the Wheel Loader Analysis
(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 ... -
The Coefficient of Restitution in the Plastic Deformation Process
(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
(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 ... -
The influence of the Rolling track on the Dynamic Comportment of the equipement on tyres
(Universitatea "Dunărea de Jos" din Galați, 2005)The paper presents aspects connected to the comportment of the vehicle on wheels which moves on dislevement soil. A complete dynamic model is realized for a vehicle on wheels with tyres, which wheels are rigidly tied to ... -
Experimental-Computational Determination of Epoxy Resin mechanical Properties, used in Assembly Applications
(Universitatea "Dunărea de Jos" din Galați, 2005)A wide use of adhesive substances and especially of epoxy resins in metal structures with elevated strength is registered during the last years. Epoxy resins possess enhanced mechanical, chemical and physical properties, ... -
Simulation of Dynamical Systems with Linear and Non-Linear Behavior in Scicos Environment
(Universitatea "Dunărea de Jos" din Galați, 2005)The paper presents the SCICOS program and the way how to formalise dynamic system with known physical and mathematical models in this environment. Using simple examples from the field of vibrations, it is shown how “continuous ... -
Computational Dynamics of the Elastic Antivibrational Systems with Non-Linear Stiffness
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper the author present a set of mathematical models, usable to simulate and analyse the static and dynamic behaviour aspects, both for the passive antivibrational and anti-seismical systems, and for all the ... -
Study about Dynamic Behavior of Suspended Sieve to Machine of Sorted Self-Propelled KT 45/18/13
(Universitatea "Dunărea de Jos" din Galați, 2006)In his work studied machine of sorted self-propelled KT 45/18/13. This is a made in product brand name Romania S. C. RALLY-BM. Com. Srl and is used-up for the assortment through material vibrations of grain miscellaneous ... -
Dynamical Characterization Behavior of Machine Foundation whit Percussion Stresses Applied
(Universitatea "Dunărea de Jos" din Galați, 2006)This paper presents a dynamical analyze on the foundation of machine when are apply stresses such the beat (percussion). In this way can be evaluate dynamical response of the structure, in our case foundation of machines, ... -
Study of the internal Resonance of a two-Degree-of-Freedom Non-Linear Dynamic System
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper analyses a two- degree- of- freedom dynamic system, by taking into account its non- linearity. The case of the internal resonance is studied and, by local analysis, Hopf bifurcations are emphasized. Periodic ... -
Computer Symulation of the Earthmoving Machine to Pass Over Roughness Road
(Universitatea "Dunărea de Jos' din Galați, 2006)In this paper the author proposed a model for computer simulation of earthmoving machine passing over the roughness roads. It's important to know the dynamic overloads into the bucket rotation system which is frecvently ... -
Vibration Measurement Equipment
(Universitatea "Dunărea de Jos" din Galați, 2006)This paper describes the principles of operation of typical instrumentation used in the measurement of shock and vibration. It deals with the measurement of parameters which characterize the total (broad-band) signal. -
The Approximate Analytical Solutions for the Differential Equations which Desccribe Free Vibrations of Non-Linear Mechanical Systems
(Universitatea "Dunărea de Jos' din Galați, 2006)The oscillation movement of a mechanical non-linear system is not easy to solve exactly on analytical way. The approximate solutions are based on different methods and give different values with different approximation degree. ...
