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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. ...
About Non-Autonomous Vibrations of Mechanical Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)
Non-linear vibrations of mechanical systems are described by
differential equations of the second order, which are generally written
.. .
x f ( x, x,t ) 0 . In this work we study non-autonomous vibrations of
mechanical ...
Considertions on the Mechanical Vibrations of an Electronic Circuit Board
(Universitatea "Dunărea de Jos" din Galați, 2010)
The paper analyzes the dynamic stresses induced by mechanical vibrations
on an electronic circuit board, considering different study hypotheses,
resulting from real cases presented in technical texts. The corresponding
models ...
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 ...
About Phonic Isolation of the Mobile Equipment Cabin
(Universitatea "Dunărea de Jos" din Galați, 2008)
This work presents vibration absorbing and damping solutions for
operator cabin on construction equipment. Hereby, the operator cabin has
to be considered accordingly.
Vibration proof and sound proof materials applied ...
Non-Linear Dynamic Behavior of a Ball Float Valve
(Universitatea "Dunărea de Jos" din Galați, 2012)
The dynamic behavior of the spherical body floating in a liquid, part of a
ball float valve, is analyzed from the point of view of the dynamic systems
theory. The study of the motion illustrates the differences between ...
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 ...
Working Characteristics of the Special Isolation Devices Against Vibratory Actions
(Universitatea "Dunărea de Jos" din Galați, 2007)
The actual researches for finding optimal antiseismic protection solutions are
straightening to the few areas of activity: the first area of research is the base
isolation of buildings or theirs parts, against the ...
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 ...
Aspects Regarding the Vibrations of the Contacts of a compressed air Switch
(Universitatea "Dunărea de Jos" din Galați, 2007)
The paper studies the vibrations of the contacts of a compressed air
switch, by considering two models. Time variation of the elongation is
presented, as well as spectral representations determined by means of
Fourier ...