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Conyu Grigorov Conev and Krasimir Stoianov Davidov

References [1] Brosh J. T., Mechanical Vibration and Shock Measurements , Bruel & Kjar, 1980, 63. [2] Кирилов В. М., Основи за устройството и проектирането на стрелковото оръжие , София, ДВИ, 1975, 303. [3] Пановко Я.Г., Основы прикладной теории колебаний и удара, Ленинград, масиностроене, 1976, 120. [4] Монтгомери Д.К., Планирование експеримента и анализ данных , Ленинград, Судостроене, 1980, 30.

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Alin-Constantin Sava, Ioan-Liviu Piticari, Diana-Georgeta Nistoran and Cristian-Emil Moldoveanu

References [1] *** Rheinmetall Handbook on Weaponry , Dusseldorf, 1982 [2] Roşca Aurel, Automatic weapons – The resultant vibration of the barrel. The influence on the firing precision , Military Technical Academy Press House, Bucharest, 2002 [3] Piersol Allan and Paez Thomas, Harris’ Shock and vibration Handbook , 6 th edition, McGraw Hill Handbooks, 2009

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Richard A. Epstein

, the nuisance law hones in on pollutants, noises, vibrations, odors and similar invasions. There is an inveterate tendency, even among private law scholars, to claim that the principles of nuisance law are muddy and indeterminate, See the sources cited by Justice Blackmun in Lucas , 505 U.S. at 1055 n.19 (Blackmun, J. dissenting) (“There is perhaps no more impenetrable jungle in the entire law than that which surrounds the word ‘nuisance.’ It has meant all things to all people, and has been applied indiscriminately to everything from an alarming advertisement to a

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Peter H. Huang

geometry, partial differential equations, several complex variables, and Fourier analysis, which is the study of how complicated vibrations can be decomposed, represented, or approximated by sums of simpler trigonometric functions. He offered an example of what Fourier analysis is about by explaining how the complicated motion of a violin string consists of a fundamental note, a first overtone, a second overtone, and so forth. He observed that instead of him choosing problems to work on, problems effectively chose him to be worked upon in the sense that he could not

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Cornel Haţiegan, Gilbert Rainer Gillich, Gheorghe Popovici and Luminita Haţiegan

References [1] Cornel Haţiegan, Edwald-Viktor Gillich, Ovidiu Vasile, Marian-Dumitru Nedeloni, Ioan Pădureanu, Finite Element Analysis of thin plates clamped on the rim of different geometric forms. Part I: Simulating the Vibration Mode Shapes and Natural Frequencies, Romanian Journal of Acoustics & Vibration, Vol.XII, No.1, 2015. [2] Cornel Haţiegan, Edwald-Viktor Gillich, Ovidiu Vasile, Marian-Dumitru Nedeloni, Marcel Jurcu, Petru Magheţi, Finite Element Analysis of thin plates clamped on the rim of different geometric forms

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Svilen Spirdonov and Svilen Stefanov

Abstract

The following report shows methods for determination of the coefficients of stiffness and damping, for softening the vibrations, which ensue in an armoured vehicle’s suspension from the shooting of a mounted machine-gun. The methods are based on a model of the movement smoothness, in which is additionally included the signal of the machine gun’s recoil.

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Galina Ivanova

References [1]. Bulgarian Standard БДС EN 60068-2-6:2007. Environmental Testing. Part 2-6: Tests. Test Fc: Vibration (Sinusoidal). [2]. Petkov, B. M. Artillery Fuzes. Theory, Estimate and Structures. Saint George MoD Publishing House, Sofia, 1994.

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Cornel Haţiegan, Mihaela Molnar, Sorin Trocaru, Ioan Pădureanu, Marcel Romulus Jurcu, Lidia Filip Nedeloni and Florin Ilie

Abstract

This paper presents thermal analysis with finite elements for a plate of steel covered on the surface with a thin layer of Teflon. There is the possibility of identification of that part responsible for beginning of the thermal degradation using the vibrational model. The thermal analysis with finite elements made with ANSYS program enables monitoring and determination of plate variation of temperature. This variation of temperature could cause significant changes in guided wave propagation.

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Ioan Virca

Abstract

The use and maintenance of technical systems throughout their lifecycle aims at achieving goals that allow for high values of productivity and availability characteristics of these systems. In the economic policy of each state or private organization or state institution, there is the right to determine the type of adequate maintenance system within the maintenance strategy adopted. Thus, the types of maintenance systems recognized in the technical domain are analyzed from the point of view of the two previously-mentioned features, productivity and availability, thus making the predictive maintenance system, derived from the preventively-planned one, advantageous for all organizations. It is obvious that the current trend is to spread this predictive maintenance system, according to which the interventions will be carried out before the malfunction occurs, depending on the periodically measured values of global pressure, flow, energy consumption, temperature, current, voltage, vibrations, etc.

Open access

Vasile Nastaiescu and Vlad-Andrei Barsan

References [1] Hallquist, O. John, LS-DYNA Theory Manual, Livermore, California 94551, 2006, [2] Liu, L., Chua, L.P., Ghista, D.N., Element-free Galerkin Method for Static and Dynamic Analysis of Spatial Shell Structures, Journal of Sound and Vibration 295 (2006) 388-406, www.elsevier.com/locate/jsvi [3] Liu, G.R., Gu, Y.T., An Introduction to Meshfree Methods and Their Programming, Published by Springer, P.O. Box 17, 3300 AA Dordrecht, The Netherlands, 2005 [4] Năstăsescu, V., Ştefan, A., Lupoiu