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ABSTRACT
Like elastic solids, all industrial structures and installations are subjected to vibrations, either the ones they generate ( oscillating internal force produced by the unbalance of a rotating shaft, the interaction of gear teeth, etc.) or the ones they are subjected to due to their environment (external oscillating force produced by an adjacent engine, the bearing of a pipe, etc.). This article provides a qualitative description of the main vibratory phenomena, their propagation and attenuation. It then focuses on the disruptions caused; in certain cases the effects can be positive. It also presents certain notions of acoustics which allow for the providing of solutions to noise nuisances induced by the vibrations of industrial structures.
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Bernard GARNIER: Civil engineer from the École nationale des ponts et chaussées - Technical Operations Director at THALES Underwater Systems
INTRODUCTION
All industrial structures and installations are subject to vibration, whether generated by themselves or by their environment.
The aim of this article is to give a qualitative description of the main vibratory phenomena. The paragraph 4 provides some basic acoustics for dealing with the problems of noise disturbance induced by the vibration of industrial structures.
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Vibration of industrial structures
A little physics, and a few definitions
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Bibliography
Norms and standards (non-exhaustive list)
The Association française de normalisation (AFNOR) provides French and foreign standards.
French standards (AFNOR and UTE – Union technique de l'électricité) may or may not correspond to ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) standards. The degree of conformity, which is specified, is: identical, equivalent...
Regulations (non-exhaustive list)
Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast) (OJ L. 157 of 9 June 2006, pp. 24-86)
Directive 98/37/EC of the European Parliament and of the Council of 22 June 1998 on the approximation of the laws of the Member States relating to machinery (OJ L. 207, 23 July 1998, pp. 1-46).
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