Surveillance et diagnostic vibratoire des machines (ISO AFNOR/E90D)Maintenance (GSI)

Many years have passed since the publication of the Rathborne Severity Charter in 1939, revealing the maximum level of vibration that can be tolerated on a given type of material, but the measurement of vibrations on rotating machines remains a topical issue. This topic is even of particular importance today as it plays a key role in maintenance programmes aimed at increasing international competitiveness.

All rotating machines are vibrating. When these vibrations are too high, they often cause a feeling of anxiety among those responsible for the machines, since they probably announce an unexpected stop or break, in short, an event whose consequences would almost certainly lead to a significant loss of productivity and/or damage to the safety of neighbouring personnel. With the current trend of manufacturers to design and manufacture increasingly small and fast machines, knowledge of dynamic behaviour is often essential to the proper functioning of the machine. machine.

The language of vibrations on rotating machines is a bit complex as it requires an understanding of the dynamic behaviour of machines as well as the concepts of signal processing and statistics. This science has developed a little faster over the last twenty years, mainly because of the growing interest of industrialists in ensuring greater reliability of their rotating machines. It is certainly not without reason that this progress has been made because, according to the statistics (resulting from observations over 25 years), every dollar invested in this area reports at least two to three times the reduction in maintenance costs and more than ten times the increase in productivity. Every year, new diagnostic techniques are emerging, promising better results. Although the subject is constantly evolving and much remains to be discovered, several techniques remain. who are available today and have without a doubt demonstrated their effectiveness in the past are still not known to the majority of people who could benefit from it.

The aim of this course is therefore to fill this lack of information by providing you students engineers of the PMFSI option of the INSA Centre Val de Loire with fundamental concepts on the subject through theoretical presentations and practical applications.

Vibration of machines, this is a great theme very often dealt with but most often on a specific field: reliability calculation, operation management or even non-destructive testing.

This course presents the originality of covering all these themes by presenting the fundamental concepts concerning:

• the organisation and management of maintenance,
• the use of machine vibrations as a predictive maintenance tool.

This course is intended for students in the 5th year of the PMFSI option of the INSA Centre Val de Loire on the Campus of Blois.

The evaluation will be carried out through a course completion (TC) review, a documented paper and report of both TP sessions and the project.

At the end of each chapter, the reader interested in a specific subject will find references to the various books and publications used to document this course.