Topics

3 days

Visit to the Cambrai manufacturing workshops ( 1/2 day - subject to prior acceptance for non-competition)

Denain Foundry and Steelworks or CMD Cambrai

V2 courses (or equivalent)

• To learn about gear technology and sizing
• To learn about failure modes and associated symptoms
• To acquire the technique of advanced diagnoses on gear transmissions, by means of vibration, electrical and tachometric analyses

Mechanical services personnel familiar with vibration diagnoses and wishing to improve their expertise in gear diagnoses.

• Technology and sizing of gears led by FERRY CAPITAIN
• Failure modes
• Typology of gears in good condition
• Typology of damage or malfunctions
• Advanced signal processing techniques applied to mesh diagnoses
• Study of torque fluctuations by electrical and tachometric analyses
• Typological indicators specific to the monitoring and diagnosis of gear transmission systems
• Implementation of measurement and analysis techniques on the FERRY CAPITAIN gear educational test bench

Participants can bring their own case studies if they wish

OPTION: visit to the CMD workshops in Cambrai: Campagnie Engrenages et Réducteurs Messian Durand. This historic factory has very advanced tools and technology for large gears.

• Additional expertise of a manufacturer and a diagnosis expert
• Practical work on FERRY CAPITAIN gear test bench
• Very advanced case studies on the subject of gears

Training given in association with FERRY CAPITAIN

3 days

V2 courses (or equivalent)

• To learn about the causes and remedies of torsional vibrations of shaft lines
• To learn how to measure and analyse instantaneous rotation speed signals, torque fluctuations, and motor current modulations for generators as diagnosis tools

Mechanical services personnel familiar with vibration diagnioses and wishing to improve their expertise in the field of diagnosing phenomena generating torsional vibrations or torque fluctuations.

• Diagnosis of faults inducing torque and speed fluctuations: backlash, regulation faults, roto bars, coupling faults, cardans, torsional resonance, etc.
• Advanced techniques for processing this type of signal
• Definition and implementation of monitoring indicators

• Dynae is a pioneer in these techniques and has developed dedicated tools
• Expert training with advanced theoretical aspect
• Highly specialised case studies on torsional vibrations

2 days

Advanced vibration analysis (1 day)

• Rotor dynamics: modal behaviour, influence of the bearing and the oil film, rotational and precession movements, critical speeds
• Signal processing in transient mode
• Symptomatic vibratory typologies of faults

SAMR workshop (Troyes)

Vi, VD or V1, V2 courses

• Know the technology and sizing of plain bearings
• Understand the operation and dynamic behaviour of machines on fluid, hydrostatic and hydrodynamic bearings
• Carry out the diagnosis by means of vibration analysis of machines on fluid bearings

Staff with a good knowledge of vibration diagnoses.

 Bearing technology part handled by SAMR.

• History
• Principle
• The various types of bearings
• Calculating a bearing
• Fitting a bearing
• Causes and mechanisms of failure

Vibration analysis part handled by Dynae.

• Norms and standards
• Symptomatic vibratory typologies of common faults encountered
• Measurement chains and monitoring systems with displacement probes
• Signal processing in steady state

• Complementarity of the technological aspect handled by SAMR and the vibratory behaviour handled by Dynae.
• Visual analysis of shells with faults.

3 days

CERG Grenoble (Le Pont de Claix)

Knowledge of vibration measurement

• Understand the mechanisms influencing the noise and vibrations of hydraulic & aeraulic circuits, reactors, furnaces, boilers, etc.
• Know how to diagnose the causes thereof, assess the risks, design.

Staff in charge of studying the design of this equipment, monitoring or maintaining it: engineering firms, design offices, static inspection departments, maintenance departments.

• Basic fluid mechanics reminders
• Noise and vibration reminders
• Sources of excitation linked to rotating machines, flows, wave propagation ... Physical phenomenon, methods of diagnosis and correction at the source
• Risk and nuisance assessment
• Noise and vibration reduction methods: cowling, silencer insulation, shock absorbers, etc.
• Illustrative practical work on CERG learning benches.

• Training given in association with a CERG fluid mechanics specialist
• Dedicated test benches with practical work

3 days

Knowledge of vibration measurement
Prior participation in the Vi course is recommended.

Knowing how to identify a dynamic structural problem, knowing the tools available for solving these phenomena

Design office staff, engineering firms, maintenance department.

• Dynamic variables dedicated to structure analysis and measurement: natural frequency, stiffness, damping, illustration on a system with 1 degree of freedom
• Vibration isolation: principles, traps, existing decoupling systems
• Identification of a resonance phenomenon
• Experimental modal analysis: usefulness, main principles, presentation of an exhaustive approach, identification methods

Structural changes:

• Simple modifications (addition of mass / stiffness)
• Other solutions: shock absorbers and dynamic absorbers
• Use of a finite element model: the broad outlines of a modelling, the various ways to reset a model with respect to measurements, resetting tools, applications

Case studies.

• Confrontation, practical approach and modeling
• Practical work