Abstract:  Tuned Vibration Absorber has been invented since 1900s. It is mainly composed of a mass, a spring and a damper and has a great effect in suppressing vibrations of machines and structures. However, this absorber allows vibration mitigation for a narrow frequency band. It has been shown that the nonlinear vibration absorber incorporating a nonlinear coupling spring element could offer performance advantages in a large frequency range. The objective of this presentation is to show through simulation and experience the efficiency of such non linear absorber. Simulations will be done using novel techniques based on Asymptotic Numerical Method (ANM). A case study of milling machine will be detailed at the end of the presentation.

 

Mohamed HADDAR is a full professor at National Engineering School of Sfax since 1994. He is the head of The Laboratory of Mechanics Modeling and Production. His research activities focus on Dynamic behavior and Vibro-acoustic of machines and structures, Mechanical behavior of materials and structures and Production and design and operation of systems. Professor Mohamed Haddar is involved in several research projects that are focused on dynamics of rotating machines elements like projects with IST-CTN research group of Professor Jose Antunes, University of Cantabria in Spain (Professor Fernando Viadero Rueda), University of Compiègne ( Professor Mabrouk Ben Tahar). ..

Professor Haddar authored more than two hundred papers. He is co-editor of a book series with Springer "Applied Condition Monitoring" under which he edited several conference proceedings. He was guest editor in special issues of Applied Acoustics, European Journal of Computational Mechanics and Mechanics and Industry journals. He is vice president of Tunisian Society of Industrial Acoustics and Vibration (ATAVI) and vice president of Tunisian Society of Mechanics (ATM)