Projects

Competitive research grants

DSG DPT2MA

Deployment of Technological Platforms in Materials, Mechanics, and Ultrasonic Acoustics

Research and Innovation Project within the INSA CVL Strategic Dialogue and Management program (2021-2022)

Project description: Collaboration with GREMAN laboratory to combine passive vibration control using Nonlinear Energy Sinks (NES) with energy harvesting via a piezoelectric device. This project aims to study the ability of a nonlinear absorber coupled with a piezoelectric energy-harvesting device to reduce harmful vibrations in a primary structure while recovering energy. An experimental demonstrator is under design and development as part of a Master 2 internship.

BQR DiSPaREVMT

Semi-Passive Devices for Vibrational Energy Recovery in Rotating Machines such as Wind Turbines, based on the Energy Pumping Concept and Piezoelectricity

Research Quality Bonus (BQR) 2023-2024, INSA Centre Val de Loire

Project description: This research builds upon the DSG [DSG DPT2MA] project described above. The aim is to adapt previous results to address vibrational instabilities in rotating machines such as wind turbines. The approach combines theoretical/numerical work (development of a NES design methodology) and experimental work (laboratory experiments reproducing flutter or rotor/mass coupling instabilities, followed by control using NES).

Scientific output

• Baptiste Bergeot, and Sébastien Berger. Atténuation passive de vibrations auto-entretenues au moyen d’un absorbeur dynamique non linéaire bistable. Journées du GDR ExModeli, 2023, FEMTO-ST, Besançon, France.

CoREVE

Control and Energy Recovery from Vibrations in Wind Turbines

Awarded under the “Academic Initiative Research Projects” (APR IA) call from the Centre-Val de Loire region in July 2023, starting in early 2024

Project description: CoREVE focuses on mitigating harmful vibrations in rotating mechanical systems, with a particular application to wind turbines. Large, flexible turbine blades are prone to high-amplitude vibrations due to aerodynamic loads, which can reduce performance and cause fatigue damage. Traditional passive tuned mass dampers (TMD) are limited in handling non-stationary, multi-frequency vibrations. This project explores the use of bistable nonlinear energy absorbers (BNES) and networks of nonlinear absorbers as effective alternatives to TMDs and monostable NES. These devices can passively reduce low-amplitude vibrations across a wide frequency range. Additionally, integrating piezoelectric transducers allows the harvested vibrational energy to power sensors for structural health monitoring, potentially enhancing both vibration mitigation and energy recovery.

Scientific output

• Baptiste Bergeot and Sébastien Berger. Fast--slow analysis of passive mitigation of self-sustained oscillations by means of a bistable nonlinear energy sink. Physica D: Nonlinear Phenomena, 460:134063, 2024.
• Baptiste Bergeot, and Sébastien Berger. Passive mitigation of self-sustained oscillations by means of a bistable nonlinear energy sink: Numerical investigation and fast-slow analysis. In 11th European Nonlinear Dynamics Conference (ENOC 2024), 2024, Delft, The Netherlands.