Research
Research interests
My research interests focus on theoretical, experimental and numerical contributions in the field of mechanical systems and structural dynamics.
My contributions include work based on highly efficient experimental and computational methods for physics and engineering, aiming to improve the understanding of the dynamic behavior of mechanical systems in various technology fields including automotive systems and aero-engines.
My research topics fall into the following broad categories:
Applied mathematics and computational methods in mechanical engineering
Data science, uncertainties and statistical analysis for dynamical systems
Nonlinear vibrations
Noise and friction-induced vibration
Damage detection and structural health monitoring
Rotordynamics
Some illustations can be found here.
Nonlinear vibrations :
Complex structures with localised nonlinearities
Nonlinear methods for calculating the transient or/and quasi-periodic responses of nonlinear mechanical systems
Modeling of localized nonlinearities (friction interface, bolted junction, contact, elastomer, breathing crack,...)
Efficient modal reduction in non-linear dynamics
Uncertainty effects on the variability of the nonlinear responses in mechanical systems
Correlation between experiments and numerical analysis
Noise and friction-induced vibration :
Stability and bifurcations of solutions
Non-linear analysis for mechanical systems subjected to friction-induced vibration and noise
Solving processes for investigation of the nonlinear transient and stationary behaviors of mechanical systems
Numerical methods for calculating squeal noise and acoustic radiation
Modeling of contact interaction with friction
Modal reduction for structures with frictional interfaces
Uncertainty effects on the variability of the stability and nonlinear responses
Correlation between experiments and numerical analysis
Structural health monitoring:
Modeling of crack and breathing behavior
Linear and non linear approaches for crack detection and identification in fixed and rotating systems
Vibration analysis of fixed and rotating systems with breathing crack
Experimental tests for crack detection in rotating systems
Rotordynamics :
Modeling of rotating machinery
Multi-faults (such as unbalance, asymmetric shaft, bow, parallel and angular misalignments, ...)
Instabilities
Reduced-order models
Nonlinear vibration for mono and multi-excitations
Uncertainty modeling and stochastic process in linear or nonlinear rotor systems
Correlation between experiments and numerical analysis
Applications :
Brake systems (automotive, railway, aircraft,...), clutch, wipers,...
Transport
Turbomachinery
Aerospace
Aeronautics
Civil engineering
...
Experimental bench FIVE@ECL
Since 2015, design of a new experimental test bench, called Friction-Induced Vibration and noisE at Ecole Centrale Lyon (FIVE@ECL), has been developped by the research group "Nonlinear Dynamics, Uncertainties, Mechanical Systems with Interfaces".
Financial supports from Institut Universitaire de France (IUF) and Institut Carnot Ingénierie@Lyon.
To be noted for the scientific community in the field of friction-induced noise and vibration : free experimental databases are available.
Contact me for more information: jean-jacques.sinou@ec-lyon.fr
Experimental studies for different configrations of brake system are under studied and some of the open issues in understanding squealing disc brakes are ongoing :
Experimental studies for different configurations of brake system and various operating conditions
Noise generation and suppression in brake part design
Correlations with numerical simulations based on finite element models
Studies of the contributions of each of the components depending on the squealing frequency of interest
Detection of the distinct frequencies and the amplitude of vibration of squealing brake
Links between the vibration of a squealing disc brake assembly and the squeal noise
Developments of some specific experimental tests for friction-induced vibration and noise prediction
...
J-J. Sinou, D. Lenoir, S. Besset and F. Gillot, Squeal analysis based on the laboratory experimental Bench "Friction-Induced Vibration and noisE at Ecole Centrale de Lyon" (FIVE@ECL), Mechanical Systems and Signal Processing, 119, 561-588, 2019. doi.org/10.1016/j.ymssp.2018.07.006
J-J. Sinou, D. Lenoir, S. Besset and F. Gillot, Dataset of vibrational and acoustic measurements for squeal analysis from the laboratory brake setup Friction-Induced Vibration and noisE at Ecole Centrale de Lyon (FIVE@ECL) , Data In Brief, 21, 639-643, 2018. doi.org/10.1016/j.dib.2018.09.083
D. Lenoir, S. Besset, and J-J. Sinou, Transient vibro-acoustic analysis of squeal events based on the experimental bench FIVE@ECL, Applied Acoustics, 165, 107286, 2020. doi.org/10.1016/j.apacoust.2020.107286
J-J. Sinou, S. Besset and D. Lenoir, Some unexpected thermal effects on squeal events observed on the experimental bench FIVE@ECL, Mechanical Systems and Signal Processing, 160, 107867, 2021. doi.org/10.1016/j.ymssp.2021.107867
Download free datasets
Free datasets for Friction-Induced Vibration and noisE are available:
J-J. Sinou, D. Lenoir, S. Besset and F. Gillot, Dataset of vibrational and acoustic measurements for squeal analysis from the laboratory brake setup Friction-Induced Vibration and noisE at Ecole Centrale de Lyon (FIVE@ECL) , Data In Brief, 21, 639-643, 2018. doi.org/10.1016/j.dib.2018.09.083
Free datasets for the experimental CEA-beam benchmark structure are available:
S. Talik, M. Claeys, J-P. Lambelin, A. Banvillet, J-J. Sinou, Jean-Jacques (2022), Dataset of measurements for the CEA-beam system subjected to two correlated or uncorrelated broadband random excitations, Mendeley Data, 2022, doi.org/10.17632/8bs26jgxv6.1
S. Talik, M. Claeys, J.P. Lambelin, A. Banvillet, J.-J. Sinou, Updating dataset of measurements for the experimental CEA-beam benchmark structure subjected to one stochastic broadband excitation with dataset of measurements for the CEA-beam system subjected to two correlated or uncorrelated broadband random excitations, Data in Brief, 108448, 2022. doi.org/10.1016/j.dib.2022.108448
M. Claeys, J-P. Lambelin, Y. Chatereau J-J. Sinou, Dataset of multi-harmonic measurements for the experimental CEA-beam benchmark structure, Data In Brief, 27, 104563, 1-6, 2019. doi.org/10.1016/j.dib.2019.104563
T. Roncen, J-P. Lambelin, Y. Chantereau and J-J. Sinou, Dataset of measurements for the experimental CEA-beam benchmark structure subjected to one stochastic broadband excitation, Data In Brief, 35, 106798, 2021. doi.org/10.1016/j.dib.2021.106798
Research group "Nonlinear Dynamics, Uncertainties, Mechanical Systems with Interfaces"
Overview
The research group "Nonlinear Dynamics, Uncertainties, Mechanical Systems with Interfaces" (Laboratory of Tribology and Dynamics of Systems UMR CNRS 5513) is focused broadly on mechanical science and technology in order to conduct specific research and investigations into vibration problems for industry as well as the public sector. Research interests focus on theoretical, experimental as well as numerical contributions.
We are committed to realizing our research program through studies currently focused on five major areas:
Uncertainty effects on the variability of the nonlinear vibrations of complex structures with localised nonlinearities
Noise and friction-induced vibrations with application to brake squeal
Finite element modeling and numerical simulations of nonlinear vibrations
Modal reduction for complex structures with localized nonlinearities
Efficient optimization design method for the prediction of nonlinear vibrations
People - permanent researchers and faculty members
The research group "Nonlinear Dynamics, Uncertainties, Mechanical Systems with Interfaces" includes a number of permanent researchers and faculty members and often involves PhD-students and post-doctoral researchers.