MALACRIDA ALVES, Guilherme BALMES, Etienne
Rubber tests typically only consider the first harmonic of responses and thus ignore additional information about variation of properties during a cycle. The Payne effect is then only described as a decrease of modulus with amplitude. An harmonic modulation is introduced as a novel way to look at the classical harmonic balance characterization of p...
SHAMI, Zein Alabidin SHEN, Yichang TOUZÉ, Cyril THOMAS, Olivier GIRAUD-AUDINE, Christophe
This article considers the nonlinear dynamics of coupled oscillators featuring strong coupling in 1:2 internal resonance. In forced oscillations, this particular interaction is the source of energy exchange, leading to a particular shape of the response curves, as well as quasi-periodic responses and a saturation phenomenon. These main features are...
BOITIER, Vincent SEGUIER, Lionel HUET, Florian
This article presents the design strategy and experimental validation of a battery-free power supply for wireless sensor nodes (WSN) on an industrial study case. The power supply is based on the principle of vibration energy harvesting (VEH). The general architecture of the linear generator with electronic is presented. It is composed of commercial...
THOMAS, Olivier BENACCHIO, Simon GIRAUD-AUDINE, Christophe
This study proposes to investigate the effects of dry friction on the behaviour of a parametrically excited nonlinear oscillator using a pendulum as example. A harmonic balance method and time integration simulations are used to respectively compute and validate the solutions of the problem and their stability. The effects of dry friction on the be...
UGWUANYI, Nnaemeka Sunday KESTELYN, Xavier THOMAS, Olivier MARINESCU, Bogdan WANG, Bin
This paper proposes a new system-level application for monitoring out-of-step (OOS) events in power systems. As already known, amplitude-dependent frequency shift is a nonlinear phenomenon of electromechanical oscillations under large disturbances. The frequency shift indicates the system’s nearness to instability. This new tool utilizes the Normal...
LARIVIERE, Ophélie CHADEFAUX, Delphine SAURET, Christophe KORDULAS, Layla THOREUX, Patricia
Manual wheelchair (MWC) users are exposed to whole-body vibrations (WBVs) during propulsion. Vibrations enter the MWC structure through the wheels’ hub, propagate according to the MWC dynamical response, and finally reach the user’s body by the footrest, seat, backrest, and handrims. Such exposure is likely to be detrimental to the user’s health an...
SHAMI, Zein A. THOMAS, Olivier GIRAUD-AUDINE, Christophe
In this paper, a semi-passive nonlinear piezoelectric shunt absorber is presented, aiming at attenuating the vibration of a resonant elastic structure under external excitation. This is done by connecting the elastic structure to a nonlinear shunt circuit via a piezoelectric patch. The nonlinear shunt circuit consists of resonant circuit that inclu...
BALMES, Etienne MARTIN, Guillaume VERMOT DES ROCHES, Guillaume CHANCELIER, Thierry THOUVIOT, Sylvain
Since tests only provide measurements at sensors, it is interesting to use models to estimate the response at all degree of freedom, correct measurement errors and possibly allow updating of model parameters. The paper gives an integrated perspective on methods developed by the control and structural dynamics communities and in particular methods s...
MARTIN, Guillaume BALMES, Etienne CHANCELIER, Thierry THOUVIOT, Sylvain LEMAIRE, Rémi
To analyze brake squeal, measurements are performed to extract Operational Deflection Shapes (ODS) characteristic of the limit cycle. The advantage of this strategy is that the real system behavior is captured, but measurements suffer from a low spatial distribution and hidden surfaces, so that interpretation is sometimes difficult. It is even more...
BENACCHIO, Simon THOMAS, Olivier GIRAUD-AUDINE, Christophe
Parametrically excited oscillators are used in several domains, in particular to improve the dynamical behaviour of systems like in the case of the parametric amplification or parametric energy harvesting. Although dry friction is often omitted during system modelling due to the complexity of its nonsmooth nature, it is sometimes necessary to accou...