Modal localisation in a beam modelled as a continuous system: A discussion on the use of auxiliary oscillators

EAR Ribeiro, S Lenci, CEN Mazzilli - Journal of Sound and Vibration, 2020 - Elsevier
In this work, we show that perfectly localised modal vibrations can be obtained in continuous
linear elastic structures, provided that, in addition to the regular boundary and …

Piezoelectric vibration controller in a parametrically-excited system with modal localisation

BAP Mendes, EAR Ribeiro, CEN Mazzilli - Meccanica, 2020 - Springer
In a previous work, the authors investigated, with promising results, the use of a piezoelectric
element for the sake of energy harvesting from a rod assemblage subjected to varying …

Prediction of aerodynamically induced blade vibrations in a radial turbine rotor using the nonlinear harmonic approach

N Kovachev, CU Waldherr… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
Resonant response of turbomachinery blades can lead to high cycle fatigue (HCF) if the
vibration amplitudes are excessive. Accurate and reliable simulations of the forced response …

Influence of geometric nonlinearities on the asynchronous modes of an articulated prestressed slender structure

EAR Ribeiro, CEN Mazzilli… - … of Vibration and …, 2019 - asmedigitalcollection.asme.org
Synchronous modal oscillations, characterized by unisonous motions for all physical
coordinates, are well known. In turn, asynchronous oscillations lack a general definition to …

Design and Development of a Real-Time Simulation and Testing Platform for a Novel Seamless Two-Speed Transmission for Electric Vehicles1

TS Nguyen, J Song, L Yu… - Journal of …, 2019 - asmedigitalcollection.asme.org
An approach for building a real-time simulation and testing platform for a novel seamless
two-speed automated manual transmission (AMT) for electric vehicles (EVs) is proposed …

Energy harvesting in a slender-rod model with modal asynchronicity

BAP Mendes, CEN Mazzilli, EAR Ribeiro - Nonlinear Dynamics, 2020 - Springer
The motivation for this paper comes from offshore engineering, in which pre-stressed heavy
chains, vertical cables, and rods attached to floating buoys are subjected to imposed heave …

Asynchronous modes of beams on elastic media subjected to varying normal force: continuous and discrete models

CEN Mazzilli, EAR Ribeiro - IUTAM Symposium on Exploiting Nonlinear …, 2020 - Springer
The asynchronous vibration modes of a prismatic beam on elastic media under varying
normal force are addressed for both continuous and discrete models. For the latter ones …

Asynchronous Modes of Vibration

CEN Mazzilli, EAR Ribeiro, BAP Mendes - Lectures on Nonlinear …, 2023 - Springer
This work provides a comprehensive discussion about the modal asynchronicity (or
localisation) phenomenon applied to structural systems. Departing from a Ziegler's column …

Modal asynchronicity in pre-stressed continuous simply-supported beams with transversal and rotational oscillators

EAR Ribeiro, S Lenci, CEN Mazzilli - Recent Trends in Chaotic …, 2022 - World Scientific
The existence of structural systems where some vibration modes are perfectly localized/
asynchronous (that is, where finite parts of the structure remain at rest along some modal …

[PDF][PDF] Modal asynchronicity in a simply-supported beam with a cantilever extension

EAR Ribeiro, S Lenci, BAP Mendes… - XXIV AIMETA …, 2019 - researchgate.net
It is well-known that linear systems commonly experience synchronous modal oscillations.
Modal synchronicity implies that all material points reach their maxima/minima at the same …