Publications associées à Modal analysis

Vibrational NDT with Under-sampled Data through Physics-informed Neural Networks

The vibrational response of solid materials and structural components is substantially governed by their mechanical and geometrical properties. Low-frequency vibrations and modal frequencies are sensitive to global geometrical deviations, while high-freque ...

2023

Seismic vulnerability assessment of free-standing massive masonry columns by the 3D Discrete Element Method

Jinwoo Kim

Free-standing masonry column is a recurrent typology of built cultural heritage. Usually raised without seismic design, columns are subject to intense rocking and overturning under strong ground motions. In this paper, a strategy to assess their seismic vu ...

ELSEVIER SCI LTD2021

Seismic analyses of the Double Closure Plate Sub-Plate for the ITER Electron Cyclotron Upper Launcher during the Vacuum Vessel baking scenario

Timothy Goodman, René Chavan, Matteo Vagnoni, Avelino Mas Sanchez

The Double Closure Plate Sub-Plate (DCPSP) was introduced in the Electron Cyclotron Upper Launcher (EC UL) design in order to minimize the openings exposing the interior of the Port Plug (PP) to the port cell; avoiding thus the near environment activation ...

2019

Dynamic impedance spectroscopy using dynamic multi-frequency analysis: A theoretical and experimental investigation

Alberto Battistel

Dynamic impedance spectroscopy is a powerful tool to investigate the temporal development of reaction kinetics in electrochemical systems, where the reactive species may undergo irreversible changes during the measurement. In this work we redefined dynamic ...

Elsevier2017

Monitoring of composite structures using a network of integrated PVDF film transducers

Thomas Gmür, Joël Cugnoni, Enrique René Guzman Solares

Aiming to reduce costs, polyvinylidene difluoride (PVDF) film patches are an emerging alternative to more classic piezoelectric technologies, like ceramic patches, as transducers to measure local deformation in many structural applications. This choice is ...

Institute of Physics2015

Loading protocols for European regions of low to moderate seismicity

Katrin Beyer, Panagiotis Mergos

Existing loading protocols for quasi-static cyclic testing of structures are based on recordings from regions of high seismicity. For regions of low to moderate seismicity they overestimate imposed cumulative damage demands. Since structural capacities are ...

Springer Verlag2014

Geometrical description and structural analysis of a modular timber structure

Yves Weinand, Seyed Sina Nabaei, Olivier Baverel

The ambitious goal of the ongoing research at IBOIS, the Laboratory of timber constructions at the Ecole Polytechnique Fédérale de Lausanne (EPFL) is to develop a next generation of timber constructions made out of innovative timber-derived products, throu ...

2011

Geometrical description and Structural analysis of a Modular Timber Structure

Yves Weinand, Seyed Sina Nabaei

The ambitious goal of the ongoing research at IBOIS, the Laboratory of timber constructions at the Ecole Polytechnique Fédérale de Lausanne (EPFL) is to develop a next generation of timber constructions made out of innovative timber-derived products, throu ...

2011

Characterisation of Low Impact Energy Induced Damage in Composite Plates with Embedded Optical Sensors

Jeannot Frieden

Fibre reinforced materials are increasingly employed in aerospace, naval and civil structures because of their low weight and high specific strength and stiffness. A major concern is the inherent susceptibility of composite laminates to barely visible dama ...

EPFL2011

Vibration-based characterization of impact induced delamination in composite plates using embedded FBG sensors and numerical modelling

John Botsis, Joël Cugnoni, Jeannot Frieden

Dynamic strain signals from embedded fiber Bragg grating sensors are used for experimental modal analysis in carbon fiber reinforced polymer plates. Throughout a series of impact tests, the change of eigen-frequencies due to damage is evaluated for differe ...

2011