Published in SN Applied Sciences
Over the years, machining has been one of the pivotal manufacturing processes used in industries to produce superior products where multiple aspects regulate their efficacy. In this work, the motive is to study the effect of tool rake and approach angle in turning of mild steel specimens while varying process parameters such as spindle speed, feed ...
The subject of the bachelor thesis "Protection of buildings against the adverse effects of noise and vibrations" is to explain the nature of noise and vibrations, their influence on human organism and summarize the issue of unfavorable noise and vibration acting on the object with described possibilities of object protection. Part of the thesis is ...
Published in E3S Web of Conferences
Nowadays, in the increasingly expanding of dynamical influences in the more and more urbanized cities and increased awareness of the owners of the buildings vibrations could be a problem. This paper considers the problem of an inventory of buildings damages as collateral for the investor as well as for owners of buildings located in the zone of dyn...
Civil Engineering | Structural Engineering | Structural Mechanics
We report on ultrafast vibrational response of single Au-Ag alloy and Au porous nanowires obtained by the template method. The oscillations of the sample reflectivity are correlated to eigenmodes (EM) confined in the nanowire. Taking advantage of a free standing geometry , we are able to detect few harmonics. Coupling electron microscopy and pump-p...
The Nb$_3$Sn block coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, in the continuity of the European project EuCARD and EuCARD2. With an aperture of 100 mm and a target bore field of 13 T at 10.6 kA, the magnet is required for a new FRESCA2 cable test facility at CERN. In 2017, the magne...
Published in Nonlinear Dynamics
This study exposes the analytical and numerical analyses of multistable systems for energy harvesting purposes. More specifically, this paper aims at providing appropriate conditions for ensuring equal potential barrier to go from one well to another whatever the order of multistability. This therefore allows optimal operations through either poten...
Les fluides Magnéto-Rhéologiques (MR) de par leurs caractéristiques variant avec le champ magnétique qui leur est appliqué, sont utilisés dans la dissipation d’énergie mécanique. Ainsi, il existe de nombreux dispositifs utilisant ces fluides, par exemple des amortisseurs ou des freins, permettant de contrôler aisément leurs performances. Cependant ...
Dans cette thèse, un stabilisateur actif est conçu pour être embarqué sur la plate-forme d'un Robot Parallèle à Câbles (RPC) et compenser les vibrations de la plate-forme en produisant un torseur d’effort sur celle-ci. Tout d’abord, une modélisation mécanique de divers dispositifs de stabilisation actifs permet de choisir une solution appropriée à ...
This work presents a new enriched finite element method dedicated to the vibrations of axially inhomogeneous Timo-shenko beams. This method relies on the "half-hat" partition of unity and on an enrichment by solutions of the Timo-shenko system corresponding to simple beams with a homogeneous or an exponentially-varying geometry. Moreover, the effic...
