Browsing by Subject "Vibració"
Now showing items 1-20 of 99
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A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration
(Elsevier, 2022-12-01)
Article
Open AccessThis paper proposes and studies a ring-shaped architecture with Halbach configuration for electromagnetic vibration energy harvesters. The proposed transducer consists of three ring magnets with a linear Halbach array that ... -
A pile–soil interaction model for ground-borne vibration problems based on the singular boundary method
(Elsevier, 2024-01-06)
Article
Restricted access - publisher's policyAn efficient three-dimensional approach for solving pile–soil interaction problems is proposed. In the approach, the soil is modelled as an elastic half-space, and its response in the presence of the pile’s corresponding ... -
A study of the applicability of an in-situ method to characterise multiple resilient elements simultaneously
(Universitat Politècnica de Catalunya, 2021-06-22)
Bachelor thesis
Open AccessIn this project the validity of an in-situ method to evaluate resilient elements is verified for systems with more than one connection. Potential advantages of this method would be testing elements under more realistic and ... -
Adaptive autofocus technique for speckle control in optical feedback interferometry
(2014-09-01)
Article
Restricted access - publisher's policyAn adaptive autofocus technique for the control of speckle effect in optical feedback interferometry (OFI) is discussed. The beam spot size effect over the OFI signal is presented, justifying the proposed approach. An ... -
Advanced condition monitoring of Pelton turbines
(2018-04)
Article
Open AccessThe ability of hydropower to adapt the electricity generation to the demand is necessary to integrate wind and solar energy into the electrical grid. Nowadays, hydropower turbines are required to work under harsher operating ... -
An experimental/numerical hybrid methodology for the prediction of railway-induced ground-borne vibration on buildings to be constructed close to existing railway infrastructures: Numerical validation and parametric study
(Elsevier, 2021-11-01)
Article
Open AccessA novel experimental/numerical hybrid methodology for the assessment of railway-induced ground-borne vibration in buildings based on experimental measurements in the soil surface is proposed in this paper. This methodology ... -
Analysis of Different Cylindrical Magnet and Coil Configurations for Electromagnetic Vibration Energy Harvesters
(2021-06-01)
Article
Open AccessElectromagnetic vibration energy harvesting is a relatively new technology that transforms kinetic energy from mechanical vibrations into electrical energy, allowing the substitution of batteries or cables for powering ... -
Analysis of roughness and vibration signals in milling processes
(Universitat Politècnica de Catalunya, 2016-06-23)
Bachelor thesis
Restricted access - confidentiality agreement -
Analysis of roughness, force and vibration signals in ball-end milling processes
(2015)
Conference report
Open AccessIn the present paper, roughness, force and vibration signals from ball-end milling processes are analysed. From the roughness signal actual feed value was obtained as expected. From the force and vibration signals both the ... -
Analysis of the mode shapes of Kaplan runners
(Multidisciplinary Digital Publishing Institute, 2022-07-02)
Article
Open AccessTo prevent lifetime shortening and premature failure in turbine runners, it is of paramount importance to analyse and understand its dynamic response and determine the factors that affect it. In this paper, the dynamic ... -
Analysis of the vibration amplitude in a 3d printer carriage. Ceramic 3D printer model BCN3D+ (2016)
(2022-03-18)
Research report
Restricted access - confidentiality agreementThis analysis has been performed in a 3d printer type BCN3D+ (2016) serial number 01.161111.1375, modified to adapt ceramic print heads (Figure 1). The objective is to determine the error in the position of the print head ... -
Analytical scheme of stability analysis for 4-DoF mechanical system subjected to friction-induced vibrations
(2023-06)
Article
Open AccessPurpose: The stability problem for non-conservative multi-parameter dynamical system is usually associated with laborintensive calculations, and numerical methods do not always allow one to obtain the desired information. ... -
Anàlisi de vibracions de màquines rotatives
(Universitat Politècnica de Catalunya, 2022-01)
Bachelor thesis
Restricted access - author's decision
Covenantee: KnaufEn aquest treball es presenta una proposta d’implementació del manteniment preventiu. Aquest es basa en anàlisi de vibracions a les màquines més importants del procés productiu de la fàbrica Knauf de Guixers (Solsonès). ... -
Anàlisi de vibracions en bancades per a proves de motors
(Universitat Politècnica de Catalunya, 2015)
Bachelor thesis
Open AccessTrobar un mètode senzill i compatible amb les eines de les que disposa l’empresa, per analitzar els efectes de les vibracions causades pels motors alternatius de combustió interna en els bancs de proves. I així poder-ne ... -
Análisis de las vibraciones y fluctuaciones de presión en una bomba turbina
(1992-03)
Article
Restricted access - publisher's policyEn este artículo se describe el análisis de las mediciones de presión no estacionaria y vibraciones en una bomba-turbina a fin de identificar el origen de las vibraciones en una estructura próxima a la central. Una excitación ... -
Análisis de vibraciones en máquinas rotativas : Caso práctico de dos bombas de GPL
(Universitat Politècnica de Catalunya, 2010-03)
Master thesis (pre-Bologna period)
Restricted access - author's decision -
Análisis de vibración libre de una viga Timoshenko escalonada, centrífugamente rigidizada, mediante el método de cuadratura diferencial
(Universitat Politècnica de Catalunya, 2009)
Article
Open AccessEste artículo trata sobre las vibraciones transversales de una viga rotante de sección no uniforme, utilizando el método de cuadratura diferencial (MCD). La formulación se basa en la teoría de Timoshenko, que considera ... -
Análisis del efecto de mecanizado asistido con vibraciones en fractura por fatiga
(Universitat Politècnica de Catalunya, 2023-05-22)
Bachelor thesis
Open AccessEn aquest projecte, mitjançant el torn CNC (Computer Numerical Control), s’ha mecanitzat una proveta d’acer AISI1045 d’acord amb la norma ISO 1143-2010. Posterior a la fase de desbast, a la fase d’acabat s’ha treballat amb ... -
Aportación del proceso de bruñido asistido con vibraciones al comportamiento de fractura por fatiga en probetas de acero AISI1045
(Universitat Politècnica de Catalunya, 2023-05-22)
Bachelor thesis
Open AccessPara este proyecto se han mecanizado probetas de acero AISI 1045 concorde a la ISO 1143-2010. El acabado de estas probetas se ha realizado con una herramienta de bruñido con vibración asistida con el objetivo de estudiar ... -
Aspect ratio influence on the vortex induced vibrations of a pivoted finite height cylinder at low Reynolds number
(2023-08-10)
Article
Open AccessThe effect of the aspect ratio on the vortex induced vibrations (VIV) of a pivoted finite length circular cylinder is investigated. A fixed value of the Reynolds number Re = 100 with four values of the aspect ratio ...