Universitat Politècnica de Catalunya
Ara mostrant els elements 1-20 de 56
Electromagnetic vibration energy harvesting is a relatively modern technology that has received relevant attention in the last decade from the research community and industry as a potential complement or alternative to the ...
This thesis focuses on the development of an analytical model for the generation and propagation parts of a global model of ground induced vibrations to be used in preliminary assessment studies for the case of at-grade ...
This doctoral thesis addresses topology optimization problems at a single scale. Based on this purpose, a new topology optimization approach is developed in order to improve existing and widespread techniques in the research ...
Active noise cancellation is a unique approach that helps passive noise control in reducing sound levels at low frequencies; nevertheless, successful use of active noise cancellation necessitates performing numerous and ...
(English) The PhD focuses on the study of the flow around an airfoil at different Angles of Attack (AoA) with and without the implementation of Active Flow Control (AFC), while maintaining the Reynolds number constant at ...
The internal cushioning systems of hydraulic linear actuators, of special interest in mobile machinery, pursue to avoid mechanical shocks at their end of stroke. The design where the piston, with perimeter grooves, regulates ...
Recently, the emergence of lab-on-a-chip devices has seen in a variety of applications especially in clinical analys is and diagnostics. ln particular the lack of suitable microdevices for separation of plasma from whole ...
In food and pharmacological industries, reducing the production time and improving the machine flexibility to be adapted to new products is a constant necessity. This generate changes on the initial working conditions for ...
Machines and mechanisms can usually exhibit a vibratory behavior during operation since they are formed by deformable solids of non-negligible mass and non-rigid joints. This oscillatory behavior can be shown for transient ...
(English) This thesis is an experimental investigation into the beneficial effects of the ultrasonic vibration-assisted ball burnishing process on the wear resistance and fatigue life-cycle enhancement of rotational symmetric ...
This thesis is focused on the enhancement and development of advanced methodologies for the dynamic characterisation of resilient elements used in railway applications. On the one hand, this thesis proposes several ...
In recent decades, there has been a digitalization in all areas and faetones have not been been exempt from of this phenomenon, incorporating CAD I CAM I CAE systems, as well as automatas, robots, and real-time control ...
This thesis is the result of collaboration between the university (UPC) and the company (Fluidra SA) within the framework of the program of industrial doctorates of the agency AGAUR (Agencia de Gestión de Ayudas Universitarias ...
The production of components of the moulds and dies sector is increasingly demanding. On the one hand, a better manufacturing quality is required, that requires, among other aspects, the improvement of the surface finish, ...
La principal causa de las vibraciones generadas por la circulación de un tren reside en el contacto rueda-carril, concretamente en las fluctuaciones de la fuerza de contacto provocadas por las irregularidades del perfil ...
(English) The development of more accurate, computationally efficient and practical methodologies for a better understanding of dynamic soil-structure interaction and prediction of ground-borne vibration levels in the ...
(English) Meshless methodologies have emerged as a valuable tool in the field of computational acoustics, offering an efficient approach to model complex acoustic phenomena. These innovative numerical techniques offer a ...
(English) This thesis arose from the need to design new tools that enable a better control of indoor air quality in vehicles. Even though indoor air quality has been widely explored in buildings, this topic has often been ...
Positive displacements pumps, as currently designed, produce significant flow pulsations that result in pressure pulsations. These pulsations contribute to the global noise generated by the installation. Moreover, they ...
This thesis is focused on the calibration of the Acoustic Emission (AE) technique to detect and identify damage mechanisms in tool steels. The AE measurement procedure has been calibrated for two mechanical tests: fracture ...
