Universitat Politècnica de Catalunya
Now showing items 1-20 of 88
This thesis presents a three-dimensional dynamic model of a double-deck circular tunnel embedded in a full-space. The model uses the receptance method to obtain the response of the complete structure from the response of ...
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 ...
(English) The Action Research Arm Test (ARAT) is a measurement tool to assess post-stroke upper extremities motor function. However, ARAT scoring can be subjective and limited only to determining performance quality. ...
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 ...
This thesis is concerned with the development of efficient and practical numerical methodologies to deal with longitudinally invariant soil-structure interaction problems in elastodynamics. All the approaches appearing in ...
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 ...
This thesis presents a methodology for assessing induced ground-borne vibration due to Underground railway infrastructures in the context of an urban environment. The methodology is based on a comprehensive numerical ...
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 ...
(English) Fiber-Reinforced Cementitious Matrix (FRCM) is a strengthening method that has been increasing its importance versus Fiber-Reinforced Polymer (FRP) due the lower cost and lower toxicity of its materials. The ...
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 ...
Los volantes de inercia superan a las baterías eléctricas por su capacidad de absorber y ceder energía en poco tiempo y, si se fabrican con materiales compuestos, también por su reducido peso. La tesis presenta un estudio ...
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 ...
Los mecanismos leva-palpador en los que el cierre del par superior se realiza por la configuración geométrica de la leva y del palpador son denominados desmodrómicos o levas con cierre geométrico. Estos mecanismos son poco ...
En multitud de aplicaciones, es de interés obtener relaciones de transmisión variables a lo largo de un ciclo de rotación del eslabón conductor. Éstas pueden obtenerse mediante distintos mecanismos, entre ellos los engranajes ...
This dissertation is concerned with investigating the efficiency of dynamic vibration absorbers (DVAs) as measures to mitigate ground-borne vibrations induced by railway traffic in double-deck tunnels. The main topics of ...
(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 ...
Degeneration and age affect the biomechanics of the intervertebral disc, by reducing its stiffness, flexibility and shock absorption capacities against daily movement and spinal load. The biomechanical characterization of ...
