Universitat Politècnica de Catalunya
Now showing items 9-28 of 80
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 ...
El aumento de la competencia en el área de la fabricación moderna ha propiciado una mayor preocupación por la reducción de los costes, por el aumento de la calidad del producto y por la reducción progresiva del tiempo entre ...
(English) People with spinal cord injury (SCI) may suffer lifelong sequels that influence every aspect of their lives, including motor and/or sensory impairment, difficulty breathing and/or swallowing, bladder/bowel weakness, ...
En aquest treball s'ha realitzat una anàlisi de la junta T-bolt aplicada a la unió de laminats gruixuts amb elements metàl·lics. Més concretament, l'estudi es centra en el tipus de juntes T-bolt emprades en la unió entre ...
The acoustic field inside a car cabin for low driving speeds is dominated by the engine or the tire noise. However, for mid to high velocities, the noise generated by the interaction of the car with the external air becomes ...
La tesi "Contribució a l'estudi de l'acústica dels tubs axisimètrics" és un treball centrat en l'estudi del comportament acústic dels tubs dels instruments musicals de vent amb simetria de revolució en el qual es fa ...
La present tesi doctoral s’ha centrat en el repte d’aconseguir, mitjançant Fabricació Additiva (FA), models per a assaig quirúrgic, sota la premissa que els equips per fer-los haurien de ser accessibles a l’àmbit hospitalari. ...
One of the main problems presented due to the defects in the profiles of the railway wheels is the generation of vibrations and noise, and their propagation towards the environment. Defects in wheels, such as surface pitting ...
The present work composes a contribution towards the Construction of World models for its implementation in 'Agile Manufacturing Architectures', aiming to take a step further the control programs for manufacturing systems, ...
