A dynamical model of a double-deck circular tunnel embedded in a full-space 

    Clot Razquin, Arnau (Date of defense: 2014-02-20)

    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 ...

    A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration: design, optimization, and applications 

    Ordóñez Izquierdo, Víctor Hugo (Date of defense: 2022-09-22)

    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 ...

    A model for railway induced ground vibrations in the frame of preliminary assessment studies 

    Arcos Villamarín, Robert (Date of defense: 2007-07-13)

    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 ...

    A new computational approach to topology optimization in solid mechanics problems 

    Yago Llamas, Daniel (Date of defense: 2022-01-24)

    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 ...

    A virtual environment to evaluate and predict recovery of human hand motion post-stroke 

    Padilla Magaña, Jesús Fernando (Date of defense: 2022-11-18)

    (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 control of noise transmitted from barriers 

    Sohrabi, Shahin (Date of defense: 2022-03-11)

    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 ...

    Active flow control optimization on Selig Donovan 7003 airfoil 

    Monshi Tousi, Navid (Date of defense: 2023-06-16)

    (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 ...

    Advanced 2.5D meshless methodologies to deal with soil-structure interaction problems in elastodynamics 

    Liravi, Hassan (Date of defense: 2022-07-29)

    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 ...

    Amortiguación de final de carrera de actuadores hidráulicos 

    Algar Espejo, Antonio (Date of defense: 2021-02-08)

    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 ...

    An efficient methodology based on two-and-a-half-dimensional finite element and boundary element methods for ground-borne vibration radiated by underground railway tunnels and the re-radiated noise emitted inside them 

    Ghangale, Dhananjay (Date of defense: 2019-07-19)

    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 ...

    Analysis and design of a capillary driven blood plasma separation microfluidic device 

    Madadi, Hojjat (Date of defense: 2014-01-17)

    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 ...

    Anàlisi del comportament de bigues de formigó armat reforçades amb FRCM vegetal sota càrregues de flexió cíclica 

    Mendizábal Dinucci, Virginia Dolores (Date of defense: 2023-03-23)

    (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 ...

    Análisis de la respuesta dinámica en agitadores industriales 

    Bossio, Matias (Date of defense: 2021-06-01)

    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 ...

    Análisis y diseño de volantes de inercia de materiales compuestos 

    Ripoll Masferrer, Lluís (Date of defense: 2006-01-11)

    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 ...

    Aportació a l'estudi de la reducció de vibracions residuals en transitoris de moviment generats mitjançant accionaments de cinemàtica no lineal 

    Lores Garcia, Eduard (Date of defense: 2017-12-22)

    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 ...

    Aportación al estudio de levas desmodrómicas 

    Zayas Figueras, Enrique Ernesto (Date of defense: 2001-11-26)

    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 ...

    Aporte al diseño de engranajes no circulares cilíndricos rectos 

    Quintero Riaza, Héctor Fabio (Date of defense: 2006-06-28)

    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 ...

    Application of dynamic vibration absorbers on double-deck circular railway tunnels to mitigate railway-induced ground-borne vibration 

    Noori, Behshad (Date of defense: 2019-07-19)

    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 ...

    Application of the vibration-assisted ball burnishing process on rotational symmetric parts to improve their fatigue strength and wear properties 

    Velázquez Corral, Eric (Date of defense: 2023-09-05)

    (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 ...

    Biomechanical study of intervertebral disc degeneration 

    González Guitiérrez, Ramiro Arturo (Date of defense: 2012-01-09)

    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 ...