Departament d'Enginyeria Mecànica: Recent submissions
Now showing items 21-40 of 88
A high-performance electromagnetic vibration energy harvester based on ring magnets with Halbach configuration: design, optimization, and applications
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 ...
Advanced 2.5D meshless methodologies to deal with soil-structure interaction problems in elastodynamics
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 ...
Solving the nearest rotation matrix problem in three and four dimensions with applications in robotics
Since the map from quaternions to rotation matrices is a 2-to-1 covering map, this map cannot be smoothly inverted. As a consequence, it is sometimes erroneously assumed that all inversions should necessarily contain ...
Estudio del coeficiente de rigidez y de amortiguación de una suspensión neumática multicámara
Heavy vehicles are generally equipped with Shock Absorber Suspension Cylinders, which, in addition to integrating in the same element, the damping and suspension mechanism, allow obtaining greater suspension travels, ...
Active control of noise transmitted from barriers
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 ...
A new computational approach to topology optimization in solid mechanics problems
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 ...
Specific energy consumption of metal cutting with thin abrasive discs
The aim of this research is to provide an in-depth understanding of energy consumption in abrasive disc cutting processes. The specific energy consumed in cutting is measured,analysed, and then characterised in to three ...
Microfluidic platforms: from 3D printing to µPADs for chemical and biological applications
Over the past decade, microfluidic technology has proven its capabilities to start bringing detection and quantification capacities to novel miniaturized devices. The current generation of microfluidic platforms provide ...
Improved condition monitoring of hydraulic turbines based on artificial intelligence techniques
As a type of renewable energy that can provide rapid response to the requirement of the power grid, hydropower plays a fairly important position in the energy market. In recent years, with the enormous entrance of new ...
Contribución a la metodología de caracterización dinámica de materiales resilientes para aplicaciones ferroviarias
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 ...
Análisis de la respuesta dinámica en agitadores industriales
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 ...
Second life batteries of electric vehicles : analysis of use and management models
The mobility of the future undoubtedly involves the electrification of vehicles. The increase in social awareness towards a reduction in CO2 emissions, together with the introduction of new laws regulating them, has finally ...
Computational aeroacoustics in the automotive industry
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 ...
Modelo estocástico de hueso cortical de costilla humana para la predicción de fracturas mediante emisión acústica
In this document, a non-linear constitutive model with micro-cracking and irreversibility is proposed for cortical bone of the human rib, extended with a stochastic fracture model, based on acoustic emission. Both models ...
Amortiguación de final de carrera de actuadores hidráulicos
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 ...
Numerical investigation and modelling of the unsteady behavior and erosion power of cloud cavitation
Cloud cavitation is a unwanted phenomenon taking place in many hydraulic machines which damages the surfaces of the solid walls due to the erosive aggressiveness induced by the collapse process. Therefore, it is necessary ...
Study of the beam induced vacuum effects in the cryogenic beam vacuum chamber of the Future Circular Hadron Collider
The Future Circular Hadron Collider (FCC-hh) is a proposal for a 100 km long hadron collider conceived as the successor of the Large Hadron Collider (LHC). The FCC-hh is designed to reach 50 TeV of beam energy, greatly ...
Numerical tools for computational design of acoustic metamaterials
The notion of metamaterials as artificially engineered structures designed to obtain specific material properties, typically unachievable in naturally occurring materials, has captured the attention of the scientific and ...
Contributions to aerostructures morphing with piezoelectric actuators
Since the first models developed in the late 19th century, the applications of piezoelectric materials have been progressively growing in number. The capacity of these materials to couple electric and mechanic fields makes ...
Research on fluidic oscillators under incompressible and compressible flow conditions
One of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications. To use these devices in real applications, it is necessary ...
