UPCommons
http://upcommons.upc.edu
UPCommons, the website that provides open access to the knowledge of UPC, is formed by the group of open institutional repositories of UPC and its aim is to guarantee the safeguarding of the material produced by lecturers and researchers at the University, to maximise that material’s visibility and, consequently, to increase its impact on education and research worldwide.2016-08-29T23:32:59ZProjecte de l'EDAR i dels col.lectors associats al municipi de Sucs (Lleida)
http://hdl.handle.net/2117/89400
Projecte de l'EDAR i dels col.lectors associats al municipi de Sucs (Lleida)
Ramos Bret, Maria Elisabeth
2016-08-29T11:24:10ZRamos Bret, Maria ElisabethProjecte de l'EDAR al nucli de Rocabruna (Ripollès)
http://hdl.handle.net/2117/89399
Projecte de l'EDAR al nucli de Rocabruna (Ripollès)
Muñoz Guillén, Carlos
2016-08-29T11:22:05ZMuñoz Guillén, CarlosProjecte Constructiu de l'EDAR de L'Albi (Garrigues)
http://hdl.handle.net/2117/89398
Projecte Constructiu de l'EDAR de L'Albi (Garrigues)
Pi Torras, Teresa
2016-08-29T11:18:29ZPi Torras, TeresaProjecte de l'EDAR i dels col·lectors de Massalcoreig
http://hdl.handle.net/2117/89397
Projecte de l'EDAR i dels col·lectors de Massalcoreig
Gelabert Colom-Noguera, Ramon
2016-08-29T11:16:47ZGelabert Colom-Noguera, RamonProjecte de l'EDAR i dels col·lectors associats al municipi de Gimenells i Pla de la Font (Segrià)
http://hdl.handle.net/2117/89396
Projecte de l'EDAR i dels col·lectors associats al municipi de Gimenells i Pla de la Font (Segrià)
Mercadé Giribet, Ricard
2016-08-29T11:13:46ZMercadé Giribet, RicardProjecte de l'EDAR i dels col.lectors en alta de Masarac (Alt Emporda)
http://hdl.handle.net/2117/89395
Projecte de l'EDAR i dels col.lectors en alta de Masarac (Alt Emporda)
Nadal Canals, Ferran
Projectar un sistema de sanejament al municipi de Masarac (Alt Emporda) amb la seva estació depuradora d'aigues residuals i els col·lectors associats.
2016-08-29T11:11:51ZNadal Canals, FerranProjecte de l'EDAR i dels col.lectors en alta de Canaletes i Can Ros a Cabrera d'Anoia
http://hdl.handle.net/2117/89394
Projecte de l'EDAR i dels col.lectors en alta de Canaletes i Can Ros a Cabrera d'Anoia
Padilla López, Alberto
Projectar un sistema de sanejament als nuclis de Canaletes i Can Ros al municipi de Cabrera d'Anoia amb la seva estació depuradora d'aigües residuals i els col·lectors associats
2016-08-29T11:07:42ZPadilla López, AlbertoA multivariate statistical model of extreme events: an application to the Catalan coast
http://hdl.handle.net/2117/89393
A multivariate statistical model of extreme events: an application to the Catalan coast
Lin Ye, Jue; García León, Manuel; Gracia Garcia, Vicente; Sánchez-Arcilla Conejo, Agustín
Wave extreme events can be understood as the combination of Storm-intensity, Directionality and Intra-time distribution. However, the dependence structure among these factors is still unclear. A methodology has been developed to model wave-storms whose components are linked together. The model is composed by three parts: an intensity module, a wave directionality module, and an intra-time distribution module. In the Storm-intensity sub-model, generalized Pareto distributions and hierarchical Archimedean copulas have been used to characterize the storm energy, unitary energy, peak wave-period and duration. In the Directionality and Intra-time sub-models, the wave direction (at the peak of the storm) and the storm growth–decay rates are linked to the variables from the intensity model, respectively. The model is applied to the Catalan coast (NW Mediterranean). The outcomes denote spatial patterns that coincide with the state of knowledge. The proposed methodology is able to provide boundary conditions for wave and near-shore studies, saving computational time and establishing the dependence of the proposed variables. Such synthetic storms reproduce the inter-variable co-dependence of the original data.
2016-08-29T10:54:18ZLin Ye, JueGarcía León, ManuelGracia Garcia, VicenteSánchez-Arcilla Conejo, AgustínWave extreme events can be understood as the combination of Storm-intensity, Directionality and Intra-time distribution. However, the dependence structure among these factors is still unclear. A methodology has been developed to model wave-storms whose components are linked together. The model is composed by three parts: an intensity module, a wave directionality module, and an intra-time distribution module. In the Storm-intensity sub-model, generalized Pareto distributions and hierarchical Archimedean copulas have been used to characterize the storm energy, unitary energy, peak wave-period and duration. In the Directionality and Intra-time sub-models, the wave direction (at the peak of the storm) and the storm growth–decay rates are linked to the variables from the intensity model, respectively. The model is applied to the Catalan coast (NW Mediterranean). The outcomes denote spatial patterns that coincide with the state of knowledge. The proposed methodology is able to provide boundary conditions for wave and near-shore studies, saving computational time and establishing the dependence of the proposed variables. Such synthetic storms reproduce the inter-variable co-dependence of the original data.The solution of linear mechanical systems in terms of path superposition
http://hdl.handle.net/2117/89392
The solution of linear mechanical systems in terms of path superposition
Magrans Fontrodona, Francesc Xavier; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio
We prove that the solution of any linear mechanical system can be expressed as a linear combination of signal transmission paths. This is done in the framework of the Global Transfer Direct Transfer (GTDT) formulation for vibroacoustic problems. Transmission paths are expressed as powers of the transfer matrix. The key idea of the proof is to generalise the Neumann series of the transfer matrix --which is convergent only if its spectral radius is smaller than one-- into a modified Neumann series that is convergent regardless of the eigenvalues of the transfer matrix. The modification consists in choosing the appropriate combination coefficients for the powers of the transfer matrix in the series. A recursive formula for the computation of these factors is derived. The theoretical results are illustrated by means of numerical examples. Finally, we show that the generalised Neumann series can be understood as an acceleration (i.e. convergence speedup) of the Jacobi iterative method.
2016-08-29T10:40:45ZMagrans Fontrodona, Francesc XavierPoblet-Puig, JordiRodríguez Ferran, AntonioWe prove that the solution of any linear mechanical system can be expressed as a linear combination of signal transmission paths. This is done in the framework of the Global Transfer Direct Transfer (GTDT) formulation for vibroacoustic problems. Transmission paths are expressed as powers of the transfer matrix. The key idea of the proof is to generalise the Neumann series of the transfer matrix --which is convergent only if its spectral radius is smaller than one-- into a modified Neumann series that is convergent regardless of the eigenvalues of the transfer matrix. The modification consists in choosing the appropriate combination coefficients for the powers of the transfer matrix in the series. A recursive formula for the computation of these factors is derived. The theoretical results are illustrated by means of numerical examples. Finally, we show that the generalised Neumann series can be understood as an acceleration (i.e. convergence speedup) of the Jacobi iterative method.Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory
http://hdl.handle.net/2117/89391
Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory
Hopkins, Carl; Crispin, Charlotte; Poblet-Puig, Jordi; Guigou-Carter, Catherine
Sound insulation prediction models in European and International standards use the vibration reduction index to calculate flanking transmission across junctions of walls and floors. These standards contain empirical relationships between the ratio of mass per unit areas for the walls/floors that form the junction and a frequency-independent vibration reduction index. Calculations using wave theory show that there is a stronger relationship between the ratio of characteristic moment impedances and the transmission loss from which the vibration reduction index can subsequently be calculated. In addition, the assumption of frequency-independent vibration reduction indices has been shown to be incorrect due to in-plane wave generation at the junction. Therefore numerical experiments with FEM, SFEM and wave theory have been used to develop new regression curves between these variables for the low-, mid- and high-frequency ranges. The junctions considered were L-, T- and X-junctions formed from heavyweight walls and floors. These new relationships have been implemented in the prediction models and they tend to improve the agreement between the measured and predicted airborne and impact sound insulation.
2016-08-29T10:34:56ZHopkins, CarlCrispin, CharlottePoblet-Puig, JordiGuigou-Carter, CatherineSound insulation prediction models in European and International standards use the vibration reduction index to calculate flanking transmission across junctions of walls and floors. These standards contain empirical relationships between the ratio of mass per unit areas for the walls/floors that form the junction and a frequency-independent vibration reduction index. Calculations using wave theory show that there is a stronger relationship between the ratio of characteristic moment impedances and the transmission loss from which the vibration reduction index can subsequently be calculated. In addition, the assumption of frequency-independent vibration reduction indices has been shown to be incorrect due to in-plane wave generation at the junction. Therefore numerical experiments with FEM, SFEM and wave theory have been used to develop new regression curves between these variables for the low-, mid- and high-frequency ranges. The junctions considered were L-, T- and X-junctions formed from heavyweight walls and floors. These new relationships have been implemented in the prediction models and they tend to improve the agreement between the measured and predicted airborne and impact sound insulation.