Ara es mostren els items 1-20 de 33

  • A deterministic model of impact noise transmission through structural connections based on modal analysis 

    Díaz Cereceda, Cristina; Hetherington, Jack; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2011-01-17)
    Article
    Accés obert
    Vibration transmission through structural connections is modelled in a deterministic way by means of modal analysis. This model is used first to study the effect of elastic joints across the floor in the transmission of ...
  • A modal-spectral model for flanking transmissions 

    Poblet-Puig, Jordi (2016-11)
    Article
    Accés restringit per política de l'editorial
    A model for the prediction of direct and indirect (flanking) sound transmissions is presented. It can be applied to geometries with extrusion symmetry. The structures are modelled with spectral finite elements. The acoustic ...
  • A numerical technique for obtaining SEA coupling loss factors in double walls 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2012)
    Text en actes de congrés
    Accés obert
    Double walls usually consist of two leaves of material connected by steel studs. Aside from improving the structural performance, studs create a vibration transmission path which connects the two leaves. There is interest ...
  • A subsystem identification method based on the path concept with coupling strength estimation 

    Magrans Fontrodona, Francesc Xavier; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2018-02)
    Article
    Accés restringit per política de l'editorial
    For complex geometries, the definition of the subsystems is not a straightforward task. We present here a subsystem identification method based on the direct transfer matrix, which represents the first-order paths. The key ...
  • Amplified catalogue of vibration reduction index formulas for junctions based on numerical simulations 

    Poblet-Puig, Jordi; Guigou-Carter, Catherine (Deutsche Gesellschaft für Akustik e.V. (DEGA), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The vibration reduction index (Kij) is a key parameter in the prediction of flanking transmissions according to the EN-12354 standard. Formulas for the evaluation of Kij in L, T and X junctions that depend on the mass ratio ...
  • An energy model for the acoustic insulation of absorbing materials 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
    Text en actes de congrés
    Accés obert
    In this work an energy model for the acoustic insulation of absorbing ma- terials is shown. This model is an extension of Statistical Energy Analysis (SEA) [1] in order to account for the effect of non-conservative ...
  • An SEA-like model for double walls filled with absorbing materials 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2012)
    Text en actes de congrés
    Accés obert
    Modelling absorbing materials with statistical energy analysis (SEA) is an open issue. They are neither reverberant subsystems nor conservative couplings. The absorbing material layers located inside the cavities of ...
  • Automatic subsystem identification in statistical energy analysis 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2015-03)
    Article
    Accés obert
    An automatic methodology for identifying SEA (statistical energy analysis) subsystems within a vibroacoustic system is presented. It consists in dividing the system into cells and grouping them into subsystems via a ...
  • Boundary element method based on preliminary discretization 

    Poblet-Puig, Jordi; Valyaev, Valery; Shanin, Andrey (2014-03)
    Article
    Accés obert
    A new numerical method for solving wave diffraction problems is given. The method is based on the concept of boundary elements; i.e., the unknown values are the field values on the surface of the scatterer. An analog of a ...
  • Building performance at low frequency range including flanking transmissions 

    Guigou-Carter, Catherine; Poblet-Puig, Jordi (Deutsche Gesellschaft für Akustik e.V. (DEGA), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Recent researches have proposed alternative formulas for the estimation of the vibration reduction index (Kij) at junctions. Among other aspects, the new approaches propose different expressions for the low, mid and high ...
  • Catalogue of vibration reduction index formulas for heavy junctions based on numerical simulations 

    Poblet-Puig, Jordi; Guigou-Carter, Catherine (2017-07)
    Article
    Accés restringit per política de l'editorial
    The vibration reduction index (Kij) is a key parameter in the prediction of flanking transmissions according to the EN-12354 standard. Formulas for the evaluation of Kij in L, T and X junctions that depend on the mass ratio ...
  • Dos ejemplos de aplicación de métodos numéricos en la modelización de la transmisión de ruido en edificación 

    Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (SOCIEDAD ESPAÑOLA DE ACÚSTICA, 2005)
    Text en actes de congrés
    Accés obert
    Two applications of numerical techniques to the study of sound transmission are shown. In the first one the sound reduction index of a double wall in the low frequency range is computed solving a vibro acoustic problem ...
  • Error estimation in vibroacoustic problems solved by means of finite elements 

    Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2010-06)
    Text en actes de congrés
    Accés obert
    The vibroacoustic equations can be solved by means of the finite element method. A discretisation of the structure and the acoustic domains is required and highly influences the quality of the numerical solution. There ...
  • Experimental and numerical characterization of metallic studs 

    Poblet-Puig, Jordi; Guigou-Carter, C; Villot, M; Rodríguez Ferran, Antonio (European Acoustics Association, 2006)
    Text en actes de congrés
    Accés obert
    In this paper, the characterization of metallic studs used to mount lightweight double wall systems is studied both experimentally and numerically. The metallic studs are usually considered by introducing translational and ...
  • Experimental numerical correlation of subsystem contributions in the advanced transfer path analysis framework 

    Magrans Fontrodona, Francesc Xavier; Arcas, Kevin; Vicens Rodríguez, Pere; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In a complex vibroacoustic system the overall noise or vibration in a given location is the sum of multiple subsystem contributions. From an experimental perspective, the total noise can be directly measured but not the ...
  • Modal-based prediction of sound transmission through slits and openings between rooms 

    Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2013-03-04)
    Article
    Accés obert
    The transmission of sound through slits and openings between cuboid-shaped rooms is analysed. A deterministic model that describes the pressure fields inside the rooms in terms of eigenfunctions and uses the Dirichlet-to-Neumann ...
  • Numerical estimation of coupling loss factors in building acoustics 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2013-10)
    Article
    Accés obert
    A study on the optimal procedure for obtaining SEA (statistical energy analysis) coupling loss factors (CLF) numerically is presented. The energies of an SEA system with two subsystems (one excited, the other one unexcited) ...
  • Numerical modeling of sound transmission in double walls 

    Poblet-Puig, Jordi; Vilaseca Cabo, Roger; Rodríguez Ferran, Antonio (European Acoustics Association, 2006)
    Text en actes de congrés
    Accés obert
    Numerical models for the calculation of sound transmission in double walls are presented. The finite element method (FEM) or analytical solutions (for rectangular domains) are used for the acoustic part of the problem while ...
  • Numerical modelling of the radiation efficiency of asymmetrical structures 

    Poblet-Puig, Jordi; Rodríguez Ferran, Antonio; Guigou-Carter, Catherine; Villot, Michel (2009-05)
    Article
    Accés obert
    The radiation efficiency of a structural element is required by some models in order to predict its sound insulation. A common assumption is that the radiation on both sides of the element is the same. This is not true for ...
  • Pushing SEA beyond its limits: a model for real building structures 

    Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2013)
    Text en actes de congrés
    Accés obert
    The main challenge for models of building acoustics is being able to consider all the geometrical and physical details of real structures with a reasonable computational cost for high frequencies. The SEA (Statistical ...