Computational acoustics and damage mechanics

Computational acoustics and damage mechanics2019-01-07T09:46:39+00:00

The research on computational vibroacoustics includes the development of different modelling strategies to cover all the frequency ranges of interest and technological applications. Among the methods we deal with are finite elements, boundary elements, boundary algebraic equations (low frequencies); modal expansions (mid frequencies); spectral finite elements and statistical energy analysis (high frequencies). The applications are focused on building acoustics (with emphasis on the direct and indirect sound transmission), transfer path analysis (characterisation of complex mechanical systems), and scattering of acoustic and elastic waves.

natural2.pngFracture of natural or engineered materials may be described by means of continuous models (such as gradient damage models or phase-field approaches) or discontinuous models (such as the XFEM, extended finite element method). We are interested in exploring the connections between these two modelling paradigms and in developing hybrid continuous-discontinuous models, with an emphasis on crack tracking for complex branching crack patterns and in advanced discretisation techniques, such as HDG (hybridisable Discontinuous Galerkin).

Selected Publications

An optimization-based phase-field method for continuous-discontinuous crack propagation
Geelen, R.J.M.; Liu, Y.; Dolbow, J.E. and Rodríguez-Ferran, A.
International Journal for Numerical Methods in Engineering, Vol. 116, Issue 1, pp. 1-20, 2018

A subsystem identification method based on the path concept with coupling strength estimation
Magrans, F.X.; Poblet-Puig, J. and Rodríguez-Ferran, A.
Mechanical Systems and Signal Processing, Vol. 100, pp. 588-604, 2018

The solution of linear mechanical systems in terms of path superposition
Magrans, F.X.; Poblet-Puig, J. and Rodríguez-Ferran, A.
Mechanical Systems and Signal Processing, Vol. 85, pp. 111-125, 2017

A medial-axis-based model for propagating cracks in a regularised bulk
Tamayo-Mas, E.; Rodríguez-Ferran, A.
International Journal for Numerical Methods in Engineering, Vol. 101, Issue 7, pp. 489-520, 2015

Projects

Theses

Vibroacoustic coupling and transmission paths
Francesc Xavier Magrans
ETSE de Camins, Canals i Ports de Barcelona
Universitat Politècnica de Catalunya
21 December 2018

Continuous-discontinuous modelling for quasi-brittle failure: propagating cracks in a regularised bulk
Elena Tamayo-Mas (see Thesis web)
Facultat de Matemàtiques i Estadística
Universitat Politècnica de Catalunya
5 December 2013

Efficient models for building acoustics: combining deterministic and statistical methods
Cristina Díaz-Cereceda
ETSE de Camins, Canals i Ports de Barcelona
Universitat Politècnica de Catalunya
15 November 2013

Numerical Modelling of Sound Transmission in Lightweight Structures
Jordi Poblet-Puig
ETSE de Camins, Canals i Ports de Barcelona
Universitat Politècnica de Catalunya
28 March 2008