Experimental validation of a FEM-MFS hybrid numerical approach for vibro-acoustic prediction

Abstract The interest of scientific and technical communities in the re-radiated noise phenomenon has been increasing over the last years, motivated by complaints of inhabitants living in buildings located next to sources of vibrations. The study and quantification of low-frequency noise levels inside these buildings demand accurate methods of prediction. Thus, the present paper aims to contribute to the listed goal by presenting an experimental validation of a 3D FEM-MFS hybrid numerical model, where the Finite Element Method (FEM) is used to evaluate the structural response and the Method of Fundamental Solutions (MFS) is adopted to assess the acoustic response inside a closed space. The experimental work carried out consisted in the excitation of a reduced-size acoustic chamber by applying an impulse load induced by an instrumented hammer. The structural and acoustic dynamic responses of the system were simultaneously monitored by a set of accelerometers and microphones. The case study was then modelled and the experimental data compared with the numerical results, showing that the numerical approach used is efficient and accurate, as it correctly addresses realistic situations involving re-radiated noise by elastic structures.

[1]  Luís Godinho,et al.  Prediction of Vibrations and Reradiated Noise Due to Railway Traffic: A Comprehensive Hybrid Model Based on a Finite Element Method and Method of Fundamental Solutions Approach , 2017 .

[2]  S. Marburg,et al.  Computational acoustics of noise propagation in fluids : finite and boudary element methods , 2008 .

[3]  Geert Lombaert,et al.  The influence of source–receiver interaction on the numerical prediction of railway induced vibrations , 2011 .

[4]  Hyo Seon Park,et al.  Low-frequency impact sound transmission of floating floor: Case study of mortar bed on concrete slab with continuous interlayer , 2015 .

[5]  S. Marburg,et al.  INFLUENCE OF ELEMENT TYPES ON NUMERIC ERROR FOR ACOUSTIC BOUNDARY ELEMENTS , 2003 .

[6]  Jaime Ramis,et al.  A Numerical MFS Model for Computational Analysis of Acoustic Horns , 2012 .

[7]  Barry Gibbs,et al.  Low frequency impact sound transmission in dwellings through homogeneous concrete floors and floating floors , 2011 .

[8]  I. Croy,et al.  Effects of train noise and vibration on human heart rate during sleep: an experimental study , 2013, BMJ Open.

[9]  Geert Degrande,et al.  Prediction of Interior Noise in Buildings Generated by Underground Rail Traffic , 2006 .

[10]  Steffen Marburg,et al.  EXPERIMENTAL VERIFICATION OF STRUCTURAL-ACOUSTIC MODELLING AND DESIGN OPTIMIZATION , 2002 .

[11]  Graeme Fairweather,et al.  The method of fundamental solutions for transmission and scattering of elastic waves , 1992 .

[12]  Masoud Sanayei,et al.  Measurement and prediction of train-induced vibrations in a full-scale building , 2014 .

[13]  Graeme Fairweather,et al.  Analysis of acoustic scattering in fluids and solids by the method of fundamental solutions. , 1992 .

[14]  Mikael Ögren,et al.  On the Influence of Freight Trains on Humans: A Laboratory Investigation of the Impact of Nocturnal Low Frequency Vibration and Noise on Sleep and Heart Rate , 2013, PloS one.

[15]  Amir Boag,et al.  Analysis of two‐dimensional acoustic scattering from periodic structures using a hybrid source model , 1989 .

[16]  António Tadeu,et al.  A three-dimensional acoustics model using the method of fundamental solutions , 2008 .

[17]  J.A.F. Santiago,et al.  SOME OBSERVATIONS ON THE BEHAVIOR OF THE METHOD OF FUNDAMENTAL SOLUTIONS IN 3D ACOUSTIC PROBLEMS , 2012 .

[18]  Bo Engdahl,et al.  Annoyance and self-reported sleep disturbances due to structurally radiated noise from railway tunnels , 2007 .

[19]  Mikael Ögren,et al.  Physiological effects of railway vibration and noise on sleep. , 2017, The Journal of the Acoustical Society of America.

[20]  Pedro Galvín,et al.  Modelling of acoustic and elastic wave propagation from underground structures using a 2.5D BEM-FEM approach , 2017 .

[21]  A. Moorhouse,et al.  Quantification of the effects of audible rattle and source type on the human response to environmental vibration. , 2016, The Journal of the Acoustical Society of America.

[22]  Fernando G. Branco,et al.  On the use of a small-sized acoustic chamber for the analysis of impact sound reduction by floor coverings , 2010 .

[23]  Graeme Fairweather,et al.  The method of fundamental solutions for scattering and radiation problems , 2003 .

[24]  S. Marburg.  SIX BOUNDARY ELEMENTS PER WAVELENGTH: IS THAT ENOUGH? , 2002 .

[25]  Geert Lombaert,et al.  Ground-Borne Vibration due to Railway Traffic: A Review of Excitation Mechanisms, Prediction Methods and Mitigation Measures , 2015 .

[26]  Fulop Augusztinovicz,et al.  Numerical modelling of ground-borne noise and vibration in buildings due to surface rail traffic , 2007 .

[27]  Filipe Magalhães,et al.  Explaining operational modal analysis with data from an arch bridge , 2011 .

[28]  Paulo Amado Mendes,et al.  3D Multi-Domain MFS Analysis of Sound Pressure Level Reduction Between Connected Enclosures , 2011 .

[29]  Rui Calçada,et al.  Influence of soil stiffness on building vibrations due to railway traffic in tunnels: Numerical study , 2014 .

[30]  Georges Kouroussis,et al.  Benchmarking railway vibrations – Track, vehicle, ground and building effects , 2015 .

[31]  Benoit Nennig,et al.  The method of fundamental solutions for acoustic wave scattering by a single and a periodic array of poroelastic scatterers , 2011 .

[32]  S. Marburg,et al.  A platform for benchmark cases in computational acoustics , 2015 .

[33]  Christian Madshus,et al.  Simulating low frequency sound transmission through walls and windows by a two-way coupled fluid structure interaction model , 2017 .

[34]  António Silva Cardoso,et al.  Vibrations inside buildings due to subway railway traffic. Experimental validation of a comprehensive prediction model. , 2016, The Science of the total environment.