Imperial College London
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ProfessorMichaelLowe

Faculty of Engineering, Department of Mechanical Engineering

Head of Department of Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7000m.lowe Website

 
 
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Assistant

 

Ms Nina Hancock +44 (0)20 7594 7068

 
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Location

 

577DCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sarris:2021:10.1121/10.0005271,
author = {Sarris, G and Haslinger, SG and Huthwaite, P and Nagy, PB and Lowe, MJS},
doi = {10.1121/10.0005271},
journal = {Journal of the Acoustical Society of America},
pages = {4298--4308},
title = {Attenuation of Rayleigh waves due to surface roughness},
url = {http://dx.doi.org/10.1121/10.0005271},
volume = {149},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Rayleigh waves are well known to attenuate due to scattering when they propagate over a rough surface. Theoretical investigations have derived analytical expressions linking the attenuation coefficient to statistical surface roughness parameters, namely, the surface's root mean squared height and correlation length and the Rayleigh wave's wavenumber. In the literature, three scattering regimes have been identified—the geometric (short wavelength), stochastic (short to medium wavelength), and Rayleigh (long wavelength) regimes. This study uses a high-fidelity two-dimensional finite element (FE) modelling scheme to validate existing predictions and provide a unified approach to studying the problem of Rayleigh wave scattering from rough surfaces as the same model can be used to obtain attenuation values regardless of the scattering regime. In the Rayleigh and stochastic regimes, very good agreement is found between the theory and FE results both in terms of the absolute attenuation values and for asymptotic power relationships. In the geometric regime, power relationships are obtained through a combination of dimensional analysis and FE simulations. The results here also provide useful insight into verifying the three-dimensional theory because the method used for its derivation is analogous.
AU  - Sarris,G
AU  - Haslinger,SG
AU  - Huthwaite,P
AU  - Nagy,PB
AU  - Lowe,MJS
DO  - 10.1121/10.0005271
EP  - 4308
PY  - 2021///
SN  - 0001-4966
SP  - 4298
TI  - Attenuation of Rayleigh waves due to surface roughness
T2  - Journal of the Acoustical Society of America
UR  - http://dx.doi.org/10.1121/10.0005271
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000663711800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://asa.scitation.org/doi/10.1121/10.0005271
UR  - http://hdl.handle.net/10044/1/91357
VL  - 149
ER  -
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