Zobrazeno 1 - 10
of 37
pro vyhledávání: '"J. B. Lawrie"'
Publikováno v:
Journal of Sound and Vibration
Journal of Sound and Vibration, Elsevier, 2021, pp.116510. ⟨10.1016/j.jsv.2021.116510⟩
Journal of Sound and Vibration, Elsevier, 2021, pp.116510. ⟨10.1016/j.jsv.2021.116510⟩
This study focuses on sound attenuation in a two-dimensional waveguide with arbitrary admittance boundary conditions on both sides of the guide. The emphasis is on understanding the formation and potential applications of the exceptional points (EPs)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::826ea9b2831ee795e2ad7daa1b4d225f
https://hal.archives-ouvertes.fr/hal-03388773/file/EP3_Green_jsv2021.pdf
https://hal.archives-ouvertes.fr/hal-03388773/file/EP3_Green_jsv2021.pdf
Autor:
J. B. Lawrie
Publikováno v:
The Journal of the Acoustical Society of America. 131:1890-1901
This is the post-print version of the Article. The official published version can be accessed from the links below - Copyright @ 2012 Acoustical Society of America The focus of this article is toward the development of hybrid analytic-numerical mode-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57e585ae88df8a4fb9ae3e13684344ac
https://doi.org/10.1121/1.3683256
https://doi.org/10.1121/1.3683256
Autor:
J. B. Lawrie, I. David Abrahams
Publikováno v:
Mathematics and Mechanics of Solids. 17:43-58
Smart structures are components used in engineering applications that are capable of sensing or reacting to their environment in a predictable and desired manner. In addition to carrying mechanical loads, smart structures may alleviate vibration, red
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0acf36e5d67b5d520bd4efd725272da
https://doi.org/10.1177/1081286511412441
https://doi.org/10.1177/1081286511412441
Autor:
Julius Kaplunov, J. B. Lawrie
Publikováno v:
Mathematics and Mechanics of Solids. 17:4-16
Over 50 years have elapsed since the first experimental observations of dynamic edge phenomena on elastic structures, yet the topic remains a diverse and vibrant source of research activity. This article provides a focused history and overview of suc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3c33bc987cacea1c4e31ee9420b15ed
https://doi.org/10.1177/1081286511412281
https://doi.org/10.1177/1081286511412281
Autor:
J. B. Lawrie
Publikováno v:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 465:2347-2367
An exact expression for the fluid-coupled structural waves that propagate in a three-dimensional, rectangular waveguide with elastic walls is presented in terms of the non-separable eigenfunctions ψ n ( y , z ). It is proved that these eigenfunction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::329ebc9db445db293958af573c180c9a
https://doi.org/10.1098/rspa.2009.0066
https://doi.org/10.1098/rspa.2009.0066
Autor:
Muhammad Afzal, J. B. Lawrie
This article is concerned with the reflection and transmission of fluid-structure cou- pled waves at the junction between two flexible waveguides of different heights. Unlike previous studies, in which the waveguides are joined at the height disconti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a64ebb9f4147a02b7919aa51cc98e179
http://bura.brunel.ac.uk/handle/2438/13402
http://bura.brunel.ac.uk/handle/2438/13402
Autor:
I. David Abrahams, J. B. Lawrie
Publikováno v:
Journal of Engineering Mathematics. 59:351-358
It is a little over 75 years since two of the most important mathematicians of the 20th century collaborated on finding the exact solution of a particular equation with semi-infinite convolution type integral operator. The elegance and analytical sop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a05681b0a9feeb28e452507c38612a17
https://doi.org/10.1007/s10665-007-9195-x
https://doi.org/10.1007/s10665-007-9195-x
Autor:
J. B. Lawrie, Idil M. M. Guled
Publikováno v:
The Journal of the Acoustical Society of America. 120:780-790
A mode-matching method is used to investigate the performance of a two-dimensional, modified reactive silencer. The modification takes the form of a membrane which is attached to the internal walls of the expansion chamber parallel to the axis of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89bc8f403399aa117b0a978a25a5919f
https://doi.org/10.1121/1.2213571
https://doi.org/10.1121/1.2213571
Autor:
J. B. Lawrie, Ray Kirby
Publikováno v:
The Journal of the Acoustical Society of America. 119:2050-2061
This article presents an analytic mode-matching approach suitable for modelling the propagation of sound in a two-dimensional, three-part, ducting system. The approach avoids the need to find roots of the characteristic equation for the middle sectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fbd3bdb5d60d15ac8b13add6ba26e95
https://doi.org/10.1121/1.2172168
https://doi.org/10.1121/1.2172168
Publikováno v:
Wave Motion. 36:119-142
The scattering of acoustic waves at the discontinuity between two ducts of different heights is considered. At least one of the ducts is bounded by a membrane and, thus, the underlying eigenproblem is non-Sturm–Liouville . A mode-matching procedure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8278bdfc2308cf24e09becdc5ebe1e18
https://doi.org/10.1016/s0165-2125(02)00005-7
https://doi.org/10.1016/s0165-2125(02)00005-7