Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/77536
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Mechanical Engineering | en_US |
dc.creator | Huang, W | en_US |
dc.creator | Ji, H | en_US |
dc.creator | Qiu, J | en_US |
dc.creator | Cheng, L | en_US |
dc.date.accessioned | 2018-08-28T01:33:03Z | - |
dc.date.available | 2018-08-28T01:33:03Z | - |
dc.identifier.issn | 0022-460X | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/77536 | - |
dc.language.iso | en | en_US |
dc.publisher | Academic Press | en_US |
dc.rights | © 2017 Elsevier Ltd. All rights reserved. | en_US |
dc.rights | © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. | en_US |
dc.rights | The following publication Huang, W., Ji, H., Qiu, J., & Cheng, L. (2018). Analysis of ray trajectories of flexural waves propagating over generalized acoustic black hole indentations. Journal of Sound and Vibration, 417, 216-226 is available at https://doi.org/10.1016/j.jsv.2017.12.012. | en_US |
dc.subject | Acoustic black hole | en_US |
dc.subject | Flexural wave | en_US |
dc.subject | Focalization | en_US |
dc.subject | Ray trajectories | en_US |
dc.title | Analysis of ray trajectories of flexural waves propagating over generalized acoustic black hole indentations | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.spage | 216 | en_US |
dc.identifier.epage | 226 | en_US |
dc.identifier.volume | 417 | en_US |
dc.identifier.doi | 10.1016/j.jsv.2017.12.012 | en_US |
dcterms.abstract | An Acoustic Black Hole (ABH) indentation embedded in thin-walled structures has been proved remarkably useful for broadband flexural wave focalization, in which the phase velocity of the flexural waves and the refractive index of the media undergo gradual changes from the outside towards the center of the indentation. A generalized two-dimensional ABH indentation can be defined by three geometric parameters: a power index, an extra thickness and a radius of a plateau at the indentation center. The dependence of the energy focalization on these parameters as well as the energy focalization process is of paramount importance for the understanding and design of effective ABH indentations. This work aims at investigating the energy focalization characteristics of flexural waves in such generalized ABH indentations. The calculation of the flexural ray trajectories is conducted to reveal and analyze the wave propagation features through numerical integration of the eikonal equation from the Geometric Acoustics Approximation (GAA). The theoretical results are verified by both experiment using wave visualization technique based on laser acoustic scanning method and finite element (FE) simulations. Finally, the influence of the geometric parameters on the flexural wave focalization characteristics in ABH indentations is discussed in detail. | en_US |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Journal of sound and vibration, 17 Mar. 2018, v. 417, p. 216-226 | en_US |
dcterms.isPartOf | Journal of sound and vibration | en_US |
dcterms.issued | 2018-03-17 | - |
dc.identifier.isi | WOS:000426148200014 | - |
dc.identifier.scopus | 2-s2.0-85041502352 | - |
dc.identifier.eissn | 1095-8568 | en_US |
dc.identifier.rosgroupid | 2017006336 | - |
dc.description.ros | 2017-2018 > Academic research: not refereed > Publication in policy or professional journal | en_US |
dc.description.validate | 201808 bcrc | en_US |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | ME-0673 | - |
dc.description.fundingSource | RGC | en_US |
dc.description.fundingSource | Others | en_US |
dc.description.fundingText | National Natural Science Foundation of China; National Natural Science Foundation of Jiangsu Province; Aeronautical Science Fund; Fundamental Research Funds for the Central Universities | en_US |
dc.description.pubStatus | Published | en_US |
dc.identifier.OPUS | 6816645 | - |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Cheng_Analysis_Ray_Trajectories.pdf | Pre-Published version | 2.83 MB | Adobe PDF | View/Open |
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