Enhancement and Smoothing of Near-Threshold Wood Anomalies in an Acoustic Waveguide
- 作者: Nazarov S.A.1,2
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隶属关系:
- St. Petersburg State University
- Institute of Problems of Mechanical Engineering, Russian Academy of Sciences
- 期: 卷 64, 编号 5 (2018)
- 页面: 535-547
- 栏目: Classical Problems of Linear Acoustics and Wave Theory
- URL: https://journals.rcsi.science/1063-7710/article/view/186656
- DOI: https://doi.org/10.1134/S106377101805007X
- ID: 186656
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详细
A gently sloping perturbation of the rigid wall of a planar acoustic waveguide can cause a Wood anomaly, reflected in an enormously rapid change in the diffraction pattern when the cutoff frequencies are approached from below inside a continuous spectrum. Asymptotic analysis has been used to establish the restrictions imposed on the wall perturbation profile that ensure the appearance, enhancement, or disappearance of the anomaly. The asymptotics of the eigenfrequencies is studied and the complex and threshold resonances are discussed.
作者简介
S. Nazarov
St. Petersburg State University; Institute of Problems of Mechanical Engineering, Russian Academy of Sciences
编辑信件的主要联系方式.
Email: srgnazarov@yahoo.co.uk
俄罗斯联邦, St. Petersburg, 199034; St. Petersburg, 199178
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