On the use of oblique acoustic leakage to measure the wavenumber spectrum of propagating lamb waves

Christopher Hakoda, Mostafa Hasanian, Clifford Jesse Lissenden, III

Research output: Contribution to journalArticle

Abstract

Lamb waves propagating within a waveguide often have similar frequency content. If there are multiple Lamb wave modes with the same frequency content, the wavenumber spectrum can be used to distinguish between them. As a result, the wavenumber spectrum is an important tool for determining the modal content of signals. In this paper, we propose a new method for measuring wavenumber spectra that uses an air-coupled transducer for reception and Snell’s law instead of a fast-Fourier transform. The method employs an angular scan rather than a translational scan. The advantages and disadvantages of the method are discussed along with some suggestions for potential improvements. Finally, experimental results comparing the proposed method to a more conventional method, which used a PVDF transducer, demonstrate the feasibility of the proposed method.

Original languageEnglish (US)
Article number1391
JournalSensors (Switzerland)
Volume19
Issue number6
DOIs
StatePublished - Mar 2 2019

Fingerprint

Lamb waves
Acoustics
Surface waves
Transducers
leakage
Snells law
acoustics
transducers
Fast Fourier transforms
Waveguides
suggestion
Air
waveguides
air
Fourier Analysis
polyvinylidene fluoride

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

@article{d3ee1c84098c48a397b9ea93bba9eb45,
title = "On the use of oblique acoustic leakage to measure the wavenumber spectrum of propagating lamb waves",
abstract = "Lamb waves propagating within a waveguide often have similar frequency content. If there are multiple Lamb wave modes with the same frequency content, the wavenumber spectrum can be used to distinguish between them. As a result, the wavenumber spectrum is an important tool for determining the modal content of signals. In this paper, we propose a new method for measuring wavenumber spectra that uses an air-coupled transducer for reception and Snell’s law instead of a fast-Fourier transform. The method employs an angular scan rather than a translational scan. The advantages and disadvantages of the method are discussed along with some suggestions for potential improvements. Finally, experimental results comparing the proposed method to a more conventional method, which used a PVDF transducer, demonstrate the feasibility of the proposed method.",
author = "Christopher Hakoda and Mostafa Hasanian and {Lissenden, III}, {Clifford Jesse}",
year = "2019",
month = "3",
day = "2",
doi = "10.3390/s19061391",
language = "English (US)",
volume = "19",
journal = "Sensors",
issn = "1424-3210",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "6",

}

On the use of oblique acoustic leakage to measure the wavenumber spectrum of propagating lamb waves. / Hakoda, Christopher; Hasanian, Mostafa; Lissenden, III, Clifford Jesse.

In: Sensors (Switzerland), Vol. 19, No. 6, 1391, 02.03.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - On the use of oblique acoustic leakage to measure the wavenumber spectrum of propagating lamb waves

AU - Hakoda, Christopher

AU - Hasanian, Mostafa

AU - Lissenden, III, Clifford Jesse

PY - 2019/3/2

Y1 - 2019/3/2

N2 - Lamb waves propagating within a waveguide often have similar frequency content. If there are multiple Lamb wave modes with the same frequency content, the wavenumber spectrum can be used to distinguish between them. As a result, the wavenumber spectrum is an important tool for determining the modal content of signals. In this paper, we propose a new method for measuring wavenumber spectra that uses an air-coupled transducer for reception and Snell’s law instead of a fast-Fourier transform. The method employs an angular scan rather than a translational scan. The advantages and disadvantages of the method are discussed along with some suggestions for potential improvements. Finally, experimental results comparing the proposed method to a more conventional method, which used a PVDF transducer, demonstrate the feasibility of the proposed method.

AB - Lamb waves propagating within a waveguide often have similar frequency content. If there are multiple Lamb wave modes with the same frequency content, the wavenumber spectrum can be used to distinguish between them. As a result, the wavenumber spectrum is an important tool for determining the modal content of signals. In this paper, we propose a new method for measuring wavenumber spectra that uses an air-coupled transducer for reception and Snell’s law instead of a fast-Fourier transform. The method employs an angular scan rather than a translational scan. The advantages and disadvantages of the method are discussed along with some suggestions for potential improvements. Finally, experimental results comparing the proposed method to a more conventional method, which used a PVDF transducer, demonstrate the feasibility of the proposed method.

UR - http://www.scopus.com/inward/record.url?scp=85063678239&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063678239&partnerID=8YFLogxK

U2 - 10.3390/s19061391

DO - 10.3390/s19061391

M3 - Article

C2 - 30901842

AN - SCOPUS:85063678239

VL - 19

JO - Sensors

JF - Sensors

SN - 1424-3210

IS - 6

M1 - 1391

ER -