Mode analysis of Lamb waves in hollow cylinder by means of 2-D Fourier transformation

Author

Zongqi Sun ; Yiwei Mao ; Wenhua Jiang ; De Zhang

Author_Institution

Inst. of Acoust., Nanjing Univ., China

Volume

1

fYear

1999

fDate

17-20 Oct. 1999

Firstpage

831

Abstract

The Lamb wave modes propagating along a hollow cylinder are analyzed by means of two-dimensional (2-D) FFT. The 2-D FFT system consists of a laser probe and a digital oscilloscope. The former implements the spatial and the latter implements the temporal sampling of the waveform. With the aid of this system, the Lamb wave modes propagating along an aluminum alloy tube are analyzed. Comparison between the experiments and calculations shows that the 2-D FFT can be effectively used to analyze quantitatively Lamb wave modes in hollow cylinders.

Keywords

aluminium alloys; fast Fourier transforms; signal sampling; surface acoustic wave signal processing; surface acoustic waves; ultrasonic materials testing; waveform analysis; 2D FFT; Lamb waves; NDT; aluminum alloy tube; digital oscilloscope; gauge condition; hollow cylinder; laser probe; longitudinal wave transducer; mode analysis; spatial sampling; temporal sampling; waveform sampling; Acoustic waves; Boundary conditions; Equations; Frequency; Inspection; Laser modes; Optical propagation; Probes; Sun; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE

Conference_Location

Caesars Tahoe, NV

ISSN

1051-0117

Print_ISBN

0-7803-5722-1

Type

conf

DOI

10.1109/ULTSYM.1999.849525

Filename

849525