10.14489/td.2015.011.pp.018-028

2015, 11 November

DOI: 10.14489/td.2015.011.pp.018-028

Nesmashny E.V., Kazakov N.A., Karlov S.A.
EXCITATION OF LAMB WAVES OF AE SOURCES AND ANALYSIS OF AMPLITUDE DISPERSION OF SURFACE SHIFTS OF SHEET CONSTRUCTIONS
(pp. 18-28)

Abstract. It is analyzed the amplitude of frequency-geometric dispersion with main modes Nt , Nl , s0 and a0 of Lamb waves in sheets with examples of their excitation. The algorithm for calculating a variance of mode amplitudes of any order is given. It is found that in both cases the amplitude of excitation of the transverse mode Nt and mode s0 of Lamb waves is greater than the other major modes.

Keywords: acoustic emission, wave mode, phase speed, volume and superficial waves, dispersion, Lamb's problem, excitation of waves, wedge method, imitator AE.

+ - About the Authors Click to collapse

E. V. Nesmashny, N. A. Kazakov, S. A. Karlov
Krylov State Research Centre, Saint Petersburg, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Nesmashnyi E. V., Kazakov N. A. (2012). Analysis of the frequency-velocity dispersion and geometrical ampli-tudes of lamb waves in relation to the problems of acoustic-emission diagnostics sheet structures. Kontrol'. Diagnostika, (8), pp. 5-11.
2. Viktorov I. A. (1966). Physical basis of using of ultrasonic Rayleigh waves and Lamb waves in engineering. Moscow: Nauka.
3. Sivukhin D. V. (1955). Diffraction of a plane sound wave in a spherical cavity. Akusticheskii zhurnal. Vol. 1, pp. 78-88.
4. Kol'skii G. (1955). The stress waves in solids. Moscow: IIL.
5. Klyuev V. V. (Ed.), Ivanov V. I., Vlasov I. E. (2006). Nondestructive testing. Handbook. In 8 volumes. Volume 7. Book 1. Method of acoustic emsission. Moscow: Mashino-stroenie.
6. Brekhovskikh L. M. (1973). Waves in layered media. Moscow: Nauka.
7. Guguev P. V., Gumeniuk V. A., Kazakov N. A., Nesmashnyi E. V. (2008). The study of radiation signals from acoustic emission in deformable solid body. Kontrol'. Diagnostika, (10), pp. 21-29.
8. Mezon U. (Ed.), Miker T., Meittsler A. (1966). Physical acoustics. Vol. 1. Part А. Waveguide propagation in extended cylinders and plates. Moscow: Mir, pp. 140-203.

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

DOI: 10.14489/td.2015.011.pp.018-028

Copy the article DOI and follow the link https://id-spektr.ru/product/pokupka-elektronnoy-stati-iz-zhurnala-kontrol-diagnostika

Please specify the article DOI in the order comments.