Journal ArticleDOI
Spectra of transient waves in elastic plates
Richard L. Weaver,Yih‐Hsing Pao +1 more
Reads0
Chats0
TLDR
In this paper, a simple formula is developed for the interference pattern of the spectra of two or more modes of progressing waves, which is then applied to interpret the complex frequency spectra over a wide range of frequency.Abstract:
Frequency spectra of transient Rayleigh–Lamb waves in a plate are evaluated by two methods, a direct numerical integration (FFT), and an asymptotic calculation of the theoretical responses. A simple formula is developed for the interference pattern of the spectra of two or more modes of progressing waves, which is then applied to interpret the complex frequency spectra of the waves in a plate over a wide range of frequency. These interpretive techniques may be applicable to source characterization of acoustic emission.read more
Citations
More filters
Journal ArticleDOI
Local vibration of an elastic plate and zero-group velocity Lamb modes
TL;DR: It is shown that ZGV Lamb modes appear in a range of Poisson's ratio about the value for which the cutoff frequency curves of modes belonging to the same family intercept, i.e., for a bulk wave velocity ratio equal to a rational number.
A wavelet transform applied to acoustic emission signals: part 1: source identification #
M. A. Hamstad,J. Gary +1 more
TL;DR: In this article, a database of wideband acoustic emission (AE) modeled signals was used to examine the application of a wavelet transform (WT) to identify AE sources, and the effects of propagation distance, AE source type, and depth of the AE source below the plate surface were examined.
Journal ArticleDOI
Wave motion in an isotropic elastic layer generated by a time-harmonic point load of arbitrary direction
Jan Drewes Achenbach,Yi Xu +1 more
TL;DR: In this article, the wave motion in an infinite elastic layer due to the application of a time-harmonic point load of arbitrary direction, applied either internally or on one of the faces of the layer, is expressed as a sum of four expansions in Lamb-wave modes and horizontally polarized wave modes.
Journal ArticleDOI
Diffuse waves in finite plates
TL;DR: In this article, the authors show that the diffuse field assumption of room acoustics leads to a relationship between the total spectral energy density of a linear elastic wave disturbance in a finite plate and the power density as observed on the surface.
Journal ArticleDOI
Transient Elastic Waves in a Transversely Isotropic Plate
TL;DR: In this article, the elastodynamic response of a plate with the axis of transverse isotropy normal to the plate surface is calculated by double numerical inverse transforms, a method particularly well-suited for calculations of responses in the near field of layered structures.