Ultrasonic pulse propagation in inhomogeneous one-dimensional media
作者:
N. Cretu,
P. P. Delsanto,
G. Nita,
C. Rosca,
M. Scalerandi,
I. Sturzu,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1998)
卷期:
Volume 104,
issue 1
页码: 57-63
ISSN:0001-4966
年代: 1998
DOI:10.1121/1.423283
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The propagation of acoustic or ultrasonic pulses and waves in 1-D media with continuous inhomogeneities due to spatial variations in density, Young modulus, and/or cross section of the propagation medium is discussed. A semianalytical approach leads to a general form of the solution, which can be described by a function, whose Taylor expansion is absolutely convergent. The special case of a periodic inhomogeneity is studied in detail and the dispersion law is found. It is also shown that a finite width pulse is generally not broken down by the inhomogeneity, even though its law of motion is perturbed. A numerical treatment based on the Local Interaction Simulation Approach (LISA) is also considered, and the results of the simulations compared with the semianalytical ones.
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