ISBN: 978-981-09-5471-0 DOI: 10.18178/wcse.2015.04.076
The Impacts of Structure Position and Size Change on Ultrasonic Transmission Properties
Abstract— Based on the finite differential time-domain (FDTD) method, two types of aluminum
plate samples with one and two circular cavities are established. The ultrasonic transmission signal
and acoustic pressure distribution for samples with different cavity positions (x) and diameters (d)
are obtained through FDTD simulations. The results show that when x is between 6 wavelengths
(15 mm) and 14 wavelengths (35 mm) of the ultrasound, the power of the transmitted ultrasonic
signal increases dramatically for the two cavity diameters of d = 2λ and d = λ. Such an increase is
especially large when the cavity is in the middle and the maximum relative change is about 260%
when d = 2λ. However, the power does not change much with changing x and is close to the sample
with no cavity when d = 0.5λ. It also shows that the transmitted power is weakened for the sample
with two cavities due to the coupling effect between them. These results may have potential use in
ultrasonic detection.
Index Terms— structure position, structure size, ultrasonic detection, FDTD simulation
Jialing Hu, Lei Li, Aiming Ji, Li Sun, Canyan Zhu, Lijun Zhang, Ling-Feng Mao
Institute of Intelligent Structure and System, Soochow University, CHINA
Cite: Jialing Hu, Lei Li, Aiming Ji, Li Sun, Canyan Zhu, Lijun Zhang, Ling-Feng Mao, "The Impacts of Structure Position and Size Change on Ultrasonic Transmission Properties," 2015 The 5th International Workshop on Computer Science and Engineering-Information Processing and Control Engineering (WCSE 2015-IPCE), pp. 461-466, Moscow, Russia, April 15-17, 2015.