Conference_programme: 23: Structural acoustics and vibration
Lecture: Analysis of Characteristics of Elastic Waves Propagating on a Vibrating Cylindrical Shell at Frequencies around a Ring Frequency
Author(s): Kil Hyun-Gwon, Lee Chan
Summary:
The vibration of a cylindrical shell is generated due to elastic waves propagating on the shell. The wave propagation is governed by a dispersion relation. The assumption of a thin shell allows the dispersion relation to be separated into three relations related to the propagation of flexural waves and two types of membrane waves. Above the ring frequency, those waves are clearly identified as flexural, shear and longitudinal waves. Below the ring frequency, the characteristics of those waves are identified with dependency of the direction of wave propagation. In this paper the dispersion relations are obtained theoretically and experimentally at two frequencies above and below the ring frequencies. The experimental results of the dispersion relations have been obtained by using wavenumber analysis of in-plane surface vibration data obtained experimentally on a point-excited cylindrical shell and are compared with the theoretical results. Those are analyzed to identify the characteristics of waves propagating on the vibrating cylindrical shell at frequencies around the ring frequency.
Corresponding author
Name: Prof Hyun-Gwon Kil
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Country: N/A
