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Updated: Jun 4, 2025

Echo Particle Image Velocimetry
Published on: December 27, 2012
Group velocity dispersion curves estimation based on joint processing of sound pressure and vertical particle
Guangxue Zheng1,2,3, Shengchun Piao1,2,3, Yang Dong1,2,3
1National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China.
Abstract:
It is difficult to separate and estimate the intersected group velocity dispersion curves for different normal modes when the frequency is lower than the cutoff frequency of water column. To address this issue, an estimation method based on the joint processing of sound pressure (P) and vertical particle velocity (Vz) is proposed in this paper. Theoretical analysis shows that the amplitudes of P and Vz corresponding to the nth normal mode exhibit a complementary relationship in the certain frequency band, providing a theoretical basis for the method. The feasibility of the method was verified using sea trial data.
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