A Combined Finite Element Method with Normal Mode for the Elastic Structural Acoustic Radiation in Shallow Water-Reference-Cited by-同舟云学术

A Combined Finite Element Method with Normal Mode for the Elastic Structural Acoustic Radiation in Shallow Water

Published:2020-09-19 Issue:04 Volume:28 Page:2050004
ISSN:2591-7285
Container-title:Journal of Theoretical and Computational Acoustics
language:en
Short-container-title:J. Theor. Comp. Acout.

Author:

An Buchao¹²³,Zhang Chao¹²³,Shang Dejiang¹²³,Xiao Yan¹²³,Khan Imran Ullah¹²³

Affiliation:

1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

2. Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, P. R. China

3. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, P. R. China

Abstract

A combined Finite Element Method with Normal Mode (FEM-NM) is proposed for calculation of the acoustic field radiated by a three-dimensional structural source in shallow water. The FEM is used to calculate the near range acoustic field, then the modes expansion at the vertical and azimuthal direction is performed at a certain coupling range. Hence, the true three-dimensional acoustic field at any range is obtained rapidly by the NM theory. The numerical examples show the efficiency and accuracy of this method. The coupling range and the truncation of the vertical modes hardly affect the far field results.

Publisher

World Scientific Pub Co Pte Lt

Subject

Applied Mathematics,Computer Science Applications,Acoustics and Ultrasonics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S2591728520500048

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