Simulation Research on Underwater Non-free Sound Field Reconstruction Based on Normal Mode and Wave Superposition

doi:10.3969/j.issn.1000-1093.2018.02.017

Abstract

Abstract: Considering that amounts of measuring points need to be laid for reconstructing the sound field of large structure, a calculation method of using a horizontal linear array to reconstruct the sound field is proposed. The distribution of circular and straight-line virtual sources is determined from the vibrating velocity of structural surface, and the sound field is reconstructed by using wave superposition method. On this basis, the interpolation iteration method is adopted to improve the reconstruction accuracy under the condition of less measuring points. The influence of the uneven distribution of energy in shallow water channel on reconstruction is corrected according to the principle of normal mode. The reconstruction performance of sound field is analyzed from the aspects of virtual source shape, transmitting or receiving distance, signal frequency and water depth. The theoretical and simulated results show that the proposed method is simple and effective for reconstruction of sound field in the non-free field environment. The distribution of complex virtual source is more adaptable to complex structures. Key

Key words: soundfieldreconstruction, wavesuperposition, normalmode, lineararray

CLC Number:

TB532

ZHOU Si-tong，HE Lin，SHUAI Chang-geng，YANG Jia-xuan. Simulation Research on Underwater Non-free Sound Field Reconstruction Based on Normal Mode and Wave Superposition[J]. Acta Armamentarii, 2018, 39(2): 338-344.

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第39卷
第2期2018 年2月兵工学报ACTA
ARMAMENTARIIVol.39No.2Feb.2018

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