Applicability and reliability of an experimental method measuring underwater acoustic radiation efficiency of floating box-type plate structures in a reverberant water tank

• Published in: International journal of naval architecture and ocean engineering 2023, 15(0), , pp.1-12
• Main Authors: Lee, Joo-Yeob, Kim, Kookhyun, Park, Sung-Ju, Cho, Dae-Seung
• Format: Article
• Language: English
• Subjects: Experimental method; Floating plate structure; Numerical validation; Reverberant water tank; Underwater acoustic radiation efficiency; 조선공학
• ISSN: 2092-6782; 2092-6790
• DOI: 10.1016/j.ijnaoe.2023.100553

This paper aims to investigate the applicability and reliability of an experimental method measuring the underwater acoustic radiation efficiencies of floating plate structures in a reverberant water tank. For the purpose, an experimental method for estimating the acoustic power of a source in a reverberant sound field has been introduced and applied to measure the acoustic radiation efficiencies of two floating box-type plate structures excited by a logarithmic sine sweeping force in a water tank. The validity of the adopted experimental method has been examined by the comparison with numerical results obtained by a fully coupled vibroacoustic analysis with an infinite radiation boundary condition for the structures. From the results, it is confirmed that the experimental method for measuring the underwater acoustic radiation efficiency of floating plate structures in a reverberant water tank is reliably applicable for high-frequency ranges above the Schroeder frequency of the water tank. •Acoustic radiation efficiencies of two floating box-type structures are investigated.•Experiments are performed using a reverberant water tank.•Measurands via experiments are simultaneously obtained to enhance reliability.•Validity of the experimental method is examined by comparing with FEA results.•Adopted experimental method is reliably applicable above the Schroeder frequency.