Abstract
In order to predict acoustic radiation from a structure in waveguide, a method based on wave superposition is proposed, in which the free-space Green’s function is used to match the strength of equivalent sources. In addition, in order to neglect the effect of sound reflection from boundaries, necessary treatment is conducted, which makes the method more efficient. Moreover, this method is combined with the sound propagation algorithms to predict the sound radiated from a cylindrical shell in waveguide. Numerical simulations show the effect of how reflections can be neglected if the distance between the structure and the boundary exceeds the maximum linear dimension of the structure. It also shows that the reflection from the bottom of the waveguide can be approximated by plane wave conditionally. The proposed method is more robust and efficient in computation, which can be used to predict the acoustic radiation in waveguide.
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Foundation item: Supported by the National Natural Science Foundation of China under Grant No. 11274080, and the Young Scientists Fund of the National Natural Science Foundation of China under Grant No. 11404313.
Hongyang Chen was born in 1984, Hubei, China. He is a doctor of the Science and Technology on Underwater Acoustic Laboratory at Harbin Engineering University, and works in the Key Laboratory of China Ship Development and Design Center. His research interests include acoustic radiation, structural vibration, wave propagation, scattering and acoustical holography.
Qi Li was born in 1958. He is head at the Underwater Acoustic Laboratory, Harbin Engineering University. He worked at the College of Underwater Acoustics, Harbin Engineering University from 1982 to 1993. He was a professor at Ocean University of China from 1993 to 2003. Then, he has been a professor at the College of Underwater Acoustics, Harbin Engineering University since 2003. He has presided national research projects including reverberation, scattering, wave propagation, sound measurement, structural acoustics, hydrodynamic noise, etc.
Dejiang Shang was born in 1969. He finished the postdoctoral research in the Academia Sinica in 2002. Since 2005, he has been a professor and PhD supervisor at Harbin Engineering University. He has received several awards and presided over twenty research projects, including the National Basic Research Program of China, the National High Technology Research and Development Program of China.
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Chen, H., Li, Q. & Shang, D. Fast prediction of acoustic radiation from a hemi-capped cylindrical shell in waveguide. J. Marine. Sci. Appl. 13, 437–448 (2014). https://doi.org/10.1007/s11804-014-1270-x
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DOI: https://doi.org/10.1007/s11804-014-1270-x