ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Radiation from finite cylindrical shell with irregular-shaped acoustic enclosure |
De-Sen Yang(杨德森)1,2, Rui Zhang(张睿)2, Sheng-Guo Shi(时胜国)1,2 |
1 Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China;
2 College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China |
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Abstract In practical situations, large machinery is usually placed in an underwater vessel and changes the acoustic enclosure shape into an irregular one. The existence of machinery causes the difficulties in expressing sound transmission and radiation analytically. In this study, the sound radiation of a cylindrical shell excited by an internal acoustic source is modeled and analyzed. The cylindrical shell contains a machine modeled as a rectangular object, which is attached to a shell with a spring-mass system. The acoustic field of the cavity is computed by the integro-modal approach. The effect of object size on the coupling between acoustic mode and structural mode is investigated. The relationship between object volume and sound radiation is also studied. Numerical results show that the existence of objects inside vessels leads to a more effective coupling between the structure and acoustic enclosure than the existence of no objects in a regular-shaped cavity (i.e. empty vessel).
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Received: 15 March 2018
Revised: 21 July 2018
Accepted manuscript online:
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PACS:
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43.30.+m
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(Underwater sound)
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43.40.+s
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(Structural acoustics and vibration)
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43.20.Tb
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(Interaction of vibrating structures with surrounding medium)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61601149) and the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (Grant No. IRT_16R17). |
Corresponding Authors:
Sheng-Guo Shi
E-mail: shishengguo@hrbeu.edu.cn
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Cite this article:
De-Sen Yang(杨德森), Rui Zhang(张睿), Sheng-Guo Shi(时胜国) Radiation from finite cylindrical shell with irregular-shaped acoustic enclosure 2018 Chin. Phys. B 27 104301
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