[1] Chen Dalin, Chen Nan,. Active control of structural sound radiationin an acoustic enclosure consisting of flexible structure [J]. Journal of Southeast University (English Edition), 2014, 30 (3): 318-322. [doi:10.3969/j.issn.1003-7985.2014.03.012]

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Active control of structural sound radiationin an acoustic enclosure consisting of flexible structure()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 3

Page:

318-322

Research Field:

Mathematics, Physics, Mechanics

Publishing date:

2014-09-30

Info

Title:

Active control of structural sound radiationin an acoustic enclosure consisting of flexible structure

Author(s):

Chen Dalin;  Chen Nan

School of Mechanical Engineering, Southeast University, Nanjing 211189, China

Keywords:

active control;  acoustic mode;  radiated noise;  control mechanism;  sound pressure level(SPL)

PACS:

TB535

DOI:

10.3969/j.issn.1003-7985.2014.03.012

Abstract:

The active control of structural sound radiation in an acoustic enclosure is studied by using distributed point force actuators as the secondary control force, and the control mechanisms for the radiated noise in the cavity are analyzed. A rectangular enclosure involving two simply supported flexible plates is created for this investigation. The characteristics of the primary and secondary sound field and the structural-acoustic coupled system are analyzed, and the optimal control objective for reducing the sound pressure level(SPL)in the cavity is derived. The response of the SPL in the cavity is analyzed and compared when the secondary point force actuators with different locations and parameters are applied to the two flexible plates. The results indicate that the noise in the cavity can be better controlled when some point force actuators are applied to two flexible plates for cooperative control rather than the point force actuators being only applied to the excited flexible plate.

References:

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[5] Cui Huaifeng, Chen Nan. Active control of sound radiation and transmission into a cavity consisting of multi-flexible plates [J]. Noise Control Engr J, 2012, 60(5): 492-506.
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[7] Du J T, Li W L, Xu H A. Vibro-acoustic analysis of a rectangular cavity bounded by a flexible panel with elastically restrained edges [J]. Journal of Acoustical Society of America, 2012, 131(4): 2799-2810.
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Memo

Memo:

Biographies: Chen Dalin(1980—), male, graduate; Chen Nan(corresponding author), male, doctor, professor, nchen@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.50975047).
Citation: Chen Dalin, Chen Nan. Active control of structural sound radiation in an acoustic enclosure consisting of flexible structure[J].Journal of Southeast University(English Edition), 2014, 30(3):318-322.[doi:10.3969/j.issn.1003-7985.2014.03.012]

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