scholarly journals Active control of sound radiation from a simply supported beam: Influence of bending near‐field waves

1993 ◽  
Vol 93 (5) ◽  
pp. 2716-2725 ◽  
Author(s):  
C. Guigou ◽  
C. R. Fuller
Keyword(s):  
Active Control ◽  
Near Field ◽  
Sound Radiation ◽  
Simply Supported Beam ◽  
Simply Supported

Active Control of Low-Frequency Sound Radiation From Vibrating Panel Using Planar Sound Sources

2001 ◽  
Vol 124 (1) ◽  
pp. 2-9 ◽  
Author(s):  
Kean Chen ◽  
Gary H. Koopmann
Keyword(s):  
Active Control ◽  
Near Field ◽  
Low Frequency ◽  
Sound Radiation ◽  
Sound Field ◽  
Sound Power ◽  
Frequency Range ◽  
Sound Sources ◽  
Frequency Sound ◽  
Secondary Sources

Active control of low frequency sound radiation using planar secondary sources is theoretically investigated in this paper. The primary sound field originates from a vibrating panel and the planar sources are modeled as simply supported rectangular panels in an infinite baffle. The sound power of the primary and secondary panels are calculated using a near field approach, and then a series of formulas are derived to obtain the optimum reduction in sound power based on minimization of the total radiate sound power. Finally, active reduction for a number of secondary panel arrangements is examined and it is concluded that when the modal distribution of the secondary panel does not coincide with that of the primary panel, one secondary panel is sufficient. Otherwise four secondary panels can guarantee considerable reduction in sound power over entire frequency range of interest.

Near field sound radiation from simply supported rectangular plates

1995 ◽  
Vol 185 (3) ◽  
pp. 455-471 ◽  
Author(s):  
T. Takahagi ◽  
M. Nakai ◽  
Y. Tamai
Keyword(s):  
Near Field ◽  
Sound Radiation ◽  
Rectangular Plates ◽  
Simply Supported ◽  
Near Field Sound ◽  
Field Sound

Active Control of Sound Radiation Into an Enclosure Using Different Number of Actuators

2013 ◽  
Vol 313-314 ◽  
pp. 1299-1303
Author(s):  
Huai Feng Cui ◽  
Nan Chen
Keyword(s):  
Potential Energy ◽  
Active Control ◽  
Noise Level ◽  
Sound Radiation ◽  
Coupled System ◽  
Point Force ◽  
Contour Plot ◽  
Control Mechanisms ◽  
Simply Supported ◽  
Flexible Plates

This paper presents an investigation into the active control of structural-acoustic coupled system of a rectangular enclosure involving two simply supported flexible plates. One of the two plates is driven by a point force. The locations of actuators are determined by considering contour plot of the optimal potential energy. The control mechanisms for this enclosure are analyzed when one, two and three actuators are applied on one of the plates. Results obtained demonstrate that the control mechanisms for Panelaare always modal restructuring; those for Panelbare dominantly modal suppression when a different number of actuators is applied to reduce the noise level.

scholarly journals Study on the improvement of the torsional bracing system designing process for steel shaped I simply supported beam bridge

2021 ◽  
Vol 682 (1) ◽  
pp. 012045
Author(s):  
K V Nguyen ◽  
C A L Huynh ◽  
H D H Nguyen ◽  
N D Van ◽  
N T Nguyen ◽  
...  
Keyword(s):  
Simply Supported Beam ◽  
Simply Supported ◽  
Bracing System ◽  
Beam Bridge
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