Actively Silencing a Cavity by Acoustic Impedance Changes

1997 ◽  
Author(s):  
O. Lacour ◽  
D. Thenail ◽  
M. A. Galland
Keyword(s):  
Active Control ◽  
Acoustic Impedance ◽  
Fluid Structure Interaction ◽  
Central Point ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Sound Fields ◽  
Source Radiation ◽  
Absorbed Power

Abstract We attempt here the active control of enclosed sound fields via wall impedance changes. The impedance value which is the most efficient in silencing a cavity is the central point of this paper. Simulations and experiments show that the optimal impedance is not necessarily characterized by an large amount of absorbed power. Its silencing effect depends also on its ability to reduce source radiation. Experiments including fluid-structure interaction are also presented.

Numerical study of active control by piezoelectric materials for fluid–structure interaction problems

2018 ◽  
Vol 435 ◽  
pp. 23-35 ◽  
Author(s):  
Shigeki Kaneko ◽  
Giwon Hong ◽  
Naoto Mitsume ◽  
Tomonori Yamada ◽  
Shinobu Yoshimura
Keyword(s):  
Active Control ◽  
Numerical Study ◽  
Piezoelectric Materials ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction

Fluid-Structure Interaction Simulation Considering Active Control

2016 ◽  
Vol 2016.29 (0) ◽  
pp. 075
Author(s):  
Shigeki Kaneko ◽  
Giwon Hong ◽  
Tomonori Yamada ◽  
Shinobu Yoshimura
Keyword(s):  
Active Control ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Simulation

Semi-active control of jacket platforms under wave loads considering fluid-structure interaction

2021 ◽  
Vol 117 ◽  
pp. 102939
Author(s):  
Seyyed Ali Mousavi Gavgani ◽  
Himan Hojat Jalali ◽  
Maziar Fahimi Farzam
Keyword(s):  
Active Control ◽  
Fluid Structure Interaction ◽  
Wave Loads ◽  
Fluid Structure ◽  
Structure Interaction

Local active control for an exterior fluid-structure interaction problem

2017 ◽  
Vol 111 (12) ◽  
pp. 1103-1119
Author(s):  
Catalina Domínguez ◽  
Erwin Hernández ◽  
Ricardo Prato Torres
Keyword(s):  
Active Control ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Problem

Active Control of the Structural and Acoustic Responses of a Fluid-Loaded Plate; Part I: Analysis of the Physical System

1998 ◽  
Vol 17 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Nicole J. Kessissoglou ◽  
Jie Pan
Keyword(s):  
Active Control ◽  
Physical System ◽  
Fluid Structure Interaction ◽  
Infinite Plate ◽  
Structural Response ◽  
Fluid Loading ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Loaded Plate ◽  
Acoustic Responses

The nature of the fluid–loading on a line–driven elastic plate significantly affects the structural and acoustic responses. As the fluid–loading increases, the fluid–structure interaction affects the wave propagation in the structure, as well as both the level and directivity of the sound radiation from the structure into the fluid field. The structural and acoustic responses of a line–force driven infinite plate under various fluid–loading conditions are considered. A detailed understanding of the fluid–structure interaction, including the effects of both heavy and light fluid–loading on the radiated sound pressure, sound power and structural response are clearly illustrated by numerical examples using the exact solution of the system equations. The results from this analysis of the physical system also provide useful information for the design of an active control system to effectively reduce the structural and acoustic responses of the fluid–loaded plate.

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