Analytical and experimental study on active control of structurally radiated sound from an elastic cylindrical shell.

2010 ◽  
Vol 128 (4) ◽  
pp. 2317-2317
Author(s):  
Guoyong Jin ◽  
Shuangxia Shi
Keyword(s):  
Experimental Study ◽  
Cylindrical Shell ◽  
Active Control ◽  
Elastic Cylindrical Shell ◽  
Radiated Sound

Active control of structurally radiated sound from an elastic cylindrical shell

2011 ◽  
Vol 10 (1) ◽  
pp. 88-97 ◽  
Author(s):  
Guoyong Jin ◽  
Xiaolin Liu ◽  
Zhigang Liu ◽  
Tiejun Yang
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Elastic Cylindrical Shell ◽  
Radiated Sound

Active control of radiated sound power of a smart cylindrical shell based on radiation modes

2016 ◽  
Vol 114 ◽  
pp. 218-229 ◽  
Author(s):  
Ali Loghmani ◽  
Mohammad Danesh ◽  
Moon K. Kwak ◽  
Mehdi Keshmiri
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Sound Power ◽  
Radiated Sound ◽  
Radiated Sound Power

Theoretical and experimental study of a thin elastic cylindrical shell subjected to a point source

2016 ◽  
Vol 139 (4) ◽  
pp. 2052-2052
Author(s):  
Soheil Shah-Hosseini ◽  
Fernand Leon ◽  
Farid Chati ◽  
Dominique Decultot ◽  
Gerard Maze
Keyword(s):  
Experimental Study ◽  
Cylindrical Shell ◽  
Point Source ◽  
Elastic Cylindrical Shell ◽  
Thin Elastic Cylindrical Shell

Attenuation of Structurally Radiated Sound from an Elastic Cylindrical Shell by Local Vibration Control

2010 ◽  
Vol 450 ◽  
pp. 494-497
Author(s):  
Guo Yong Jin ◽  
Shuang Xia Shi ◽  
Zhi Gang Liu
Keyword(s):  
Cylindrical Shell ◽  
Vibration Control ◽  
Control Process ◽  
Elastic Cylindrical Shell ◽  
Local Vibration ◽  
Acoustic Control ◽  
Resonance Frequencies ◽  
Radiated Sound ◽  
Performance Results ◽  
Good Agreement

This paper presents a numerical and experimental study on attenuation of structurally radiated sound from an elastic cylindrical shell by local vibration control. An analytical model is developed for the active structural acoustic control (ASAC) of the cylindrical shell. A local control strategy is considered by minimization of the mean-square velocity of finite discrete locations. Numerical simulations are performed to examine and analyze the control performance. Results show that global sound attenuation of the cylindrical shell can be obtained at resonance frequencies. However, control spillover may occur at off-resonance frequencies. Modal suppression and rearrangement mechanisms may be involved in the control process. ASAC experiment was implemented by FXLMS algorithm, good agreement was observed between the numerical and experimental results, and successful attenuation of radiated sound was achieved.

scholarly journals Investigation of Low-Frequency Sound Radiation Characteristics and Active Control Mechanism of a Finite Cylindrical Shell

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Shaohu Ding ◽  
Chunyang Mu ◽  
Yang Gao ◽  
Hong Liu ◽  
Maoqiang Li
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Physical Mechanism ◽  
Sound Power ◽  
Radiation Characteristics ◽  
Low Frequencies ◽  
Acoustic Control ◽  
Radiated Sound ◽  
Finite Cylindrical Shell ◽  
Structural Acoustic Control

In this paper, the radiation characteristics and active structural acoustic control of a submerged cylindrical shell at low frequencies are investigated. First, the coupled vibro-acoustic equations for a submerged finite cylindrical shell are solved by a modal decomposition method, and the radiation impedance is obtained by the fast Fourier transform. The modal shapes of the first ten acoustic radiation modes and the structure-dependent radiation modes are presented. The relationships between the vibration modes and the radiation modes as well as the contributions of the radiation modes to the radiated sound power are given at low frequencies. Finally, active structural acoustic control of a submerged finite cylindrical shell is investigated by considering the fluid-structure coupled interactions. The physical mechanism of the active control is discussed based on the relationship between the vibration and radiation modes. The results showed that, at low frequencies, only the first several radiation modes contributed to the sound power radiated from a submerged finite cylindrical shell excited by a radial point force. By determining the radiation modes that dominate the contribution to the radiated sound, the physical mechanism of the active control is explained, providing a potential tool to allow active control of the vibro-acoustic responses of submerged structures more effectively.

Numerical and experimental study of an active control logic for modifying the acoustic performance of single-layer panels

2021 ◽  
pp. 116608
Author(s):  
Francesco Ripamonti ◽  
Anthony Giampà ◽  
Riccardo Giona ◽  
Ling Liu ◽  
Roberto Corradi
Keyword(s):  
Experimental Study ◽  
Active Control ◽  
Single Layer ◽  
Control Logic ◽  
Acoustic Performance
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