ACTIVE CONTROL OF VIBRATION TRANSMISSION IN A CYLINDRICAL SHELL

1997 ◽  
Vol 203 (3) ◽  
pp. 409-434 ◽  
Author(s):  
X. Pan ◽  
C.H. Hansen
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Vibration Transmission

Active control of vibration transmission in a cylindrical shell

1995 ◽  
Vol 98 (5) ◽  
pp. 2929-2929
Author(s):  
Xia Pan ◽  
Colin H. Hansen
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Vibration Transmission

Influence of Boundary Conditions on the Active Control of Vibration and Sound Radiation for a Circular Cylindrical Shell

2011 ◽  
Vol 66-68 ◽  
pp. 1270-1277
Author(s):  
Lu Dai ◽  
Tie Jun Yang ◽  
Yao Sun ◽  
Ji Xin Liu
Keyword(s):  
Cylindrical Shell ◽  
Boundary Conditions ◽  
Active Control ◽  
Structural Engineering ◽  
Acoustic Radiation ◽  
Circular Cylindrical Shell ◽  
Acoustic Power ◽  
Fourier Series Method ◽  
Vibration And Sound Radiation ◽  
Elastically Restrained

Vibration and acoustic radiation of circular cylindrical shells are hot topics in the structural engineering field. However for a long period, this sort of problems is only limit to classical homogeneous boundary conditions. In this paper, the vibration of a circular cylindrical shell with elastic boundary supports is studied using modified Fourier series method, and the far-field pressure for a baffled shell is calculated by Helmholtz integral equation. Active control of vibration and acoustic radiation are carried out by minimizing structural kinetic energy and radiated acoustic power respectively. The influence of boundary conditions on the active control is investigated throughout several numerical examples. It is shown that the active control of vibration and acoustic for an elastically restrained shell can exhibit unexpected and complicated behaviors.

Active control of low-frequency sound radiation by cylindrical shell with piezoelectric stack force actuators

2012 ◽  
Vol 331 (11) ◽  
pp. 2471-2484 ◽  
Author(s):  
Yin Cao ◽  
Hongling Sun ◽  
Fengyan An ◽  
Xiaodong Li
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Low Frequency ◽  
Sound Radiation ◽  
Frequency Sound

The structural acoustics and active control of interior noise in a ribbed cylindrical shell

1996 ◽  
Vol 99 (6) ◽  
pp. 3497-3512 ◽  
Author(s):  
B. H. Houston ◽  
M. H. Marcus ◽  
J. A. Bucaro ◽  
E. G. Williams ◽  
D. M. Photiadis
Keyword(s):  
Cylindrical Shell ◽  
Active Control ◽  
Interior Noise ◽  
Structural Acoustics

Experimental Study on Vibrational Transmission Characteristics of a Ring-Stiffened Cylindrical Shell Model

2012 ◽  
Vol 226-228 ◽  
pp. 285-289
Author(s):  
Hua Bing Wen ◽  
Yan Yan Zuo ◽  
Zi Long Peng ◽  
Hua Shen
Keyword(s):  
Cylindrical Shell ◽  
Mechanical Vibration ◽  
Evaluation Index ◽  
Transmission Characteristics ◽  
Low Frequencies ◽  
Vibration Transmission ◽  
High Frequencies ◽  
Stiffened Cylindrical Shell ◽  
Structural Style ◽  
The Difference

A ring-stiffened cylindrical shell of experimental model with four equipment support pedestals was designed. The effect of vibr-ation transmission characteristics of the ring-stiffened cylindri-cal shell by the internal base structural style and layout positi-on was researched. The original mechanical admittances of su-pport pedestals were analyzed. Taking mechanical vibration ve-locity mobility as evaluation index, the vibration transmission characteristics from pedestals to the surface of ring-stiffened cylindrical shell have been experimentally studied, the mecha-nical admittance distribution pattern of the cylindrical shell sur-face has been indicated. The difference of mechanical admitt-ances at different positions is large at low frequencies, which is influenced by the mode shape of vibration of the shell struc-ture. However, the difference of mechanical admittances of dif-ferent positions is little at high frequencies, and the vibration transmission characteristics from pedestals to cylindrical shell can be indicated by the concept of spatial equivalent mecha-nical mobility.

Active control of cylindrical shell with magnetostrictive layer

2003 ◽  
Vol 262 (3) ◽  
pp. 577-589 ◽  
Author(s):  
J.S Kumar ◽  
N Ganesan ◽  
S Swarnamani ◽  
Chandramouli Padmanabhan
Keyword(s):  
Cylindrical Shell ◽  
Active Control

ACTIVE CONTROL OF A MACHINE SUSPENSION SYSTEM SUPPORTED ON A CYLINDRICAL SHELL

2013 ◽  
Vol 21 (03) ◽  
pp. 1350012
Author(s):  
X. LIU ◽  
G. JIN ◽  
Y. WANG ◽  
Y. SHI ◽  
X. FENG
Keyword(s):  
Cylindrical Shell ◽  
Numerical Simulations ◽  
Active Control ◽  
Numerical Study ◽  
Control Strategies ◽  
Acoustic Power ◽  
Suspension System ◽  
Sound Power ◽  
Control Force ◽  
Power Minimization

A numerical study on the active control of a machine suspension system supported on a cylindrical shell aiming to reduce the sound radiation is presented in this paper. In this system, a rigid-body machine is supported on a simply-supported elastic cylindrical shell through four active isolators. A theoretical model is employed and four types of active control strategies including kinetic energy minimization strategy, power flow minimization strategy, squared acceleration minimization strategy and acoustic power minimization strategy are considered, with corresponding active control force obtained by linear quadratic optimal method. Numerical simulations are conducted and detailed results were presented. Active control performance under these four control strategies is compared and analyzed in terms of radiated sound power, and the effect of the number of active actuators is discussed by numerical analysis. The results show that acoustic power minimization strategy has the best performance to reduce the sound power radiated from supporting shell in general. Through numerical simulations, some comprehensive design principles of active control system are discussed at the end.

Active control of vibration transmission through struts

1998 ◽  
Author(s):  
Ion Pelinescu ◽  
Balakumar Balachandran
Keyword(s):  
Active Control ◽  
Vibration Transmission
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