Active attenuation of sound transmission through a soft-core sandwich panel into an acoustic enclosure using volume velocity cancellation

Sahu, Kiran Chandra; Tuhkuri, Jukka; Reddy, J. N.

doi:10.1177/0954406215569896

Cited by 10 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiplying the mode shape equation (13) with equations (22) and (23) and integrating over the area of the panel, and applying Fourier transformation with some algebraic manipulations, the velocities of panels 1 and 2 can be obtained as,…”

Section: Structural-acoustics Coupled Modelingmentioning

confidence: 99%

Section: Formulation Of Panel Volume Velocitymentioning

confidence: 99%

“…It has been found that the volume velocity control strategy is able to attenuate large amount of sound power. 21,22 However, this strategy is less effective at higher frequencies because of the number of sensors required for reasonable attenuation, in many situations, is too large for practical purposes. 23–26 A recent control metric, termed composite velocity (also referred to as weighted sum of spatial gradients or WSSG) has shown promise in resolving these issues.…”

Section: Motivation and Backgroundmentioning

confidence: 99%

“…Volume velocity of a panel can be determined by the summation of the product of velocity and the corresponding elemental area of each element where the volume velocity sensors are located. Therefore, the volume velocity of each element where the volume velocity sensors are located can be written as, 21–23 where Q is the net complex volume velocity, ax=a/aNsxNsx and by=b/bNsyNsy, where Nsx and Nsy are the number of sensors placed in X and Y directions, respectively. So, the optimal secondary source strength can be found by minimizing the square of the volume velocity.…”

Section: Modelingmentioning

confidence: 99%

See 3 more Smart Citations

Active structural acoustic control of transmitted sound through a double panel partition by weighted sum of spatial gradients

Sahu

Tuhkuri

2017

Journal of Low Frequency Noise, Vibration and Active Control

Self Cite

View full text Add to dashboard Cite

Active control of harmonic sound transmission through an acoustically baffled, rectangular, simply supported double panel partition has been analytically studied. Velocity potential method is used for the vibro-acoustic modeling unlike the commonly used cavity mode method. It is very well-known that at high frequencies uncontrolled double panel partition mostly radiates sound due to the dipole-type motion of the radiating panel, which the volume velocity method can't be able to detect, therefore, weighted sum of spatial gradients is used to control these modes and achieves sound attenuation in a broad frequency band. A piezoceramic actuator (lead zirconate titanate) is attached on one side of the panel surface, and the optimal magnitude and phase of the voltage supplied to the lead zirconate titanate for minimizing the weighted sum of spatial gradients and volume velocity at the error sensor locations are calculated using a simple-gradient based algorithm. Numerical results of sound power transmission ratio and averaged quadratic velocity of panels indicate that lead zirconate titanate should be placed on the incident panel and minimization of the control quantities should be done on the radiating panel to achieve better sound attenuation. The acoustic radiation mode analysis shows that the weighted sum of spatial gradients is able to control multiple acoustic radiation modes and, thereby, accomplishes better reduction of sound power transmission compared to volume velocity.

show abstract

Section: Structural-acoustics Coupled Modelingmentioning

confidence: 99%

Section: Formulation Of Panel Volume Velocitymentioning

confidence: 99%

Section: Motivation and Backgroundmentioning

confidence: 99%

Section: Modelingmentioning

confidence: 99%

See 2 more Smart Citations

Active structural acoustic control of transmitted sound through a double panel partition by weighted sum of spatial gradients

Sahu

Tuhkuri

2017

Journal of Low Frequency Noise, Vibration and Active Control

Self Cite

View full text Add to dashboard Cite

show abstract

“…Sahu et al. [39] used point force and uniformly distributed force actuators for broad-band active control of harmonic sound transmitted through a soft-core sandwich rectangular panel into a backing rectangular enclosure, based on the volume velocity cancellation (VVC) control strategy. Just recently, Jeong et al.…”

Section: Introductionmentioning

confidence: 99%

Elasto-acoustic response damping performance of a smart cavity-coupled electro-rheological fluid sandwich panel

Hasheminejad

Fadavi-Ardakani

2017

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

The transient vibroacoustic response mitigation of a rectangular sandwich panel with an adaptive electro-rheological fluid core layer, and backed by a hard-walled reverberant rectangular parallelepiped acoustic enclosure, is investigated. The problem is analyzed in a multidisciplinary framework that involves the thin sandwich electro-rheological fluid-based plate model, the 3D wave equation for the acoustic enclosure domain, the first-order Kelvin–Voigt viscoelastic model for the electro-rheological fluid core material, the pertinent structure–fluid compatibility relation, and the inherently robust sliding mode control strategy. The generalized Fourier expansion method is utilized to set up the fully coupled system equations in the state–space domain, and the fourth-order Runge-Kutta time marching technique is then utilized to compute both uncontrolled and controlled coupled system responses in three basic external loading configurations. It is found that increasing the cavity depth has a substantial restraining effect on the overall sound pressure response levels, while the electro-rheological fluid-panel displacement response amplitudes experience only moderate reductions. Also, a purely passive electro-rheological fluid-based system is observed not to be very effective for vibroacoustic response suppression of the cavity-coupled structural system, while the overall success of the applied sliding mode control methodology in reasonable reduction of both panel displacement and sound pressure time response amplitudes is demonstrated. Furthermore, the control system authority with regard to the acoustic cavity pressure (panel displacement) is found to moderately (slightly) decrease as the cavity depth increases. Limiting cases are considered and accuracy of the suggested analytical model is checked against the output of an FEM package as well as with the accessible literature results. Moreover, the main components of a prospective experimental platform for verifying the performance of proposed vibroacoustic control system are briefly described.

show abstract

Sound transmission loss of composite and sandwich panels in thermal environment

Zhao

et al. 2018

Composites Part B: Engineering

View full text Add to dashboard Cite

Active attenuation of sound transmission through a soft-core sandwich panel into an acoustic enclosure using volume velocity cancellation

Cited by 10 publications

References 18 publications

Active structural acoustic control of transmitted sound through a double panel partition by weighted sum of spatial gradients

Active structural acoustic control of transmitted sound through a double panel partition by weighted sum of spatial gradients

Elasto-acoustic response damping performance of a smart cavity-coupled electro-rheological fluid sandwich panel

Sound transmission loss of composite and sandwich panels in thermal environment

Contact Info

Product

Resources

About