An Electrorheological Fluid-Based Plate for Noise Reduction in a Cabin: Experimental Results

Choi, Seung–Bok; Seo, J.W.; Kim, J.H.; Kim, K.S.

doi:10.1006/jsvi.2000.3051

Cited by 24 publications

(15 citation statements)

References 6 publications

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“…Choi et al (2001) investigated the effect of ER sandwich plate on noise control. They proposed an acoustic cavity comprising five acrylic sheets and ER plate as the sixth face of the cavity.…”

Section: Applications Of Mr/er Sandwich Platesmentioning

confidence: 99%

Dynamic characteristics and control of magnetorheological/electrorheological sandwich structures: A state-of-the-art review

Eshaghi

Sedaghati

Rakheja

2016

Journal of Intelligent Material Systems and Structures

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During past four decades, applications of magnetorheological and electrorheological fluids in adaptive sandwich structures have been widely studied, primarily for the purpose of vibration control. The rapid response time of controllable magnetorheological/electrorheological fluids to an applied magnetic/electric field and reversible variations in their stiffness and damping properties have been the key motivations for adaptive structures applications. This article presents a comprehensive review of the reported studies on applications of magnetorheological/electrorheological fluids for realizing active and semi-active vibration suppression in sandwich structures. The review focuses on methods of characterizing the magnetorheological/electrorheological fluids in the pre-yield region, magnetic/electric field-dependent phenomenological models describing the storage and loss moduli of fluids, experimental and analytical methods developed for vibration analysis of sandwich structures with magnetorheological/electrorheological fluid treatments, analysis of structures with partial magnetorheological/electrorheological fluid treatments and optimal treatment locations, and developments in control strategies for vibration suppression of magnetorheological/electrorheological sandwich structures. The studies on dynamic responses of fully and partially treated magnetorheological/electrorheological-based sandwich beams, plates, shells, and panels are also discussed, including the mathematical modeling methods and associated assumptions, methods of solutions, and experimental methods.

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Section: Applications Of Mr/er Sandwich Platesmentioning

confidence: 99%

Dynamic characteristics and control of magnetorheological/electrorheological sandwich structures: A state-of-the-art review

Eshaghi

Sedaghati

Rakheja

2016

Journal of Intelligent Material Systems and Structures

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“…The formulated model is of both industrial and academic interests essentially owing to its basic value as a practical and very common problem in noise control engineering and structural acoustics. Also, the presented highly accurate space–time converged solutions can lead to development of reliable analytical/experimental tools for analysis and design of flexible boundary panels with optimal noise control characteristics for prospective technological applications, with many prospective technological applications [4,40,44–46]. Lastly, the presented modal-based theoretical solution can aid as a benchmark for assessment of rather restrictive asymptotic or numerical methods [34,35,37].…”

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

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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.

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“…[28][29][30][31][32] There are, however, comparatively fewer authors who have investigated the sound radiation and insulation characteristics of these structures. Among them, Choi, et al 33 formulated a fuzzy control logic on the basis of field-dependent sound pressure levels to experimentally investigate noise control of a rectangular closed cabin featuring one side of an ER fluid-based smart plate. Szary 34 examined the sound transmission loss for various kinds of electrorheological suspensions placed between two specially designed barriers under a variable alternative electric field den-sity in a frequency range from 100 Hz to 2 kHz.…”

Section: Introductionmentioning

confidence: 99%

“…It is also of practical value for noise control engineers involved in the development of reliable analytical and/or experimental tools for the design and analysis of ERF-based plates or panels with optimal acoustical characteristics. [33][34][35][36][37] Lastly, the presented analytical solution can serve as the benchmark for a comparison to solutions obtained by strictly numerical or asymptotic approaches.…”

Section: Introductionmentioning

confidence: 99%

http://iiav.org/ijav/content/volumes/21_2016_590031458046128/vol_1/851_fullpaper_1368281458214909.pdf

Hasheminejad¹,

Parvasi²

2016

IJAV

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A modal summation method based on far-field sound intensity is used to study the average radiation efficiency and the corresponding radiation power of a point-excited, simply-supported, rectangular sandwich plate containing a tunable electrorheological fluid (ERF) core, and set in an infinite rigid baffle. In addition, a classical analytical procedure based on the Rayleigh integral equation method is adopted to investigate the sound transmission characteristics (TL) of the adaptive plate insonified by plane pressure waves at an arbitrary angle of incidence, or excited by a perfectly diffuse sound field with a Gaussian directional distribution of energy. Numerical results reveal the imperative influence of an applied electric field strength (0-3.5 kV/mm) on controlling acoustic radiation from (or sound transmission through) the smart panel in a wide frequency range. In addition, an effort is made to find the optimal electric field which yields improved sound radiation and transmission characteristics for each excitation frequency. Limiting cases are considered and good agreements with the solutions available in the literature used in this study are obtained.

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An Electrorheological Fluid-Based Plate for Noise Reduction in a Cabin: Experimental Results

Cited by 24 publications

References 6 publications

Dynamic characteristics and control of magnetorheological/electrorheological sandwich structures: A state-of-the-art review

Dynamic characteristics and control of magnetorheological/electrorheological sandwich structures: A state-of-the-art review

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

http://iiav.org/ijav/content/volumes/21_2016_590031458046128/vol_1/851_fullpaper_1368281458214909.pdf

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