Dynamic Mechanical Properties and Weight Optimization of Vibrated Ground Recycled Rubber

Chettah, Ameur; Ichchou, Mohamed; Bareille, Olivier; Chedly, S.; Onteniente, Jean Paul

doi:10.1177/1077546308097273

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…These results are consistent with the nonlinear performance of other types of particle dampers described in the open literature [30,31]. Chettah et al have observed an equivalent loss factor higher than 0.4 in recycled polyurethane particles used for dampening flexural vibrations in beams [11]. Values of the specific damping capacity close to 0.45 have also been identified in DEM simulations representative of SDOF systems with acrylic resin particles [7,32].…”

Section: Dynamics Characteristics Of the Anti-tetrachiral Honeycomb W...supporting

confidence: 85%

A nonlinear auxetic structural vibration damper with metal rubber particles

Ma¹,

Scarpa²,

Zhang³

et al. 2013

Smart Mater. Struct.

136

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The work describes the mechanical performance of a metal rubber particles (MRP) damper design based on an auxetic (negative Poisson's ratio) cellular configuration. The auxetic damper configuration is constituted by an anti-tetrachiral honeycomb, where the cylinders are filled with the MRP material. The MRP samples have been subjected to quasi-static loading to measure the stiffness and loss factor from the static hysteresis curve. A parametric experimental analysis has been carried out to investigate the effect of relative density and filling percentage on the static performance of the MRP, and to identify design guidelines for best use of MRP devices. An experimental assessment of the integrated auxetic-MRP damper concept has been provided through static and dynamic force response techniques.

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Section: Dynamics Characteristics Of the Anti-tetrachiral Honeycomb W...supporting

confidence: 85%

A nonlinear auxetic structural vibration damper with metal rubber particles

Ma¹,

Scarpa²,

Zhang³

et al. 2013

Smart Mater. Struct.

136

View full text Add to dashboard Cite

show abstract

“…In fact, many practical control problems involve the systems whose dynamics depend on some measurable exogenous parameters. For example, many vibration control systems are required to function across a variety of different temperatures, however, the variation of ambient temperature can change the structural natural frequencies and piezoelectric stress and permittivity coefficients, thus the applied control effort has to consider such temperature dependence (Hegewald and Inman, 2001;Chettah et al, 2009;Gupta et al, 2012). This kind of control problem is readily to be handled with the proposed quantitative robust LPV H ∞ control method which considers the time-varying temperature as the scheduled variable.…”

Section: Quantitative Robustness Analysis Of the Closed-loop Systemmentioning

confidence: 99%

Quantitative robust linear parameter varying H_∞ vibration control of flexible structures for saving the control energy

Zhang

Scorletti

Ichchou

et al. 2014

Journal of Intelligent Material Systems and Structures

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Quantitative robust linear parameter varying H∞ vibration control of flexible structures for saving the control energy. Abstract In this article, a general and systematical quantitative robust linear parameter varying (LPV) control method is proposed for active vibration control of LPV flexible structures such that a complete set of control objectives can be considered, especially, the reduction of necessarily required control energy. To achieve this goal, phase and gain control policies are employed in LPV H ∞ control designs for suitable selection of weighting functions. The designed parameter-dependent H ∞ controller allows us to explicitly consider the time-varying parameters of the dynamical models for saving the control energy and achieving other control objectives such as the specification of vibration reduction and qualitative robustness properties to both parametric and dynamic uncertainties. Then, various reliable robustness analyses are conducted to quantitatively verify the robustness properties of the closedloop system. The design processes and the effectiveness of the proposed control method are illustrated by active vibration control of a non-collocated piezoelectric cantilever beam excited by an external position-varying forcewhich is the disturbance to be rejected. This plant has typical positiondependent dynamics and is modeled as an LPV system whose time-varying parameter is the actual position of the disturbance. The numerical simulations demonstrate that, compared to the classical H ∞ control and the acceleration feedback control, the proposed control method allows to compute a quantitatively robust parameter (force position) dependent controller whose benefit is to require less control energy and smaller control input, while satisfying the same control objectives in the frequency domain. KeywordsLPV H ∞ control, phase and gain control policies, saving the control energy, parametric and dynamic uncertainties Problem statementSince lightweight components are widely used in practical structures for miniaturization and efficiency, these structures become more flexible and more susceptible to vibrations, which may cause significant noises, harmful

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“…Later, Jones (1974) stressed the frequency–temperature dependence by employing the same methodology reported in his previous paper (Jones, 1972) and applying the frequency–temperature equivalence principle to draw the master curves. More recently, Chettah et al. (2009) presented a method to measure the mechanical properties of recycled granular rubber by also applying the frequency–temperature equivalence.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of a viscoelastic vibration neutralizer for rotating systems: Flexural control by slope degree of freedom

Voltolini¹,

Kluthcovsky

Filho³

et al. 2018

Journal of Vibration and Control

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Rotating machines have become increasingly powerful and rapid over time, often working now close to, or even above, their critical speeds. When, as a result, resonance or dynamic instability occurs, it can cause high vibration levels in these machines, particularly when rolling bearings are used. Vibration control of rotating systems can be made by viscoelastic dynamic vibration neutralizers (VDVNs), which are relatively cheap passive devices with a wide range of applications. For the control of flexural vibration in dynamic rotors, a translational VDVN is usually employed. It should be attached to the rotor by means of a special support, commonly between bearings, where the amplitude of the vibration mode of concern is high. The particular point where this type of device is attached depends on the mode to be controlled and in machines with reduced internal space, it cannot be placed in a suitable position. Therefore, this paper introduces a new type of VDVN, the angular VDVN, and proposes a methodology for the optimal design of a set of these devices for shaft slope degree of freedom control. This control aims at indirectly reducing flexural vibration. According to this approach, the control device can be installed close to the bearing where the slope degree of freedom presents its highest value at any critical speed. The conceptual design of the angular VDVN is presented to illustrate the proposed methodology, and a numerical example is given to demonstrate the influence of the angular VDVN geometry on the response. The corresponding results are fully discussed.

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Dynamic Mechanical Properties and Weight Optimization of Vibrated Ground Recycled Rubber

Cited by 6 publications

References 28 publications

A nonlinear auxetic structural vibration damper with metal rubber particles

A nonlinear auxetic structural vibration damper with metal rubber particles

Quantitative robust linear parameter varying H_∞ vibration control of flexible structures for saving the control energy

Optimal design of a viscoelastic vibration neutralizer for rotating systems: Flexural control by slope degree of freedom

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