Optimization and modelling methodologies for electro-viscoelastic sandwich design for noise reduction

Vieira, Francisco S.; Araújo, Aurélio L.

doi:10.1016/j.compstruct.2019.111778

Cited by 10 publications

(1 citation statement)

References 25 publications

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“…More recently, the vibroacoustic problem has been addressed by Larbi et al in smart piezoelectric composite and sandwich plates [6,7,8,9,10] and also in double-wall sandwich panels [11,12]. The open literature regarding this subject of noise and vibration attenuation using both passive and active technologies is still quite scarce [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Optimal distribution of active piezoelectric elements for noise attenuation in sandwich panels

Madeira

Araújo

2020

International Journal of Smart and Nano Materials

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In this paper, a multiobjective optimization approach for obtaining the optimal distribution of surface-bonded piezoelectric sensors and actuators for noise attenuation in sandwich panels is presented. The noise attenuation is achieved by using negative velocity feedback control with co-located sensors and actuators. The control gains are also optimized in order to obtain the most efficient noise attenuation in a given frequency band. An in-house implementation of a viscoelastic soft core sandwich plate finite element, including surface-bonded piezoelectric sensors and actuators with active control capabilities, is used for obtaining the frequency response of the panels. The sound transmission capability of the panels is evaluated using the radiated sound power, along with the Rayleigh integral approach, which is suitable for lightly coupled structural/acoustic problems. The Direct MultiSearch (DMS) optimization algorithm is used to minimize the added weight due to the piezoelectric material, minimizing also the number of required controllers and maximizing the noise attenuation. The total length of the radiated sound power curve is shown to be an effective measure of noise attenuation in a given frequency band. Trade-off Pareto fronts and the obtained optimal configurations are presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Optimal distribution of active piezoelectric elements for noise attenuation in sandwich panels

Madeira

Araújo

2020

International Journal of Smart and Nano Materials

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An improved peridynamics topology optimization formulation for compliance minimization

Vieira,

Araújo

2024

Struct Multidisc Optim

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This work proposes an improved peridynamics density-based topology optimization framework for compliance minimization. One of the main advantages of using a peridynamics discretization relies in the fact that it provides a consistent regularization of classical continuum mechanics into a nonlocal continuum, thus containing an inherent length scale called the horizon. Furthermore, this reformulation allows for discontinuities and is highly suitable for treating fracture and crack propagation. Partial differential equations are rewritten as integrodifferential equations and its numerical implementation can be straightforwardly done using meshfree collocation, inheriting its advantages. In the optimization formulation, Solid Isotropic Material with Penalization (SIMP) is used as interpolation for the design variables. To improve the peridynamic formulation and to evaluate the objective function in a energetically consistent manner, surface correction is implemented. Moreover, a detailed sensitivity analysis reveals an analytical expression for the objective function derivatives, different from an expression commonly used in the literature, providing an important basis for gradient-based topology optimization with peridynamics. The proposed implementation is studied with two examples illustrating different characteristics of this framework. The analytical expression for the sensitivities is validated against a reference solution, providing an improvement over the referred expression in the literature. Also, the effect of using the surface correction is evidenced. An extensive analysis of the horizon size and sensitivity filter radius indicates that the current method is mesh-independent, i.e. a sensitivity filter is redundant since peridynamics intrinsically filters length scales with the horizon. Different optimization methods are also tested for uncracked and cracked structures, demonstrating the capabilities and robustness of the proposed framework.

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Optimal resistive shunted damping configurations for multi-modal noise reduction in sandwich panels

2022

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Optimization and modelling methodologies for electro-viscoelastic sandwich design for noise reduction

Cited by 10 publications

References 25 publications

Optimal distribution of active piezoelectric elements for noise attenuation in sandwich panels

Optimal distribution of active piezoelectric elements for noise attenuation in sandwich panels

An improved peridynamics topology optimization formulation for compliance minimization

Optimal resistive shunted damping configurations for multi-modal noise reduction in sandwich panels

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