Hybrid Bragg-locally resonant bandgap behaviors of a new class of motional two-dimensional meta-structure

Liang, Feng; Chen, Yao; Kou, Haijiang; Qian, Yu

doi:10.1016/j.euromechsol.2022.104832

Cited by 34 publications

(2 citation statements)

References 52 publications

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“…However, these approaches have drawbacks, such as adding extra-large lumped mass to the primary structure, post modification to the geometry of the structure, and challenges of post installation, which can impact their functionality. To address these issues, a new approach based on integrating distributed periodic local resonators (LRs) to work as vibration absorbers, known as metastructures, has been proposed recently [17,18]. Metastructures are inspired by the traditional passive low degree-of-freedom (DOF) vibration absorber systems and recently emerged periodic phononic metamaterials [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

Chen,

Xu,

Zhao

2024

Smart Mater. Struct.

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This paper proposes an innovative dual-functional aeroelastic metastructure that effectively suppresses wind-induced structural vibrations under either pure aerodynamic galloping or concurrent galloping and base excitations, while simultaneously harnessing the vibratory energy to potentially allow for self-powered onboard low-power sensing applications. Two configurations are theoretically and experimentally analysed and compared, one consisting of simply regular locally resonating masses subjected to no external forces, while the other comprising locally resonating bluff bodies which experience additional aerodynamic galloping forces. Numerical investigation is conducted based on an established aero-electro-mechanically coupled model. Wind tunnel wind tunnel and base vibration experiments are carried out using a fabricated aeroelastic metastructure prototype to characterize the energy transfer mechanisms and validate the numerical results. The mutual effects of key system parameters, including the frequency ratio, mass ratio, load resistance and electromechanical coupling strength, on the dual-functional capabilities are examined, providing a comprehensive design guideline for efficiently enhancing the energy transfer and conversion. Experimentally, the galloping displacement of the primary structure is attenuated by 78% with a measured power output of 2.63mW from a single auxiliary oscillator at a wind speed of 8m/s. This research opens new possibilities for designing novel metastructures in practical scenarios where both wind-induced vibration suppression and energy harvesting are crucial.

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Section: Introductionmentioning

confidence: 99%

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

Chen,

Xu,

Zhao

2024

Smart Mater. Struct.

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“…Malara et al 10 considered the fractional derivative element and researched the nonlinear vibration of rods with variable cross-sections. Liang et al 11 – 13 developed the spectral element method, the transfer matrix method, and other robust approaches to systematically study complex vibrations in fluid-conveying pipes, contributing to the advancement of vibration prediction methods for elastic structures. With the increasing demand for nonlinear vibration control, scholars have attempted to utilize nonlinear principles to design various nonlinear supports 14 – 17 Engineers then installed these supports into elastic structures to assess the feasibility of controlling vibrations using nonlinear supports.…”

Section: Introductionmentioning

confidence: 99%

A study of analyzing longitudinal dynamic behavior of a double-rod system with longitudinal nonlinear supports

Zhao,

Cui

2024

Sci Rep

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In engineering, shafting systems are typically subjected to longitudinal vibration excitations, which may result in unwanted vibration. To study the control of longitudinal vibration in shafting systems, they can be simplified to rod structures. Currently, engineers have attempted to apply the nonlinear principle to design nonlinear supports to control the vibration of flexible structures. However, the flexible structures referenced in the literature are usually composed of a single component, which limits the application of nonlinear supports to more complex structures. To explore the potential application of nonlinear supports in marine engineering, this work introduces a longitudinal vibration prediction model for a double-rod system equipped with longitudinal nonlinear supports. The generalized Hamilton principle is used to derive the governing equations for the double-rod system with longitudinal nonlinear supports. The longitudinal vibration responses of the double-rod system are numerically solved using the Galerkin truncation method. The numerical results confirm that a 1-term truncation number guarantees the stability of the longitudinal vibration prediction model. Under certain conditions, the longitudinal vibration responses are significantly affected by longitudinal nonlinear supports. It is recommended to install longitudinal nonlinear supports on both Rod 1 and Rod 2 simultaneously to suppress vibration in the first two main resonance orders. With reasonable excitations, the vibration state and magnitudes of the double-rod system can be effectively controlled by adjusting the longitudinal nonlinear supports. Complex longitudinal vibration responses are more readily induced by altering the parameters of the longitudinal nonlinear support installed on Rod 1. Choosing appropriate parameters for the nonlinear supports on Rod 1 and Rod 2 positively contributes to the reduction of vibration in the double-rod system.

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Flexural vibration control of functionally graded poroelastic pipes via periodic piezoelectric design

Ding,

Chen,

Liang

et al. 2024

Acta Mech

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Hybrid Bragg-locally resonant bandgap behaviors of a new class of motional two-dimensional meta-structure

Cited by 34 publications

References 52 publications

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

A study of analyzing longitudinal dynamic behavior of a double-rod system with longitudinal nonlinear supports

Flexural vibration control of functionally graded poroelastic pipes via periodic piezoelectric design

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