Generalization of the Concept of Bandwidth

Article Energy & Fuels

A low-frequency rotational electromagnetic energy harvester using a magnetic plucking mechanism

Gang Miao et al.

Summary: This study proposes a low-frequency rotational electromagnetic energy harvester using a nonlinear magnetic plucking configuration and resetting effect to improve energy harvesting performance.

APPLIED ENERGY (2022)

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Article Engineering, Mechanical

Nonlinear targeted energy transfer: state of the art and new perspectives

Alexander F. Vakakis et al.

Summary: This paper provides a brief overview of the current progress in the field of nonlinear targeted energy transfer (TET) and discusses some future directions for research. The authors introduce four emerging research areas, including intermodal targeted energy transfer, implementation of TET in nonlinear acoustic metamaterials, the breakdown of classical reciprocity in elastodynamics in the context of TET, and the impact of TET on the bandwidth of general classes of nonlinear resonators. The aim of the authors is to outline the main ideas, summarize recent developments, suggest possible directions for future work, and encourage further research in both the discussed topics and other TET-related areas.

NONLINEAR DYNAMICS (2022)

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Article Engineering, Mechanical

Modal energy exchanges in an impulsively loaded beam with a geometrically nonlinear boundary condition: computation and experiment

Alireza Mojahed et al.

Summary: The study investigates the effect of a geometrically nonlinear boundary condition on the redistribution of vibration energy in a cantilever beam, using a combination of experimental and computational methods to analyze the impact of different inclination angles on modal energy redistribution.

NONLINEAR DYNAMICS (2021)

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Article Engineering, Mechanical

New inverse wavelet transform method with broad application in dynamics

Alireza Mojahed et al.

Summary: The proposed method based on inverse wavelet transform demonstrates effectiveness in extracting dominant harmonic components from measured signals and applies to various areas in engineering and applied sciences. It is suitable for both stationary and nonstationary measurements, accurately reconstructing the original signal and being applicable to system identification, modal analysis, and quantification of nonlinear energy in diverse dynamical systems.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Editorial Material Optics