Nonlinear vibration of a loaded string in energy harvesting

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-09-18 DOI:10.1088/1361-665x/ad79cf

Tao Liu, Chaoyang Zhao, Yaowen Yang and Weifeng Yuan

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引用次数: 0

Abstract

Designing wideband energy harvesters using beam structures typically involves complexities, particularly in low-frequency and low-energy environments where the limitations of beam structures become more evident. To address these challenges, this study proposed a strategy for energy harvesting using a loaded-string system and established a theoretical model to investigate its performance. A parametric study was conducted for the string system, examining the effects of initial tension, mass location, material stiffness and excitation amplitude. The accuracy of the proposed model was verified through experimental validation. Both theoretical and experimental analyses observed a frequency shifting phenomenon, demonstrating the wideband characteristics of the system. Furthermore, the proposed string structure allows for convenient parameter adjustments, enabling the tuning of its natural frequency and operating bandwidth to meet more stringent practical requirements. The string system provides a new direction for designing energy harvesters to harness low-frequency energy from the ambient environment.

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能量采集中加载弦的非线性振动

利用波束结构设计宽带能量收集器通常涉及复杂的问题，特别是在低频和低能量环境中，波束结构的局限性更加明显。为了应对这些挑战，本研究提出了一种利用加载弦系统进行能量收集的策略，并建立了一个理论模型来研究其性能。针对弦系统进行了参数研究，考察了初始张力、质量位置、材料刚度和激励振幅的影响。实验验证了所建模型的准确性。理论和实验分析都观察到了频率偏移现象，证明了系统的宽带特性。此外，所提出的弦结构可以方便地调整参数，从而调整其固有频率和工作带宽，以满足更严格的实际要求。该弦系统为设计能量收集器提供了一个新的方向，以利用环境中的低频能量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.