自参数摆式吸收收割机的大振幅振动及非线性动力学特性

IF 2.8 3区 工程技术 Q2 MECHANICS
Ao Zhang , Zhanxiang Gao , He Li , Ping Han , Zhenting Song , Wenda Yu
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引用次数: 0

摘要

研究了大摆角条件下摆式吸振-收割机系统的非线性动力学特性,解决了吸振和能量收集的双重目标。建立了吸收割机系统的动力学模型,用数值方法分析了系统的分岔特性和混沌运动。结果表明,该系统在吸收带宽内表现出三种不同的运动模式:稳定周期运动、准周期运动和混沌运动。实验验证了不同的运动模式,评估了系统的吸振效率和能量收集性能。此外,还评估了关键参数对系统动态响应的影响。结果表明,当混沌运动发生在吸收带宽内时,左稳定区会减小主系统的振动幅值,而右稳定区会增大主系统的振动幅值。同时,在一定的参数下会出现多个混沌运动区域,这有利于能量的收集,但不利于振动的吸收。在两个混沌区之间存在一个稳定的全圆周旋转运动区,该区域有利于振动吸收和能量收集。吸收-收割机系统的非线性动态特性表现出显著的参数依赖性,使实际调整能够满足特定的应用要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large amplitude vibrations and nonlinear dynamics characteristics of an autoparametric pendulum absorber-harvester
This study investigates the nonlinear dynamics of a pendulum absorber-harvester system under large swing angle conditions, addressing the dual objectives of vibration absorption and energy harvesting. The dynamic model of the absorber-harvester system is established and the bifurcation characteristics and chaotic motion is analyzed by a numerical method. The results indicate that the system could exhibit three distinct motion patterns within the absorption bandwidth: stable periodic motion, quasi-periodic motion, and chaotic motion. Experiment validation is conducted to verify the different motion patterns and assess the system's vibration absorption efficiency and energy harvesting performance. Furthermore, the impact of key parameters on system's dynamic response is evaluated. The findings reveal that when chaotic motion occurs within the absorption bandwidth, the left stable region can reduce the vibration amplitude of the main system, while the right stable region could increase the vibration amplitude of the main system. Also, multiple chaotic motion regions would occur under certain parameters, which could be beneficial for energy harvesting but not conducive to vibration absorption. A stable full-circle rotation motion region of the pendulum exists between two chaotic regions, and this region is beneficial for both vibration absorption and energy harvesting. The nonlinear dynamic characteristics of the absorber-harvester system exhibit significant parameter dependence, enabling practical adjustments to meet specific application requirements.
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来源期刊
CiteScore
5.50
自引率
9.40%
发文量
192
审稿时长
67 days
期刊介绍: The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.
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