Vibration isolation platform for large-amplitude-low-frequency excitation by parallel-stack-assembly design of Miura origamis

IF 2.8 3区 工程技术 Q2 MECHANICS International Journal of Non-Linear Mechanics Pub Date : 2024-07-06 DOI:10.1016/j.ijnonlinmec.2024.104831
Xiuting Sun , Qian Lv , Jiawei Qian , Jian Xu
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Abstract

To achieve an ultralow-frequency vibration isolation platform for simulation of space environment, suspension method is always utilized. However, the natural frequency of the suspension system is inversely proportional to the length of the suspension cable. In order to further reduce the dynamic stiffness, compress the suspension area, and achieve vibration isolation for wide-amplitude excitations, we propose parallel-stack-assembly (PSA) design principle for Origamis to construct absolute zero-stiffness for required intervals. The dynamic model for wide-range amplitude and deformation, design criteria for required low-frequency large-amplitude isolation effectiveness, and analysis for nonlinear vibration isolation property are given. Finally, the prototype is carried out to validate the theoretical analysis and design principle. The PSA design principle of Origamis creates the large-amplitude and ultralow-frequency isolation property, and, the study expands the applicability of isolators for low-frequency excitation with large amplitude for the systems in aviation, marine etc.

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利用三浦折纸的平行叠装设计实现大振幅低频激励的隔振平台
为实现用于模拟空间环境的超低频隔振平台,通常采用悬挂法。然而,悬挂系统的固有频率与悬挂电缆的长度成反比。为了进一步降低动态刚度,压缩悬挂面积,实现宽振幅激励下的隔振效果,我们提出了 Origamis 的平行叠加装配(PSA)设计原理,以构建所需区间的绝对零刚度。我们给出了宽振幅和变形的动态模型、所需低频大振幅隔振效果的设计标准以及非线性隔振性能分析。最后,通过原型验证了理论分析和设计原理。Origamis 的 PSA 设计原理创造了大振幅和超低频隔振特性,这项研究扩大了大振幅低频激励隔振器在航空、航海等系统中的适用范围。
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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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