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首页> 外文期刊>Smart Materials & Structures >Fluidic origami cellular structure with asymmetric quasi-zero stiffness for low-frequency vibration isolation
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Fluidic origami cellular structure with asymmetric quasi-zero stiffness for low-frequency vibration isolation

机译：流体折纸蜂窝结构具有不对称的准零刚度，用于低频振动隔离

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摘要

This study investigates a unique asymmetric quasi-zero stiffness (QZS) property from the pressurized fluidic origami cellular structure, and examines the feasibility and efficiency of using this nonlinear property for low-frequency vibration isolation. This QZS property of fluidic origami stems from the nonlinear geometric relationships between folding and internal volume change, and it can be programmed by tailoring the constituent Miura-Ori crease design. Different fluidic origami cellular structure designs are introduced and examined to obtain a guideline for achieving QZS property. A proof-of-concept prototype is fabricated to experimentally validate the feasibility of acquiring QZS. Moreover, a comprehensive dynamic analysis is conducted based on numerical simulation and harmonic balance method approximation. The results suggest that the QZS property of fluidic origami can successfully isolate base excitation at low frequencies. In particular, this study carefully examines the effects of an inherent asymmetry in the force-displacement curve of pressurized fluidic origami. It is found that such asymmetry could significantly increase the transmissibility index with certain combinations of excitation amplitude and frequency, and it could also induce a drift response. Outcome of this research can lay the foundation for new origami-inspired multi-functional metamaterials and meta-structures with embedded dynamic functionalities. Moreover, the investigations into the asymmetry in force-displacement relationship provide valuable insights for many other QZS structures with similar properties.
机译：本研究研究了来自加压流体折纸细胞结构的独特的非对称准零刚度（QZS）性能，并检查使用该非线性性能进行低频振动隔离的可行性和效率。这种流体折纸的QZS属性源于折叠和内部体积变化之间的非线性几何关系，并且可以通过定制组成的Miura-Ori折痕设计来编程。介绍和检查不同流体折纸蜂窝结构设计，以获得实现QZS性能的指导。验证原型是制造的，以实验验证获取QZ的可行性。此外，基于数值模拟和谐波平衡方法近似进行了全面的动态分析。结果表明，流体折纸的QZS性能可以在低频下成功分离基础激发。特别是，本研究仔细检查了加压流体折纸的力 - 位移曲线中固有不对称的效果。发现这种不对称可以显着增加具有某些激发幅度和频率的组合的传输指标，并且它也可以引起漂移响应。该研究的结果可以为具有嵌入式动态功能的新折纸启发的多功能超材料和元结构奠定基础。此外，对力 - 位移关系中的不对称性的调查为许多具有相似性质的许多其他QZ结构提供了有价值的见解。

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