Traditional single-function lightweight structure excels in a specific application scenario such as energy absorption, but is difficult to meet the multi-function requirements of the complex working environment for the high-end equipments. In this paper, a novel quasi-zero stiffness (QZS) metamaterial is proposed based on the topological design combining the positive and negative stiffness units, to achieve the multifunction integration of vibration attenuation and energy absorption. The quasi-static compression tests and shaker vibration isolation tests were carried out on the specimens prepared by stereolithography (SLA) and selective laser sintering (SLS) additive manufacturing techniques. The effects of structural parameters and base materials on the mechanical and vibration isolation properties of QZS metamaterials were systematically investigated. The proposed QZS metamaterial can realize the ultra-wideband vibration damping effect with the isolation band as wide as 5980 Hz, and the overall deformation of the structure can be adjusted by both mechanical load and temperature programming. In addition, the proposed QZS metamaterials have excellent repeatable energy absorption properties, maintaining 80 % load carrying capacity and 92 % specific energy absorption (SEA) after six loading cycles. Therefore, the QZS metamaterial can simultaneously achieve high load-bearing capacity and excellent vibration isolation performance, providing a new pathway to build multifunctional integrated lightweight structures.

中文翻译：

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具有超宽带隔振性能的准零刚度超材料设计

传统的单功能轻量化结构在能量吸收等特定应用场景中表现出色，但难以满足高端设备复杂工作环境的多功能要求。本文基于正负刚度单元相结合的拓扑设计，提出了一种新型准零刚度（QZS）超材料，实现了减振和吸能的多功能集成。对通过立体光固化成型 （SLA） 和选择性激光烧结 （SLS） 增材制造技术制备的试样进行了准静态压缩测试和振动台振动隔离测试。系统研究了结构参数和基材对 QZS 超材料的机械和振动隔离性能的影响。所提出的 QZS 超材料可以实现隔振带宽达 5980 Hz 的超宽带减振效果，并且结构的整体变形可以通过机械载荷和温度编程来调节。此外，所提出的 QZS 超材料具有出色的可重复能量吸收性能，在 6 次加载循环后仍保持 80% 的承载能力和 92% 的比能量吸收 （SEA）。因此，QZS 超材料可以同时实现高承载能力和优异的隔振性能，为构建多功能集成轻量化结构提供了新的途径。