Abstract A metastructure consisting of numerous unit cells with quasi-zero stiffness property has been designed and researched in this paper. The quasi-zero stiffness property is realized in each unit cell by combining snap-through behavior of a sinusoidal beam and bending dominated support of two semicircular arches. Mechanical behavior of the metastructure is derived theoretically based on the property of all the unit cell components. The unit cell and metastructure samples are designed and fabricated by the FDM additive manufacturing technology. Experiments and simulations are carried out on the samples to investigate static characteristics of the metastructure and verify the theoretical solution. Based on that, dynamic analysis of the metastructure under displacement control vibration is carried out to study the vibration isolation performance of the metastructure by theoretical and simulation methods. Results show that the presented metastructure can achieve good quasi-zero stiffness property by designing the unit cells properly. It exhibits excellent vibration isolation performance and has great potential to be used as continuous structures or materials in the vibration isolation for small-scale equipment which is difficult to be realized by installation of the spring mechanism.

中文翻译：

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具有准零动刚度隔振的元结构设计

摘要 本文设计并研究了一种由多个具有准零刚度特性的晶胞组成的元结构。通过将正弦梁的快速通过行为和两个半圆拱的弯曲主导支撑相结合，在每个晶胞中实现了准零刚度特性。元结构的机械行为是基于所有晶胞组件的特性从理论上推导出来的。晶胞和元结构样品采用 FDM 增材制造技术设计和制造。对样品进行了实验和模拟，以研究元结构的静态特性并验证理论解决方案。基于此，对位移控制振动下的基础结构进行动力学分析，通过理论和仿真方法研究基础结构的隔振性能。结果表明，通过正确设计晶胞，所提出的元结构可以实现良好的准零刚度特性。它表现出优异的隔振性能，在安装弹簧机构难以实现的小型设备隔振中作为连续结构或材料具有很大的潜力。