In this paper, an origami-inspired vibration isolator is proposed and numerically investigated to achieve a quasi-zero-stiffness (QZS) property. A truss-spring based stack Miura-ori (TS-SMO) structure is introduced in the vibration isolation system to provide a desired stiffness for high-static-low-dynamic requirement. The proposed TS-SMO structure is different from the traditional origami structures which include rigid facets and deformable creases. It uses coil spring sets to replace all the creases, to improve the physical realization in engineering applications. Nonlinear force response and the QZS feature can be achieved through the geometric nonlinearity and its unique Poisson’s ratio profile. The static force and stiffness characteristics of the developed TS-SMO structure are numerically discussed to meet specific feature requirements. Then a QZS vibration isolator is presented under specific parameter design. The force–displacement response and stiffness diagram are obtained to verify the static performance as an isolation system. Furthermore, the displacement transmissibility is derived through dynamic analysis by employing both harmonic balance method (HBM) and numerical simulations. The isolation performance under variable viscous damping is also discussed to examine the effects of the system damping.

在本文中，提出了一种受折纸启发的隔振器并进行了数值研究，以实现准零刚度 (QZS) 特性。在隔振系统中引入了基于桁架弹簧的堆栈 Miura-ori (TS-SMO) 结构，为高静态-低动态要求提供所需的刚度。所提出的 TS-SMO 结构不同于传统的折纸结构，包括刚性刻面和可变形折痕。它使用螺旋弹簧组代替所有折痕，以提高工程应用中的物理实现。非线性力响应和 QZS 特征可以通过几何非线性及其独特的泊松比分布来实现。对开发的 TS-SMO 结构的静力和刚度特性进行了数值讨论，以满足特定的特征要求。然后提出了一种在特定参数设计下的QZS隔振器。获得力-位移响应和刚度图以验证作为隔离系统的静态性能。此外，位移传递率是通过采用谐波平衡法（HBM）和数值模拟的动态分析得出的。还讨论了可变粘性阻尼下的隔离性能，以检查系统阻尼的影响。