A novel shock absorber with the preload structure and global negative stiffness is proposed for the shock isolation of sensitive systems. The novel shock absorber is composed of a linear spring and permanent magnet sets. The preload force and negative stiffness region are related to the attractive force between permanent magnet sets. The aim of this paper is to investigate the shock isolation performance of the novel shock absorber. Firstly, a static analysis of the novel shock absorber is carried out. Secondly, the motion stability of the NSA is analyzed by the Jacobian Matrix and the shock response is calculated numerically compared with the conventional preload structures. Finally, the shock test of the novel shock absorber is completed to verify the above results. It is found that the novel shock absorber could be advantageous in improving shock isolation in terms of relative displacement and absolute acceleration compared with conventional preload structures.

中文翻译：

---

具有预载和整体负刚度的新型减震器，可有效隔离震动

提出了一种具有预载结构和整体负刚度的新型减振器，用于敏感系统的隔振。新型减震器由线性弹簧和永磁体组成。预加载力和负刚度区域与永磁体组之间的吸引力有关。本文的目的是研究新型减震器的减震性能。首先，对新型减震器进行了静态分析。其次，通过雅可比矩阵分析了NSA的运动稳定性，并与传统的预载结构进行了数值计算。最后，完成了新型减震器的减震测试，以验证上述结果。