Abstract A novel multi-layer structure with functions for dynamic stabilization and vibration isolation, bio-inspired by the role of an avian neck, is proposed in this paper. Inspired by the fact that an avian neck can stabilize the head from body flapping, we expect that the proposed structure can achieve dynamic stabilization effectiveness under external excitation with a low frequency, large amplitude, and displacement mutations. First, for different configurations of the bio-inspired structure, the key characteristics, such as the elastic deformation energy, restoring force and equivalent dynamic properties are determined by mechanical modeling. It discovers that the proposed bio-inspired structure could achieve the designed loading capacity and dynamic zero stiffness simultaneously. Then according to the analysis of the dynamic behaviors under impact excitation and harmonic excitation by the perturbation method, the optimum criteria for the structural configuration and parameters are carried out. Thus, the effective isolation band begins at zero frequency, and the dynamic behavior could be quickly stabilized. Finally, the constructed multi-layer structure could achieve the stabilization functions of the avian neck. For different strengths of gusts, the amplitude of the top layer is less than a fifth of the excitation from the body. Due to the multiple functions in dynamic stabilization and control, the proposed structure can solve the bottleneck techniques in nonlinear isolation structural design, and it has remarkable potential applications in the fields of mechanical arms, sensors in satellites, etc.

中文翻译：

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一种受鸟类颈部作用启发的新型动态稳定和隔振结构

摘要 本文受鸟类颈部作用的生物启发，提出了一种具有动态稳定和隔振功能的新型多层结构。受鸟类颈部可以稳定头部免于身体拍动这一事实的启发，我们期望所提出的结构能够在低频、大振幅和位移突变的外部激励下实现动态稳定效果。首先，对于仿生结构的不同配置，其关键特性，如弹性变形能、恢复力和等效动力学特性是通过机械建模确定的。它发现所提出的仿生结构可以同时实现设计的承载能力和动态零刚度。然后根据微扰法对冲击激励和谐波激励下的动力特性进行分析，确定了结构配置和参数的最优准则。因此，有效隔离带从零频率开始，并且动态行为可以快速稳定。最后，构建的多层结构可以实现鸟类颈部的稳定功能。对于不同强度的阵风，顶层的振幅小于身体激发的五分之一。由于该结构在动态稳定和控制方面具有多种功能，可以解决非线性隔离结构设计中的瓶颈技术，在机械臂、卫星传感器等领域具有显着的潜在应用。