仿猫类落地姿态的准零刚度隔振器

对设备加装隔振装置是保证其高效工作的重要方法之一.本文从仿生学的角度，根据猫科动物落地时优秀的抗冲击能力，通过观察其落地动作姿态，利用非线性补偿原理，以空气弹簧作为正刚度结构，设计出一种具有非对称刚度特性的高静低动刚度隔振器.以其为研究对象，建立了动力学模型，利用特定的方法对非对称刚度系统进行分析求解，并与数值结果和有限元仿真结果进行对比.结果表明，在较低阻尼以及较高激励幅值下，还会出现倍周期响应甚至混沌响应.同时，通过将本文设计的隔振结构和单一空气弹簧的隔振性能对比，可以得到隔振效果明显优于单一空气弹簧的结论，从而验证了所设计隔振结构的有效性和可行性.

Quasi-Zero-Stiffness Vibration Isolator Inspired by the Cat Landing Attitude

Installing vibration isolation devices on equipment is one of the important methods to ensure its stable use. From the perspective of bionics, according to the excellent impact resistance of cats when landing, this paper designs a high static and low dynamic stiffness isolator with asymmetric stiffness characteristics by observing their landing action posture and using the principle of nonlinear compensation and using the air spring as the positive stiffness structure. Taking it as the research object, a dynamic model is established, and a specific method is used to analyze and solve the asymmetric stiffness system, and compare it with the numerical results and finite element simulation results. The results show that at lower damping and higher excitation amplitudes, there is also a period response or even a chaotic response. At the same time, by comparing the vibration isolation structure and the vibration isolation performance of a single air spring designed in this paper, the conclusion that the vibration isolation effect is significantly better than that of a single air spring can be obtained, which verifies the effectiveness and feasibility of the designed vibration isolation structure.