Quasi-zero stiffness elastic joint and construction method and construction device thereof

Abstract

The invention discloses a quasi-zero-stiffness elastic joint and a construction method and a construction device thereof. The quasi-zero-stiffness elastic joint comprises an outer sleeve, a positive stiffness element and a negative stiffness element. The outer sleeve is arranged on the positive stiffness element in a sleeving manner; the negative stiffness element is arranged in the positive stiffness element, and when vibration occurs, the negative stiffness generated by the negative stiffness element counteracts the positive stiffness generated by the positive stiffness element. The quasi-zero-stiffness elastic joint has the advantages of being high in static rigidity, low in dynamic rigidity, wide in vibration reduction frequency domain, good in low-frequency vibration isolation characteristic, capable of effectively reducing vibration transmitted from a rail to a frame-work, between the framework and a bogie and between the bogie and a vehicle body, capable of effectively reducing the vibration of the vehicle body and capable of improving passenger com-fort and running stability; meanwhile, the quasi-zero-stiffness elastic joint is compact in structure, adopts a built-in parallel installation mode, does not change the interface form and size of the elastic joint, and can realize vertical, axial, deflection and torsion movement along with the elastic joint.

Description

technical field [0001] The invention belongs to the field of rail transit vibration reduction, and in particular relates to a quasi-zero-stiffness elastic node, a construction method and a construction device thereof. Background technique [0002] With the improvement of the running speed of rail trains and the development of light weight, the vibration of the car body gradually increases. At present, the shock absorbers in the form of elastic nodes are mostly used in rail vehicles. The flexibility of the shock absorbers is large, which leads to serious low-frequency vibration problems during the running of the vehicle, which affects the stability and comfort of the vehicle. From the analysis of vibration isolation theory, it can be concluded that the traditional linear stiffness vibration isolation technology can only be used when the excitation frequency is greater than The vibration isolation effect is only available when the natural frequency of the system is twice tha...

AI Technical Summary

Problems solved by technology

[0004] 1. The elastic nodes of purely mechanical structures only realize negative stiffness characteristics in a single direction;

[0005] 2. The adaptability and flexibility are weak, the scheme structure is complex, and there are too many components, which is not conducive to project promotion

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