Plate-rod combined negative stiffness damper

By designing a plate-rod combined negative stiffness vibration damper, which employs a plate spring and connecting rod structure, the problems of stability and cost of existing negative stiffness vibration damping devices are solved. This achieves horizontal vibration control and efficient vibration reduction under multiple working conditions, and is suitable for multi-degree-of-freedom systems such as high-rise buildings.

CN117366164BActive Publication Date: 2026-05-08HARBIN INST OF TECH
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Patent Information

Application Number
CN202311487655.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-09
Publication Date
2026-05-08
Estimated Expiration
2043-11-09

AI Technical Summary

Technical Problem

Existing negative stiffness vibration damping devices have problems in terms of stability, cost, installation difficulty and maintenance complexity. They are especially rarely used in horizontal vibration control and seismic excitation, and their high processing difficulty and cost limit their widespread application.

Method used

Design a plate-rod combined negative stiffness vibration damper, which adopts a combination structure of plate spring and connecting rod, connected by a smooth hinge, to achieve horizontal vibration control. It has a simple structure, light weight, low price, reliable operation, and adjustable negative stiffness characteristics, making it suitable for various working conditions.

Benefits of technology

It improves the structural stability and horizontal vibration control capability of the vibration damper, reduces maintenance and management costs, is suitable for multi-degree-of-freedom systems such as high-rise buildings, and has a wider vibration isolation frequency band and better vibration reduction effect.

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Abstract

The application discloses a plate-rod combined negative stiffness damper, which comprises a damping object, a linear supporting spring, a linear damping, a sliding groove, a plate spring, a connecting rod, a rigid cantilever and a smooth hinge; one end of the damping object is elastically connected with a side wall through the linear supporting spring and the linear damping, and the other end is fixedly connected with the rigid cantilever; the damping object is horizontally slid in the horizontally placed sliding groove through a pulley; two end surfaces of the plate spring are fixed with the side wall, and the center position of the plate spring is an arch height position; the plate spring is symmetrically distributed in the horizontal direction about the rigid cantilever in a relative arch height position mode; the left and right sides of the center position of the plate spring are symmetrically provided with the horizontal connecting rods; one end of the connecting rod is smoothly hinged with the plate spring, and the other end is smoothly hinged with the rigid cantilever. The damper can control the vibration in the horizontal direction, and has the advantages of simple structure, light mass, easy manufacturing, low price, reliable work and strong bearing capacity.
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