Three-way nonlinear hybrid energy dissipation self-resetting damper

Abstract

The invention relates to a three-way nonlinear hybrid energy dissipation self-resetting damper. The three-way nonlinear hybrid energy dissipation self-resetting damper comprises a damper cavity body,a particle swarm, a buffer material, viscous liquid, variable stiffness springs and a fixed structure. The damper cavity body is composed of an inner cuboidal cavity and an outer cuboidal cavity. Theinner portion of the inner cuboidal cavity is paved with a layer of particle swarm, and the buffer material is pasted on the inner wall of the inner cuboidal cavity. The outer wall of the inner cuboidal cavity and the inner wall of the outer cuboidal cavity are connected by the variable stiffness springs, and the viscous liquid is arranged between the inner cuboidal cavity and the outer cuboidal cavity in a filling mode. The four variable stiffness springs are uniformly arranged at the bottom of the outer cuboidal cavity and are connected with a basic structure. The bottom of the outer cuboidal cavity is connected with the fixed structure in the horizontal direction through the two variable stiffness springs which are arranged in an orthogonal mode. By reasonably setting the stiffness of the nonlinear variable stiffness springs made from shape memory alloys, the damper can provide different stiffness in the horizontal, orthogonal and vertical directions to tune the frequency of the structure under the action of wind / earthquakes, and the vibration energy of the structure is dissipated through viscous energy-dissipation, spring energy-dissipation, friction and collision of the particle swarm and the like.

Description

technical field [0001] The invention relates to a three-way nonlinear hybrid energy-consuming self-resetting damper, which belongs to the field of vibration control of civil structures (including high-rise buildings, towering structures and bridge structures, etc.). Background technique [0002] In recent years, the tuned mass damper (TMD) has received extensive attention due to its characteristics of small changes to the original structure, simple construction, and remarkable vibration reduction effect, and has been widely used in civil engineering structures at home and abroad. However, the tuned mass damper can only have a certain vibration reduction effect in a specific frequency range, and the vibration reduction effect for frequencies deviated from this frequency band is not good, and it has the disadvantage that the additional energy-dissipating damper is expensive. At the same time, the additional mass block is connected to the main structure by means of suspension o...

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Problems solved by technology

[0004] In order to solve the problem that the traditional tuned mass damper has a narrow damping frequency band and the cost of setting an energy-dissipating damper is expensive, and the problem that the traditional tuned mass damper can only provide a specific tuning frequency in the horizontal direction, the purpose of the present invention is to propose A three-way nonlinear hybrid energy-dissipating self-resetting damper. By setting a cavity on the mass block, the device relies on the inside of the particle group and the collision with the damper cavity, the viscous liquid between the inner and outer cavities and the Shape memory alloy springs provide damping, which can significantly reduce the cost of the damper

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