Variable stiffness self-resetting damper based on shape memory alloy material

A memory alloy, self-resetting technology, applied in the field of dampers and variable-stiffness self-resetting dampers, can solve problems such as limited use scenarios, and achieve the effects of increased axial force amplification factor, easy installation and maintenance, and high material utilization efficiency.

CN114645582APending Publication Date: 2022-06-21BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-06-21

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Abstract

The invention relates to a variable stiffness self-resetting damper based on a shape memory alloy material, and belongs to the field of structural vibration and control. Comprising a left connecting plate, a slotted cuboid, a limiting sliding block, a transmission rod a, an SMA tow, a right connecting rod and various blocking rods. According to the variable-stiffness self-resetting damper, the SMA wire bundles are in a stretched state no matter the variable-stiffness self-resetting damper is pulled or pressed, and the material utilization efficiency is high; the left end and the right end of the SMA tow are in an isosceles triangle deformation state due to constraint of the stop lever, the axial force amplification coefficient of the damper is an included angle between the direct stress section of the SMA tow and the axial direction of the damper, the included angle is reduced along with increase of axial deformation of the damper, the axial force amplification coefficient of the damper is increased, and therefore the variable stiffness effect of the self-resetting damper is achieved. The rigidity of the self-resetting damper can be flexibly adjusted by adjusting the distance between the two stop levers in the axial vertical direction of the damper; the damper is of an assembly type structure, is easy to install and maintain and has wide application prospects.
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Description

technical field

[0001] The invention relates to a damper, in particular to a variable stiffness self-resetting damper based on a shape memory alloy material, and belongs to the technical field of structural vibration and control. Background technique

[0002] Shape memory alloy (SMA) is a new type of functional material, which has been widely used in the field of structural vibration control due to its good energy dissipation and superelastic properties. Shape memory alloys and other functional materials can achieve different seismic effects through different construction methods. For example, by combining shape memory alloys with disc springs, springs and other materials, a damper with stronger self-resetting ability can be manufactured; The combination of energy-consuming materials such as friction materials and metal supports can produce dampers with stronger energy-dissipation capabilities. In addition, the special mechanical structure of the shape memory alloy can brea...

Examples

Embodiment Construction

[0031] In order to express the functions and features of the present invention more clearly, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the examples described below.

[0032] figure 1 , figure 2 and image 3 is the construction method of the variable stiffness self-resetting damper based on shape memory alloy material, Figure 4 It is an embodiment of a variable stiffness self-resetting damper based on shape memory alloy materials.

[0033] like Figure 1-4 As shown in the figure, a variable stiffness self-resetting damper based on shape memory alloy material in this embodiment, the variable stiffness self-resetting damper includes a left connecting plate 1, a slotted cuboid 2, a limit slider 3, a gear lever a4, a gear Rod b5, limit lever 6, transmission lever a7, SMA wire bundle 8, gear lever c9, gear lever d10 and right connecting ...