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Composite material filled O-shaped metal plate damper and arrangement and parameter optimization method thereof

A technology of composite materials and dampers, which is applied in the field of construction, can solve the problems of poor global search ability, poor local search ability, and premature convergence of simulated annealing algorithms, so as to reduce the demand for lateral resistance, improve integrity, and improve shock absorption efficiency effect

Pending Publication Date: 2020-10-16
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The genetic algorithm has the disadvantages of poor local search ability, easy to fall into local optimal solution, and premature convergence.
The simulated annealing algorithm has poor global search ability and is easily affected by parameters

Method used

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  • Composite material filled O-shaped metal plate damper and arrangement and parameter optimization method thereof
  • Composite material filled O-shaped metal plate damper and arrangement and parameter optimization method thereof
  • Composite material filled O-shaped metal plate damper and arrangement and parameter optimization method thereof

Examples

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Effect test

Embodiment 1

[0092] In this example, the material of the O-shaped metal plate is a memory alloy that meets the conditions according to the design requirements; its thickness and strength should meet the requirements that the piston rod move stably in the damper when the earthquake is impacted, and the O-shaped metal plate maintains deformation elasticity; The radius should be slightly smaller than the inner wall of the first piston steel sleeve.

[0093] The contact surface between the piston rod and the O-shaped metal plate is fixed horizontally by 3-6 bolts. The total cross-sectional area of ​​the bolts is about 1 / 6 of the contact area, which ensures the integrity of the damper and does not damage the strength of the metal plate.

[0094] The inside and outside of the O-shaped metal plate are filled with foamed copper-polyurethane composite material to improve the working stability of the metal plate, and at the same time ensure the internal integrity of the damper when the metal plate is...

Embodiment 2

[0105] In parameter optimization, in this example, after determining the objective function, the method of optimizing multiple experimental factors with an orthogonal matrix is ​​used to carry out the design of experiments (DOE), determine the influence of the experimental factors on the objective function, and then determine the design variables, constraints condition. DOE can determine the optimal level combination under all factors and corresponding level conditions through a small number of experiments.

[0106] When determining the objective function, take the longitudinal displacement of the beam end of the main beam as the objective function through DOE, and select as many foam copper-polyurethane composite materials as possible to fill the O-shaped metal plate damper process parameters, such as foam copper-polyurethane composite material porosity, foam In the copper-polyurethane composite material, the polyurethane filling integral, the thickness of the O-shaped metal ...

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Abstract

The invention provides a composite material filled O-shaped metal plate damper and an arrangement and parameter optimization method thereof. Pin heads (1) with piston rods (3) at the two ends of the damper bear loads; the starting ends of the piston rods are fixed to the pin heads, and the tail ends of the piston rods are connected with shape memory parts (5) in a damping cavity in the middle section of the damper through fasteners (4); and damping objects (12) are filled in the damping cavity and the shape memory part. A plurality of structures consume energy together, and when one element issubjected to fatigue failure, the structure can still ensure that the whole damper continues to work; and the damper and various supports of a cable-stayed bridge can be jointly arranged to form a damping system, it can be guaranteed that transverse and longitudinal reasonable damping of the cable-stayed bridge is achieved when an earthquake occurs, and the energy consumption efficiency of the damper is improved.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to an O-shaped metal plate damper filled with composite materials and a method for its arrangement and parameter optimization. Background technique [0002] my country has a vast territory and is located at the junction of the Pacific plate, the Eurasian plate, and the Indian Ocean plate. Seismic activities are frequent, and structures are easily damaged under earthquakes. Therefore, many shock-absorbing technologies have been developed in the process of structural design. The most common means of shock absorption on bridges is to set dampers. Common dampers include metal dampers, viscous dampers, friction dampers, etc., which face problems such as poor durability, complex structure, and high price. [0003] Domestically, in terms of the layout of bridge damping devices, more people consider the damping performance of the devices alone, and arrange the bridge damping only in t...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D19/04G06F30/13G06F30/27G06N3/12G06F111/06
CPCE01D19/00E01D19/04E01D19/046G06N3/126G06F30/13G06F30/27G06F2111/06
Inventor 许莉林若鸣毛祚财刘昌飞黄强俞伯林杨顺丁传辉
Owner FUZHOU UNIVERSITY
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