Spring stiffness adjustable tuning quality damper

Abstract

The invention specifically relates to a mass tuned vibration reducer used for controlling the vibration of an aerobridge in the airport, a large-span pedestrian bridge, a port trestle, high-rise buildings and the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base; wherein, the spring can be a spiral spring, a disc spring or a plate spring, and the end part of the spring is provided with a rigidity regulating device. The mass tuned vibration reducer can successfully realize the regulation on the natural frequency of a TMD system under thecondition of needing not to assemble and disassemble the TMD since the end part of the spring is provided with the rigidity regulating device, so as to simplify the difficulty of regulation work, avoid the waste of manpower and materials and greatly reduce the construction cost. Meanwhile, the natural frequency and the damping of the system can be regulated in an optimized way under the conditionof needing not to assemble and disassemble the TMD, thereby better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring safety and stableness of the pedestriansand vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and in particular relates to a tuned mass damper for controlling the vibration of airport boarding bridges, long-span pedestrian bridges, port trestles, high-rise buildings and related structures. Background technique [0002] With the development of urban construction, various high-rise, ultra-high-rise buildings, thin-height structures, and long-span buildings are increasing. At the same time, the urban transportation network is becoming more and more developed. Bridge structures such as trestle bridges have been widely used, bringing great convenience to people's travel. However, although the strength and stiffness of such slender buildings and bridges are relatively easy to meet the design requirements, their vertical vibration frequencies are generally relatively low (for example, the vertical frequency of long-span pedestrian bridges is usually on...

AI Technical Summary

Problems solved by technology

However, the existing tuned mass dampers adjust the natural frequency by replacing the spring or changing the tuning mass, such as the directional vertically adjustable tuned mass damper disclosed in the Chinese patent application number 200410087664.2, however, relying on the replacement The spring method to solve such problems will inevitably lead to a great waste of materials and manpower, and the stiffness of the spring is also difficult to process particularly accurately, and the method of changing the tuning quality is also too rough to achieve precise adjustment

In particular, the working conditions at the installation site are often very simple, and it is very inconvenient to implement such adjustment methods involving TMD disassembly and assembly.

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