Variable stiffness tuned mass damper with dry friction plate

Abstract

The invention relates to a variable stiffness tuned mass damper with a dry friction plate. The variable stiffness tuned mass damper with the dry friction plate comprises a mounting box, cushioning materials, the dry friction plate, a mass block and an equal-stiffness spring, wherein the mounting box is arranged on a structure and vibrates with the structure; the inner wall of the mounting box is covered with the cushioning materials; the dry friction plate is paved on the inner bottom surface of the mounting box; the mass block is arranged on the dry friction plate which is arranged in the mounting box; the two ends of the equal-stiffness spring are separately connected to the top of the mounting box and the top of the mass block, and the equal-stiffness spring is arranged vertically. Themass block slides frictionally with the dry friction plate during horizontal movement; when the mass block is in horizontal periodic movement, centripetal force is provided by non-linear variable horizontal component of the equal-stiffness spring; and the mass block collides with the cushioning materials during horizontal unidirectional movement. Therefore, targeted transmission of structure high-order vibration energy is realized, vibration attenuation and energy dissipation efficiency is improved, a damper is replaced, the cost is reduced, and the whole structure is simple in design and easyto install.

Description

technical field [0001] The invention belongs to the field of energy dissipation and vibration reduction of civil engineering structures, and in particular relates to a variable stiffness tuning mass damper with a dry friction plate. Background technique [0002] In the field of energy dissipation and vibration reduction of civil engineering structures, tuned mass dampers can effectively attenuate the vibration response of structures, and are easy to install and reliable in performance, so they are currently widely used energy dissipation and shock absorption devices. A tuned mass damper is generally composed of a mass block, a spring, and a damper. It adjusts the vibration frequency of the damper to the vicinity of the main frequency of structural vibration. Through the interaction with the structure, the energy is transferred from the structure to the damper, thereby achieving The purpose of reducing structural vibration. [0003] There are two types of existing mass-tuned...

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Problems solved by technology

[0003] There are two types of existing mass-tuned dampers: suspension type and sliding rail type. The suspension type mass-tuned damper is equipped with a structure such as a truss at the top of the structure, suspending the mass block with suspension cables, and installing a damper to dissipate energy. , its natural vibration frequency is related to the length of the suspension cable, the structure is complex, the project cost is high, and the construction is inconvenient; the slide rail type mass tuned damper sets the slide rail and spring system to make the mass move on the slide rail according to the set frequency, And install a damper to dissipate the capacity, but the effective frequency band is narrow, the vibration damping effect of the frequency that deviates from this frequency band is not good, the control effect is not ideal, and the realizability is poor

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