Series-parallel tuning inertial damper

Abstract

The invention provides a series-parallel tuning inertial damper. The series-parallel tuning inertial damper comprises a shell body, a shearing rotating part and a screw rod, the shell body is provided with a cavity, an inner supporting sleeve is arranged at the bottom of the cavity, and an accommodating space is formed between the inner wall of the shell body and the inner supporting sleeve to contain a viscous medium. The shearing rotating part is rotatably arranged in the cavity and located above the inner supporting sleeve, a rotating cutting piece is arranged on the shearing rotating part to shear the viscous medium to generate the damping effect, and the screw rod penetrates through the shell body and extends into the sleeve, and the screw rod is in spiral transmission with the shearing rotating part to convert axial movement of the screw rod into rotating movement of the shearing rotating part. The viscous medium generates dragging force distributed on the whole circumference on the rotating cutting piece due to the viscous characteristic of the viscous medium, so that large torque is formed on a rotating shaft, and the torque is converted into a large damping force for hindering the axial movement of the screw rod through the shearing rotating part, so that the damping force acts on an engineering structure.

Description

technical field [0001] The invention belongs to the technical field of engineering structure vibration control, in particular to a series-parallel tuned inertial damper. Background technique [0002] Structural vibration control is a widely used and interdisciplinary theoretical and engineering problem. Specifically, it refers to the adoption of certain measures to make the dynamic response of the structure meet a certain threshold, that is, to meet the engineering requirements. There are many types, different control objectives, and various means of realization. At present, domestic and foreign people attach great importance to this problem, and scientific research and engineering personnel have carried out a lot of research, experiment and engineering application on this kind of problem. [0003] From the perspective of the external energy demand of the control process, structural vibration control can be divided into: passive structure control, active structure control, h...

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Problems solved by technology

But at the same time, the traditional viscous shear damper has the following disadvantages: first, the damper itself has a certain internal stiffness, which weakens its damping effect; The reason may lead to the mutual collision of slices inside the damper, which greatly shortens the service life, and even directly makes the device fail; third, the damping force asymmetry problem, the vertical shear between the slices of the traditional viscous shear damper and the viscous medium shear movement, when the shear plate is immersed in the viscous medium when it is compressed, the shear area increases, while the area decreases when it is tensioned, which leads to the asymmetry of the mechanical properties of the traditional viscous shear damper under tension and compression , this phenomenon is most significant when the displacement amplitude is large

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