Bidirectional shearing type inertial damper

Abstract

The invention provides a bidirectional shearing type inertial damper. The bidirectional shearing type inertial damper comprises a shell, two rotating structures, a protective cover and a shearing frame, wherein the shell is filled with a viscous medium; each rotating structure comprises a gear, an inertial disc and a rotating shaft, the rotating shaft is rotatably arranged in the shell, one end of the rotating shaft extends out of the shell and is connected with the inertial disc, the gear sleeves the periphery of the rotating shaft, and the gear is fixed relative to the rotating shaft; and the protective cover covers the shell and is used for connecting a vibration structure, the shearing frame is fixedly arranged in the protective cover and is meshed with the two gears, when the vibration structure vibrates in the direction along the axis of the shell and the direction perpendicular to the axis of the shell, the vibration in the direction along the axis of the shell forces the shearing frame to do axial reciprocating motion, so that the viscous medium is subjected to shearing deformation to generate a damping effect so as to inhibit the vibration in the direction along the axis, the vibration in the direction perpendicular to the axis of the shell enables the positions of the gears to become mechanical fulcrums, and the shearing frame deflects around the fulcrums to generate bending moment so as to inhibit the vibration in the direction perpendicular to the axis of the shell.

Description

technical field [0001] The invention belongs to the technical field of engineering structure vibration control, and relates to a two-way shear type inertial damper. Background technique [0002] Towering, long-span structures and components are prone to multiple vibrations under environmental excitations, jeopardizing safety and serviceability. In engineering, passive structure control, active structure control, hybrid structure control, and semi-active structure control schemes are often used to suppress the amplitude of vibration to meet safety and applicability requirements. Among them, the most commonly used method is to add dampers in passive structure control. This method mainly achieves the effect of energy consumption and vibration reduction by lifting the structure and damping of components. [0003] There are many kinds of dampers, and traditional dampers include viscous liquid dampers, viscous shear dampers, eddy current dampers, and rubber shock absorbers. For ...

AI Technical Summary

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 seriously weakens its damping effect; second, the traditional viscous shear damper is mainly aimed at damping along the The vibration in the axial direction of the device is poor in suppressing the vibration perpendicular to its axial direction, but in engineering practice, the structure often vibrates in two directions, and the excessive amplitude lateral vibration will also cause the shear frame and Therefore, how to simultaneously suppress the vibration along the axis of the damper and perpendicular to the axis of the damper is a challenge; third, the existing shear type inertial damper adopts precision mechanical structures such as screw rod transmission, Its applicability to harsh environments such as impact and high oil is not strong, and it needs to be hinged to install, and it also only has a control effect on vibration along the axis of the damper

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