Non-deflection rod type high-frequency tuning mass damper

Abstract

The invention relates to a non-deflection rod type high-frequency tuning mass damper and belongs to the technical field of civil engineering structure damping. The problems that the occupied space is large, the applicability is not high, the cost is high, and precise frequency modulation cannot be achieved in the prior art are solved through the non-deflection rod type high-frequency tuning mass damper. The non-deflection rod type high-frequency tuning mass damper comprises a mass block, an elastic element and a damping element. The elastic element comprises at least two elastic rods. The two ends of the elastic rods are supported on a bracket, and the mass block is connected with the elastic rods; or, one ends of the elastic rods are supported on the bracket, and the other ends of the elastic rods are connected with the mass block. When all the elastic rods work, the component force of the dynamic restoring force resultant force at least in the perpendicular direction passes the mass center of the mass block or passes the position near the mass center. The damping element is directly arranged on the surfaces of the elastic rods or is connected with the mass block. The non-deflection rod type high-frequency tuning mass damper is higher in applicability and performance price ratio, capable of being widely used for high-frequency vibration control over underground track beds and other structures and very wide in market application prospects.

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 vibration damper for controlling high-frequency vibrations of building structures. Background technique [0002] A large number of engineering practices have proved that the tuned mass damper (also called mass tuned damper in the literature, or mass tuned damper, also referred to as TMD in this paper) is an effective vibration control device, and its natural frequency is adjusted to close to the natural frequency of the main structure, and then installed on the main structure. When the main structure is disturbed by the exciting force and vibrates, the resonance of the mass-tuned damper is caused, and the vibration inertia force of the tuning mass is used to react against the structure itself, thereby offsetting the exciting force and reducing the structural response. In order to maximize the damping effect of ...

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Problems solved by technology

However, in this type of structure, since the connecting rod is set at the center of the auxiliary mass, the anti-eccentric torsion accuracy is high, and the balance of the auxiliary mass cannot be guaranteed. The working attitude of the auxiliary mass is not stable, and its posture during motion is often not only There is movement and torsion at the same time, which cannot achieve precise frequency modulation, resulting in a deviation between the actual operating frequency of the system and the design frequency, thus affecting the final vibration reduction effect

In order to improve stability, it is generally necessary to increase the guiding structure. On the one hand, the complexity of the structure is increased, and the cost is increased; powerful

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