Tuned mass damper with variable stiffness, variable mass and variable damping and design method thereof

Abstract

The invention discloses a tuned mass damper with variable stiffness, variable mass and variable damping and a design method thereof. The damper comprises a mass system, a support and a damping system; the mass system comprises a mass block; the damper is characterized in that a plurality of guide rods are arranged on the support; the mass system can slide along the guide rods; the damping system is arranged on the support; the guide rods are sleeved with first springs; one end of each first spring is connected with the mass system; the other end of each first spring is connected with the support; a plurality of second springs are further arranged on the support; the second springs are connected with sliding blocks; locking structures are connected between the mass system and the sliding blocks; and the sliding blocks and the mass system can be connected or disconnected by locking or disconnecting the locking structures. By the adoption of the tuned mass damper with the variable stiffness, the variable mass and the variable damping, multi-order vibration of a structure can be controlled, the damper can adapt to natural vibration frequency in a wide range, and corresponding optimal damping can be set according to vibration of a main structure in different states, so that the adaptability and the restraining effect are greatly improved, and the device has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of vibration control, in particular to a tuned mass damper with variable stiffness, variable mass and variable damping and a design method thereof. Background technique [0002] When a structure is externally excited near a certain order of its own natural frequency, it is easy to cause resonance phenomenon, which leads to the destruction of the structure. The tuned mass damper has a good suppression effect on the vibration of the controlled structure with a frequency comparable to its natural frequency, and has been widely used in the field of vibration control of engineering structures. [0003] Existing tuned mass dampers usually can only suppress the vibration of the order that is close to the natural frequency of the structure and the tuned mass damper, but in practical engineering, it is often necessary to control the multi-order vibration of the structure. If you want to adjust the natural frequency ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the existing tuned mass dampers, which can only suppress a certain order of vibration, need to adjust the natural frequency or damping by replacing parts, poor adaptability, and difficult adjustment, etc., and provide a variable Tuned mass damper with variable stiffness and mass variable damping and its design method

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