Internal collision type multi-mass damper

Abstract

The invention discloses an internal collision type multi-mass damper. A first mass block is connected with a mounting plate through a first elastic element, so that the effect of limiting the movement of all additional mass blocks is achieved, and the situation that the additional mass blocks are separated from a guide rail can be prevented; in addition, the damper has two energy consumption mechanisms, one energy consumption mechanism is collision energy consumption achieved after the adjacent additional mass blocks collide with each other, the other energy consumption mechanism is movement energy consumption achieved in the process that the additional mass blocks move on the guide rail, and the overall vibration reduction efficiency is greatly improved through superposition of the two energy consumption mechanisms; and meanwhile, due to the fact that collision occurs between the adjacent additional mass blocks, huge acting force at the moment of collision cannot be generated on a main body structure provided with the additional mass blocks, and the situation that the main body structure is locally damaged can be effectively avoided.

Description

technical field [0001] The invention relates to the field of structural control devices, in particular to an internal collision vibration type multi-mass damper. Background technique [0002] Common mass dampers in the prior art include the following types: tuned mass damper (TMD), nonlinear energy well (NES) and bump-type mass damper. [0003] Wherein, the spring component in the tuned mass damper is a linear spring, and the stiffness of the linear spring does not change with its own expansion and contraction. Therefore, when the additional mass and spring stiffness of the tuned mass damper are determined, the tuned mass damper has only one constant natural frequency. When the natural frequency of the main structure changes, the tuned mass damper and the main structure are no longer tuned, and an effective resonance mechanism cannot be formed between the two, and the vibration reduction performance of the tuned mass damper will be greatly degraded, that is, the tuned mass ...

AI Technical Summary

Problems solved by technology

However, the collision of the impact-vibration mass damper occurs between the additional mass and the main structure, and a huge acceleration and force will be generated at the moment of the collision, which will easily cause excessive force on the component and cause local damage, and aggravate the user's human body. sensory and psychological panic

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