Gravity compensation nonlinear energy trap damping device

Abstract

The invention discloses a gravity compensation nonlinear energy trap damping device which comprises a connecting base, a guide rod, a mass block, a first linear spring, a second linear spring and a damper. The connecting base is in an inverted U shape and comprises a horizontally-arranged top plate and two oppositely-arranged side plates, the guide rod is vertically arranged between the two side plates, the upper end of the guide rod is fixedly connected with the top plate, the lower end of the guide rod penetrates through a center hole in the mass block, and the mass block can freely slide along the guide rod. The first linear springs are arranged on the guide rods in a sleeving mode, the two ends of each first linear spring are fixedly connected with the top plate and the mass block correspondingly, the two ends of each second linear spring are fixedly connected with the mass block and the corresponding side plate correspondingly, the dampers are vertically arranged, and the two ends of each damper are fixedly connected with the top plate and the mass block correspondingly. During vertical vibration, gravity compensation of the vibrator is achieved, pure cubic rigidity can be provided, targeted energy transfer is achieved, and the device has the advantages of being simple in structure, free of energy input and good in robustness.

Description

technical field [0001] The invention relates to the technical field of vibration reduction, in particular to a gravity compensation nonlinear energy well vibration reduction device. Background technique [0002] Vibration problems widely exist in many engineering fields such as aerospace, machinery, and civil engineering. For example, in the field of bridge engineering, with the use of lightweight and high-strength new materials, the development of construction and design technology, and the improvement of people's aesthetics of buildings, bridge structures tend to be more and more flexible. Flexible bridges have the characteristics of low structural stiffness, so their vibration problems are obvious (such as wind vibration, human-induced vibration, etc.), how to ensure the safety of the structure and vibration comfort is an urgent problem to be solved in the industry. Therefore, it is of great research significance to take effective measures for vibration control. [0003...

AI Technical Summary

Problems solved by technology

Theoretically, a classical nonlinear energy well is usually composed of mass elements, purely nonlinear stiffness elements and damping elements; but in practice, when the nonlinear energy well is applied to the vertical vibration control of structures, the gravity of the mass element itself will As a result, pure nonlinear stiffness is difficult to achieve, which makes it difficult for nonlinear systems to achieve targeted energy transfer, reducing the vibration damping effect of nonlinear energy wells

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