Two-degree-of-freedom collision nonlinear vibration-eliminating device

Abstract

The invention relates to a two-degree-of-freedom collision nonlinear vibration-eliminating device, and belongs to the field of structural engineering vibration controlling. The two-degree-of-freedom collision nonlinear vibration eliminating device comprises a structure bottom plate 1, a lower layer shell 3, a lower layer mass block 4, an upper layer mass block 9, a collision contacting pin 5, a lower layer linear spring 2, an upper layer linear spring 6, an upper layer shell 7, a motion guiding shaft 8 and a fixing bolt 10. The lower layer mass block 4, the upper layer mass block 9 are connected with the structure bottom plate 1 and the upper layer shell 7 through the lower layer linear spring 2 and the upper layer linear spring 6; and when the vibration eliminating device reaches a specified position, inelastic collision occurs between the lower layer mass block 4 as well as the upper layer mass block 9 and the lower layer shell 4 through the collision contacting pin 5, mechanical energy in the structure is changed, and the goal of vibration reduction is achieved. According to the two-degree-of-freedom collision nonlinear vibration eliminating device, compared with a traditional vibration absorber and a damper, the mechanical energy of a system can be consumed in a wide range, and response of the structure is rapidly reduced, and the two-degree-of-freedom collision nonlinear vibration eliminating device has the prospect of wide application in practical engineering.

Description

technical field [0001] The invention belongs to the field of structural engineering vibration control, and in particular relates to a two-degree-of-freedom collision nonlinear vibration elimination device. Background technique [0002] Vibration phenomena widely exist in production and life. The buildings we live in, the bridges and railways we use, and the things we usually take such as trains, cars, ships and airplanes all have vibrations to varying degrees. Machinery manufacturing, aerospace, power generation and other fields in industrial production are facing serious vibration problems. Traditional vibration control strategies are implemented through passive control devices. Passive control usually has the advantages of simple structure, easy implementation, no need for external energy, and good stability. Among them, the tuned mass damper is widely used. By selecting mass parameters, damping parameters and stiffness parameters reasonably, the tuned mass damper can ...

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Problems solved by technology

However, the energy consumption of this invention is achieved through damping, which cannot overcome the shortcomings of damping energy consumption

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