Vibrational energy collection device based on nonlinear energy sink

Abstract

The invention belongs to the technical field of vibration noise control and energy collection, and relates to a mechanical device integrating the functions of broadband vibration absorption and vibrational energy collection. The mechanical device mainly comprises a baseplate, a nonlinear energy sink mechanism and a vibrational energy collection unit, wherein a buckling beam, the two ends of whichare compressed, and magnetic spring mechanisms arranged at the two sides jointly provide the pure cubic nonlinear stiffness required by the nonlinear energy sink; and the vibrational energy collectionunit mainly comprises an induction coil. The mechanical device can realize the fast, efficient and irreversible transfer of vibrational energy of external mechanical equipment to the non-linear energy sink mechanism in a broadband range, so that the equipment vibration is suppressed; energy absorbed by the non-linear energy sink mechanism can be further dissipated through electromagnetic dampingand is converted into electrical energy for storage, and thus, the dual functions of vibration control and energy collection are realized. The mechanical device has the advantages of wide vibration absorption frequency band, high vibration absorption efficiency, high energy collection efficiency and the like, is simple and compact in structure and has strong applicability.

Description

technical field [0001] The invention belongs to the technical fields of vibration and noise control and vibration energy collection, and in particular relates to a vibration energy collection device based on a nonlinear energy well. Background technique [0002] As we all know, dynamic vibration absorbers are usually composed of mass blocks, springs and viscous dampers, and are widely used in buildings, machinery and other structures. Traditional linear dynamic vibration absorbers can only effectively suppress vibration when the natural frequency of the vibration absorber is equal to the vibration frequency of the structure. , and has two resonance peaks. In order to overcome the disadvantage that the linear dynamic vibration absorber can only suppress vibration in a narrow frequency range, in recent years, many scholars at home and abroad have shown that introducing nonlinearity into the dynamic vibration absorber can effectively increase vibration suppression. The bandwidt...

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Problems solved by technology

The resonance phenomenon will aggravate the vibration of mechanical equipment, increase the noise of the mechanical system, and greatly damage the life of the equipment.

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