A Nonlinear Energy Well with Segmented Linear Beams Applied to Rotor Systems

Abstract

A nonlinear energy sink (Nonlinear energy sink, NES) with a segmented linear beam applied to a rotor system of the present invention includes an NES frame, a plurality of leaf springs and a plurality of mass blocks, and one end of the leaf spring is connected to the NES frame , the other end is correspondingly connected to a mass block, and a plurality of leaf springs are evenly arranged. In the present invention, the cubic stiffness beam is equivalently replaced by a segmented linear stiffness beam. The fitting accuracy of the nonlinear energy well to the cubic stiffness is high, and the change of the segmental linear stiffness is related to the vibration displacement of the system. By changing the segmented linear beam and The gap between the mass blocks can effectively change its nonlinearity; the nonlinear energy well allows the energy of the system to be damped to be transmitted to the outside of the system through the nonlinear energy well for consumption. Its structure is simple and compact, and its design is reasonable. The effect is remarkable.

Description

technical field [0001] The invention belongs to the technical field of vibration absorbing devices, and relates to a nonlinear energy well with segmented linear beams applied to a rotor system. Background technique [0002] Rotating machinery is widely used in the national economy. Among the many failure causes of rotating machinery, the failure caused by vibration accounts for a large proportion. For high-speed rotating machinery, the rotor system often has excessive vibration during operation. When the operating speed of the rotor is equal to or close to the critical speed, the equipment will resonate, and the amplitude of the rotating machinery will increase sharply when the resonance frequency is too high, so it will cause serious damage to the machine, not only affecting the stable operation of the equipment, Some even cause catastrophic consequences, so the research on vibration control methods of rotating machinery is particularly important. [0003] At present, the ...

AI Technical Summary

Problems solved by technology

The structure of passive vibration absorption is simple, but the vibration suppression frequency band is narrow; the vibration suppression frequency range of the active vibration absorption method is large, but the structure is complex, which is not suitable for application in more precise rotating machinery, and the reliability will be reduced when the working conditions are complicated.

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