Nonlinear energy sink with segmented linear beams applied to rotor system

Abstract

The nonlinear energy sink (NES) with segmented linear beams applied to a rotor system. The nonlinear energy sink comprises a NES frame, a plurality of steel plate springs and a plurality of mass blocks, wherein one ends of the steel plate spring are connected with the NES frame, the other end of each steel plate springs is connected with a corresponding mass block, and the plurality of steel platesprings are uniformly arranged. According to the nonlinear energy sink, segmented linear stiffness beams are equivalently used for replacing cubic stiffness beams, the fitting precision of the nonlinear energy sink to the cube stiffness is high, the change of the segmented linear stiffness is related to the vibration displacement of a system, and by changing gaps between the segmented linear beams and the mass blocks, the non-linearity of the nonlinear energy sink can be effectively changed; and the energy of the system needing to be subjected to vibration reducing is transferred to the outside of the system for consumption through the nonlinear energy sink, the structure is simple and compact, the design is reasonable, the vibration suppression frequency band is wide, and the vibration suppression 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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