A two-dimensional magnetic liquid vibration absorber with nonlinear energy trap

Abstract

The invention discloses a two-dimensional magnetic liquid vibration absorber with a non-linear energy trap, comprising four vibration damping units in the directions of two moving degrees of freedom, and its structure is composed of a casing, a dynamic mass and a stator; wherein, the casing is composed of Left end cover, coil lead inlet, cylindrical shell, heat dissipation hole, right end cover, coil lead outlet, sealing ring; dynamic mass consists of left end nut, permanent magnet ring, magnetic conductive block, permanent magnet ring cage, right end nut, micro-nano It is composed of magnetic composite fluid; the stator is composed of a coil cage, a coil winding and a copper coil; the guide component includes a left limit block, a guide shaft, a right limit block and a lubrication groove. Based on the second type of suspension characteristics of the magnetic liquid, the invention realizes the vibration-targeted energy transfer between the nonlinear energy trap and the flow pipeline, and finally dissipates the vibration energy of the flow pipeline through the viscosity of the magnetic liquid.

Description

technical field [0001] The invention belongs to a self-tuning vibration absorber in the technical field of fluid transmission, in particular to a two-dimensional magnetic liquid vibration absorber containing a nonlinear energy trap. Background technique [0002] Fluid transmission technology uses fluid as the working medium to realize the transmission and control of information, motion and force energy. In recent years, with the development of mechatronics technology, combined with microelectronics and computer technology, fluid transmission has entered a new stage of development. For example, in a hydraulic system, due to the existence of internal excitations such as pumps, valves, branch pipelines, and external excitations such as foundation or slab vibration, the hydraulic pipeline structure and the fluid in the pipeline will be induced to vibrate. The vibration of these pipeline structures and fluids also The fluid-structure interaction (FSI) vibration will be generated...

AI Technical Summary

Problems solved by technology

Nonlinear Energy Sink (NES) has the advantages of small additional mass, wide vibration suppression frequency range, directional target energy transfer, high reliability, and strong robustness, which can effectively make up for the defects of TMD in the field of nonlinear vibration However, the existing nonlinear energy well devices (NES) are all passively controlled, and cannot be adjusted in time according to the characteristics of external excitation and the changes in the vibration characteristics of the structure itself, and there are certain limitations

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