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A Variable Stiffness Nonlinear Energy Well Vibration Reduction Method Based on Magnetic Liquid Suspension Characteristics

A non-linear energy trap, magnetic liquid technology, applied in shock absorbers, non-rotating vibration suppression, shock absorbers, etc., can solve the problems of no active response to external vibration, limited vibration reduction effect, etc., to achieve simple structure, use Flexibility and reduced energy consumption

Active Publication Date: 2022-07-12
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] In related technologies, nonlinear energy trap devices designed based on the principle of targeted energy transfer and shock absorbers based on the second type of suspension characteristics of magnetic liquids mostly adopt passive control, do not have active response to external vibrations, and have limited vibration reduction effects

Method used

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  • A Variable Stiffness Nonlinear Energy Well Vibration Reduction Method Based on Magnetic Liquid Suspension Characteristics
  • A Variable Stiffness Nonlinear Energy Well Vibration Reduction Method Based on Magnetic Liquid Suspension Characteristics
  • A Variable Stiffness Nonlinear Energy Well Vibration Reduction Method Based on Magnetic Liquid Suspension Characteristics

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Embodiment Construction

[0050] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0051] Combine below Figure 1 to Figure 9 A nonlinear-magnetorheological self-tuning vibration absorber 10 according to an embodiment of the present invention is described in detail. The nonlinear-magnetorheological self-tuning vibration absorber 10 is one of the most promising hydraulic system vibration control devices, and will have wide application prospects in the field of hydraulic engineering.

[0052] combine figure 1 , a nonlinear-magnetorheological self-tuning vibration absor...

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Abstract

The invention discloses a variable stiffness nonlinear energy trap vibration damping method based on the suspension characteristics of magnetic liquid. The nonlinear stiffness is generated by the axial and radial suspension forces generated by the magnetic liquid under the action of a non-uniform magnetic field. When the external excitation causes the dynamic mass When moving relative to the guide assembly, a one-way targeted energy transfer is generated. Then, the absorbed energy causes the magnetic liquid in the vibration absorber to be squeezed. The drive module is used to receive the control signal output by the electronic control unit, and apply the control signal. With a certain gain, an alternating current with a certain amplitude and frequency is generated as a driving signal to act on the stator, and the distributed electromagnetic generation produces a shearing effect on the flow gap of the magnetic liquid, which causes the magnetic liquid to generate a magnetic current in the two working modes. Change effect, form a damping force opposite to the excitation direction to dissipate energy. The invention has obvious damping effect, low cost, small volume and flexible use.

Description

technical field [0001] The invention belongs to the technical field of dynamic vibration reduction, and in particular relates to a variable stiffness nonlinear energy trap vibration reduction method based on magnetic liquid suspension characteristics. Background technique [0002] Nonlinear Energy Sink (NES) is a spring oscillator structure with cubic nonlinear stiffness and linear damping. It is an efficient vibration control device. Strong nonlinear stiffness and damping elements. Among them, nonlinear stiffness can provide nonlinear restoring force, so that NES has a non-constant natural frequency, so NES can have transient resonance capture (Transient Resonance Capture) with a series of modes of the main structure, thereby expanding its vibration reduction frequency band . In addition, the damping element can consume the vibration energy absorbed by the NES from the main structure, and finally achieve the purpose of energy dissipation and vibration reduction. NES has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/53F16F15/00
CPCF16F9/535F16F15/002
Inventor 纪辉恭飞聂松林宁冬晶
Owner BEIJING UNIV OF TECH
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