A Realization Method and Vibration Absorber Based on Hardened Cubic Stiffness

A cubic rigidity and realization method technology, applied in the direction of transmission, belt/chain/gear, inertial force compensation, etc., to achieve the effects of saving space, high reliability, and easy measurement

CN108644311BInactive Publication Date: 2019-09-06NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-09-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an implementation method and a vibration absorber based on hardened cubic stiffness vibration absorber. According to the nonlinear energy trap principle (NES), a vibration damping structure with strong nonlinear cubic stiffness can make the vibration energy of the main structure pass through the targeted energy transfer. The mode quickly accumulates in the NES oscillator and is dissipated in the NES oscillator through damping. The invention is based on a sinusoidal mechanism. Cooperating with the spiral track variable rocker length device, ball screw device and rack and pinion device, the restoring force of the vibrator meets the displacement cubic stiffness F=KX 3 design requirements. Based on this, an example of a vibration absorber is given, which provides the possibility to finally realize the targeted transmission of vibration energy of the vibration absorber. The invention has the following advantages: 1. The method is simple and highly precise; 2. The structure is compact and reliable; 3. It is convenient for theoretical analysis.
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Description

technical field

[0001] The invention relates to a vibration control technology of an engineering structure, specifically a dynamic vibration absorber with hardened cubic stiffness. Background technique

[0002] Vibration reduction by linear absorber technology is one of the most commonly used methods for passive control of structures. When the frequency of the vibrator is adjusted to be close to the frequency of the main structure, energy can be consumed through the anti-phase vibration of the mass block. However, the applicable frequency band of the traditional linear vibration absorber is narrow, and the vibration suppression performance is better only at the natural frequency of the vibration absorber.

[0003] Some scholars proposed a new type of nonlinear vibration-absorbing vibrator and named it "nonlinear energy sink" (NES). This kind of vibrator contains hardened cubic nonlinear stiffness. Hardening means that the spring stiffness is large and nonlinear, while cubi...

Examples

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 As shown, the main structure of the present invention is a sinusoidal mechanism, including a support 1, a rocking bar 2, a roller 3, a slider 4, a sliding guide rail 5, an elastic element 6 and a spring support 7; the rocking bar 2 is an input end, and the The bracket 1 rotates, the rocker 2 drives the slider 4 to move linearly through the roller 3 , and the slider 4 is connected with the spring support 7 through the elastic element 6 . The slider 4 is restricted by the sliding track 5 to move in a straight line parallel to it. There is an inner track perpendicular to the movement direction inside the slider 4. The sliding track 5 and the rotation center of the rocker 2 are on a straight line. When the rocker 2 swings at a certain angle θ , the roller 3 at the end of the rocker will push the slider through the inner track of the slider 4 to make a linea...