A Quasi-Zero Stiffness Vibration Isolator Using Destabilizable Simply Supported Beams as Positive Stiffness Loading Elements

A quasi-zero stiffness, load-bearing element technology, applied in the functional characteristics of spring/shock absorber, design characteristics of spring/shock absorber, spring/shock absorber, etc., can solve the problems of small vibration isolation interval and large vibration isolation frequency , to achieve the effect of large vibration isolation range, low dynamic stiffness, and excellent bearing performance

Active Publication Date: 2022-04-29
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the existing quasi-zero-stiffness vibration isolator has a relatively high frequency of vibration isolation and a small vibration-isolation interval, the present invention further provides a quasi-zero-stiffness vibration isolator with a destabilizable simply supported beam as a positive-stiffness load-bearing element ;

Method used

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  • A Quasi-Zero Stiffness Vibration Isolator Using Destabilizable Simply Supported Beams as Positive Stiffness Loading Elements
  • A Quasi-Zero Stiffness Vibration Isolator Using Destabilizable Simply Supported Beams as Positive Stiffness Loading Elements
  • A Quasi-Zero Stiffness Vibration Isolator Using Destabilizable Simply Supported Beams as Positive Stiffness Loading Elements

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specific Embodiment approach 1

[0024] Specific implementation mode one: refer to Figure 1 to Figure 4 Describe this embodiment. This embodiment provides a quasi-zero-stiffness vibration isolator with a destabilizable simply supported beam as a positive-stiffness bearing element. The quasi-zero-stiffness vibration isolator includes two simply supported beams 1 and a lower hinged seat 2 , guide rod 3, bearing platform 4, multiple vibration isolation units and base 7;

[0025] The guide rod 3 is vertically arranged on the base 7, and one end of the guide rod 3 is affixed to the upper surface of the base 7, the lower hinge seat 2 is sleeved on the bottom of the guide rod 3, and the lower hinge seat 2 is fixed on the On the upper surface of the base 7, the bearing platform 4 is sleeved on the top of the guide rod 3, and the bearing platform 4 is slidingly connected with the guide rod 3, and two simply supported beams 1 are relatively arranged on both sides of the bearing platform 4, and each simple One end of ...

specific Embodiment approach 2

[0027] Specific implementation mode two: refer to Figure 1 to Figure 4 This embodiment is described. This embodiment is to further limit the simply supported beam 1 described in the first specific embodiment. In this embodiment, the simply supported beam 1 is an arc-shaped plate structure. Other compositions and connection methods are the same as those in Embodiment 1.

[0028] With this arrangement, the initial state of the simply supported beam 1 is an arc-shaped structure, which is beneficial for the simply supported beam 1 to be bent along the arc direction after the platform bears heavy objects, and the deformation direction of the simply supported beam 1 when the force is applied is clearly defined.

specific Embodiment approach 3

[0029] Specific implementation mode three: refer to Figure 1 to Figure 4 Describe this embodiment, this embodiment is to further limit the lower hinged seat 2 described in the second specific embodiment, in this embodiment, the lower hinged seat 2 includes a fixed plate and two support seats, the top surface of the fixed plate A through hole is processed in the center, and two support seats are arranged under the fixed plate, and the two support seats are arranged opposite to each other along the axis of the through hole. Each support seat is fixedly connected with the lower surface of the fixed plate, and the fixed plate passes through the through hole sleeve Located at the lower part of the guide rod 3, two hinge points are arranged on the fixed plate, and each hinge point is set correspondingly to a simply supported beam 1. Other compositions and connection methods are the same as those in the second embodiment.

[0030] In this way, the lower hinge seat 2 is used to prov...

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Abstract

A quasi-zero-stiffness vibration isolator with an unstable simply supported beam as a positive-stiffness load-bearing element belongs to the technical field of mechanical vibration and noise control. For the problem of small vibration isolation intervals, the invention provides a quasi-zero-stiffness vibration isolator with a destabilizable simply supported beam as a positive stiffness load-bearing element. The simply supported beam that makes full use of the initial geometric defects has the ability to The excellent characteristic of obtaining very low dynamic stiffness without sacrificing its load-bearing capacity, combining it with the negative stiffness structure constructed by a pair of symmetrical oblique springs further reduces the dynamic stiffness of the simply supported beam, so as to maintain excellent load-bearing performance At the same time, a larger vibration isolation interval is obtained. Compared with the traditional quasi-zero stiffness vibration isolator, the present invention has a lower vibration isolation frequency and a larger vibration isolation interval.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration and noise control, and in particular relates to a quasi-zero-stiffness vibration isolator with an unstable simply supported beam as a positive-stiffness load-bearing element. Background technique [0002] The quasi-zero stiffness vibration isolator has high static and low dynamic stiffness characteristics, which can effectively improve the stability and static load capacity of the vibration isolation system, and has superior low-frequency vibration isolation performance. The quasi-zero stiffness vibration isolator is a combined vibration isolator that connects positive and negative stiffness elastic elements in parallel at the static equilibrium position to obtain zero stiffness. By rationally optimizing the geometry and stiffness parameters of the positive and negative stiffness elements, the large bearing capacity of the vibration isolation system can be achieved At the same time, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F3/02F16F15/06
CPCF16F3/026F16F15/06F16F2238/026F16F2238/022F16F2230/0052F16F2228/06
Inventor 温舒瑞晁廷龙李凤明
Owner HARBIN ENG UNIV
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