A quasi-zero stiffness vibration isolation device

A zero-stiffness, vibration-isolation technology, applied in the direction of vibration suppression adjustment, non-rotational vibration suppression, spring/shock absorber, etc., can solve the injury, increase the driver's back disease, and there is no good isolation method for low-frequency vibration etc. to achieve the effect of low cost and simple structure

Active Publication Date: 2018-09-28
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

In the shipbuilding industry, floating raft vibration isolation technology has been able to effectively isolate high-frequency vibrations of ships for a long time, but there is no good isolation method for low-frequency vibrations. Whether low-frequency vibrations can be well controlled has become a bottleneck in the development of submarines
In addition, the low-frequency vibration on the car seat will increase the probability of the driver suffering from low back diseases and bring them physical and mental harm. However, the isolation and suppression of dynamic excitation has always been difficult to solve The problem

Method used

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  • A quasi-zero stiffness vibration isolation device
  • A quasi-zero stiffness vibration isolation device
  • A quasi-zero stiffness vibration isolation device

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Embodiment Construction

[0023] The design idea of ​​the present invention is illustrated below by accompanying drawings.

[0024] Such as figure 1 As shown, point A is the position point on the hysteresis curve of the shape memory alloy wire after pre-stretching treatment, point B is the position point reached by the alloy wire after the strain continues to increase based on the pretreatment at point A, and point C is the The point where the strain decreases based on the pre-stretched length at point A. It can be seen that both A and B are on the upper platform of the hysteresis curve, and the ordinate (stress) remains unchanged; while C is on the lower platform of the hysteresis curve. Since the width of the hysteresis curve is extremely narrow, the upper and lower platforms almost overlap, so A and C The ordinate (stress) of is almost the same. To sum up, in the superelastic range of this shape memory alloy wire, no matter the strain increases or decreases, the restoring force remains basically u...

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Abstract

The invention discloses a quasi-zero-stiffness isolation mounting which comprises an upper cover plate, a pulley block, a shape-memory alloy wire, a workbench, a flexible thin-film, a fluid medium device and the like. According to the quasi-zero-stiffness isolation mounting, the shape memory alloy wire which is featured by extremely narrow width of the hysteretic curve is taken as an elastic element and is subjected to proprocessing to work in a hyperelasticity work interval. Within the hyperelasticity work interval, the resilience keeps constant nearly no matter the strain of the shape memory alloy wire increases or decreases, and thus, the shape memory alloy wire can be of basically constant static stiffness and basically zero dynamic stiffness. The quasi-zero-stiffness isolation mounting, utilizing the shape memory alloy wire as the elastic element, is effective in isolating ultra-low frequency vibration.

Description

technical field [0001] The invention relates to a quasi-zero stiffness vibration isolation device, more precisely, a vibration isolation device based on the superelastic mechanism of shape memory alloy wire. Background technique [0002] Vibration isolation devices can effectively isolate the vibration on mechanical equipment and reduce the harmful effects of vibration and noise, so they are an important part of equipment such as ships, vehicles and construction machinery. The increasingly integrated chip production process requires more and more sophisticated vibration isolation platforms to effectively isolate low-frequency micro-vibrations caused by the pulsation of the earth and tidal gravity. In the shipbuilding industry, floating raft vibration isolation technology has been able to effectively isolate high-frequency vibrations of ships for a long time, but there is no good isolation method for low-frequency vibrations. Whether low-frequency vibrations can be well contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/023F16F15/06
CPCF16F15/0237F16F15/06
Inventor 王林翔郭宁杜昊远吴庭
Owner ZHEJIANG UNIV
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