Adjustable nonlinear double-layer vibration isolation device

A non-linear and adjustable technology, applied in the direction of springs, magnetic springs, springs/shock absorbers, etc., can solve the problems of difficult control of negative stiffness characteristics, and achieve the effects of improved vibration isolation, good reliability, and fast response speed

Inactive Publication Date: 2018-03-16
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most nonlinear structures are realized by mechanical methods such as buckling beams and arranging transverse springs, which make it difficult to control the negative stiffness characteristics of these nonlinear structures.

Method used

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  • Adjustable nonlinear double-layer vibration isolation device
  • Adjustable nonlinear double-layer vibration isolation device
  • Adjustable nonlinear double-layer vibration isolation device

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Embodiment Construction

[0022] Referring to the accompanying drawings, an adjustable nonlinear double-layer vibration isolation device includes: an upper nonlinear stage 1, a lower shock absorber 2, two short side plates 3, two long side plates 4 and bolt assemblies 5;

[0023] The upper nonlinear stage 1 includes: connecting plate 1-1, M16 nut 1-2, magnet support table 1-3, ring magnet 1-4, coil magnet 1-5, guide rod 1-6, coil spring 1-7, Card holder 1-8, bottom plate 1-9; connecting plate 1-1 is a structure formed by the orthogonal connection of two rectangular plates, and four through holes 1A are distributed on the four corners of the top rectangular plate for connecting For vibration isolation equipment, four threaded holes 1B for connecting guide rods 1-6 are distributed on the four corners of the bottom rectangular plate, and there is a threaded blind hole 1G in the bottom center of the connecting plate 1-1; the magnet support table 1-3 is A stepped cylindrical structure, the outer circumferen...

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PUM

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Abstract

The invention belongs to the technical field of vibration noise control, and particularly relates to a nonlinear vibration-isolating device. The adopted technical scheme is as follows: an adjustable nonlinear double-layer vibration-isolating device comprises a nonlinear-level upper layer (1), lower-layer shock absorbers (2) and side plates, wherein the lower-layer shock absorbers (2) are lug boss-type rubber shock absorbers, and are connected with the bottom of the nonlinear-level upper layer (1). The adjustable nonlinear double-layer vibration-isolating device has the characteristics of low dynamic stiffness and high static stiffness; the low-frequency band vibration-isolating effect of the vibration-isolating device can be greatly improved while the static stability of the vibration-isolating device is ensured; the negative stiffness of the vibration-isolating device can be accurately adjusted by controlling the current magnitude and the current direction of a coil, so that the dynamic stiffness of the vibration-isolating device can be accurately adjusted and the vibration-isolating performance of the vibration-isolating device can be quickly and accurately changed; in addition, the adjustable nonlinear double-layer vibration-isolating device adopts a double-layer vibration-isolating structure, so that the high-frequency band vibration-isolating capability of the vibration-isolating device is further improved.

Description

technical field [0001] The invention belongs to the technical field of vibration and noise control, in particular to a nonlinear vibration isolation device. Background technique [0002] The effective vibration isolation bandwidth of traditional single-layer linear vibration isolators is limited by their own stiffness. For the linear vibration isolator, in order to improve its isolation ability to low-frequency vibration, its dynamic stiffness needs to be reduced, resulting in a weakening of its static stiffness, thereby reducing its bearing capacity, which is not conducive to the static stability of the vibration isolator . Therefore, scholars at home and abroad have proposed a nonlinear vibration isolation theory of "low dynamic stiffness and high static stiffness", that is, by introducing a nonlinear structure with negative stiffness into the traditional linear vibration isolator, it can offset the linear stiffness of the original vibration isolator , so as to achieve "...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F6/00
CPCF16F6/00
Inventor 杨恺周刘彬张胜业刘远国余永丰李强陈明
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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