Vibration reduction method and system for low frequency elastic waves, and vibration reduction device

A vibration damping device and elastic wave technology, applied in the functional characteristics of spring/shock absorber, shock absorber, spring/shock absorber, etc., can solve the problem of not meeting the requirements of invariance, unable to meet the design conditions of winding materials, Does not have immutability and other issues

Active Publication Date: 2018-10-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the governing equations of elastic waves are different from the governing equations of electromagnetic waves and acoustic waves. In the transformation from a uniform field to a curved field, the forms of the governing equations of elastic waves will change before and after the transformation, that is, they do not have the invariance

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  • Vibration reduction method and system for low frequency elastic waves, and vibration reduction device
  • Vibration reduction method and system for low frequency elastic waves, and vibration reduction device
  • Vibration reduction method and system for low frequency elastic waves, and vibration reduction device

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Embodiment 1

[0129] The vibration reduction method for low-frequency elastic waves in the embodiment of the present invention is suitable for reducing the vibration of the component to be isolated caused by the elastic waves generated by the excitation source, and the specific solution includes the following steps a) to c).

[0130] a) Construct a vibration damping device with a specified thickness according to the characteristics of the elastic wave and the vibration damping requirements of the parts to be isolated. Any two cross sections in the thickness direction of the vibration damping device have the same shape, and the shape of the cross section is a semicircle Annular, the vibration damping device also has two end faces, the two end faces are perpendicular to the cross section, when the elastic wave is incident on the vibration damping device from one of the two end faces, it propagates along the interior of the vibration damping device to the two end faces When the other end face i...

Embodiment 2

[0139] The specific scheme of the vibration damping method for low-frequency elastic waves in the embodiment of the present invention is the same as in Embodiment 1, except that the vibration damping device is constructed in the following manner in this embodiment:

[0140] The first step is to select the first rubber and mold the first rubber to obtain a semi-circular matrix with a specified thickness, wherein the first Lamé constant and the second Lamé constant of the first rubber are λ 1 , G 1 .

[0141] In the second step, select the second rubber, the first Lamé constant and the second Lamé constant of the second rubber are λ 2 , G 2 , where λ 2 1 , G 2 1 .

[0142] In the third step, a plurality of columns of through holes arranged radially are formed on the semi-circular substrate according to predetermined rules.

[0143] Figure 8 It shows a schematic diagram of the distribution of multiple columns of through holes formed on the semi-annular substrate according...

Embodiment 3

[0146] The specific scheme of the vibration damping method for low-frequency elastic waves in the embodiment of the present invention is the same as in Embodiment 1, except that the vibration damping device is constructed in the following manner in this embodiment:

[0147] The first step is to select the first rubber and mold the first rubber to obtain a semi-circular matrix with a specified thickness, wherein the first Lamé constant and the second Lamé constant of the first rubber are λ 1 , G 1 .

[0148] In the second step, select the second rubber, the first Lamé constant and the second Lamé constant of the second rubber are λ 2 , G 2 , where λ 2 1 , G 2 1 .

[0149] In the third step, multiple rows of through holes arranged in parallel are formed on the semi-circular base according to predetermined rules.

[0150] Figure 9 It shows a schematic diagram of the distribution of multiple rows of through holes formed on the semi-annular substrate according to predetermi...

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Abstract

The invention provides a vibration reduction method and system for low frequency elastic waves, and a vibration reduction device. According to the technical scheme of the invention, the vibration reduction device is manufactured according to the characteristics of the elastic waves and the vibration reduction requirements, and the shape, size and material parameters of the vibration reduction device are designed, so that when the vibration reduction device is used as a transmission space for the elastic waves, the transformation of an elastic wave control equation approximately meets the invariance requirement, so that during vibration reduction, after the elastic waves enter the vibration reduction device from the end face, located on a path that the elastic waves are transmitted to a component to be isolated from vibration, of the vibration reduction device, the transmission direction of the elastic waves bends, and the elastic waves can be transmitted to the other end face of the vibration reduction device along the interior of the vibration reduction device, so that the transmission direction of the elastic waves is changed, and the elastic waves transmitted to the component tobe isolated from vibration are reduced so that the vibration reduction is achieved. According to the technical scheme, the vibration reduction device has an obvious vibration reduction effect on thelow frequency elastic waves within the frequency band range of 332-1800 Hz.

Description

technical field [0001] The present invention relates to the technical field of vibration reduction, in particular to a vibration reduction method, system and vibration reduction device for low-frequency elastic waves. Background technique [0002] Vibration reduction is the main measure taken in engineering to reduce the impact of mechanical vibration on the normal operation of machines, structures or instrumentation equipment, and to prevent vibration hazards. Vibration reduction can be divided into active vibration reduction and passive vibration reduction. Active vibration reduction, also known as active vibration reduction, is mainly composed of vibration detection devices, control devices, actuators and other components. It consumes external energy during work. The vibration detection device first detects the vibration direction and kinetic energy, and the control device controls the actuators to do work to offset vibration. Passive vibration reduction, also known as ...

Claims

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Application Information

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IPC IPC(8): F16F7/00
CPCF16F7/00F16F2224/025F16F2228/04
Inventor 高赫轩向志海
Owner TSINGHUA UNIV
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