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Noise adding device for SHPB shaper and damage analysis method

An analysis method, the technology of the shaper, applied in the direction of measuring devices, analysis materials, instruments, etc.

Pending Publication Date: 2022-07-22
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no shaper noise adding device that uses the shaper to extract the components of each frequency band of the complex waveform for later processing and analysis of the waveform such as wavelet transformation.

Method used

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  • Noise adding device for SHPB shaper and damage analysis method
  • Noise adding device for SHPB shaper and damage analysis method
  • Noise adding device for SHPB shaper and damage analysis method

Examples

Experimental program
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Embodiment Construction

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like figure 1 As shown, a noise adding device for SHPB shaper proposed by the present invention includes a device body 1 arranged between the incident rod 2 of the true triaxial Hopkinson pressure rod device and the high-pressure gas cannon 3 . like figure 2 As shown, the device body 1 is a steel cylinder structure, the cavity is closed, and several steel balls 5 with different particle sizes are arranged in the inner cavity of the device body 1; one end of the device body 1 is in contact with the high-pressure air gun 3, and the other end passes The rubber gasket 4 is in contact with the incident rod 2 of the true triaxial Hopkinson pressure rod device. The bottom surface area of ​​the device body 1 is the same as that of the rubber gasket 4 and the incident rod 2 .

[0035] like image 3 As shown, in this embodiment, the s...

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Abstract

The invention discloses an SHPB (split Hopkinson pressure bar) shaper noise adding device and a damage analysis method. The SHPB shaper noise adding device comprises a device body arranged between an incident bar and a high-pressure gas gun of a true triaxial Hopkinson pressure bar device, the device body is of a steel cylindrical closed cavity structure, and a plurality of steel balls with different particle sizes are arranged in an inner cavity of the device body; one end of the device body is propped against the high-pressure gas gun, and the other end of the device body is propped against an incident bar of the true triaxial Hopkinson pressure bar device through a rubber gasket. By designing the shaper noise adding device, the components of each frequency band of the incident wave are enriched, and the amplitude changes of the waves of different frequency bands of the incident wave and the transmitted wave are compared through a wavelet analysis method in the later period, so that the damage conditions of cracks, holes and the like in the sample are analyzed.

Description

technical field [0001] The invention relates to the technical field of rock mass mechanical testing, in particular to a noise adding device and a damage analysis method for an SHPB shaper. Background technique [0002] Rock, concrete and other materials contain a large number of holes, cracks, joints and other defects. Studying the damage and failure laws of rock, concrete and other materials under dynamic impact loading can better analyze the dynamic characteristics of rock, concrete and other solid materials. At the same time, understanding the dynamic damage evolution law of solid materials such as rock and concrete will help to qualitatively and quantitatively analyze the influence of the dynamic damage evolution of solid materials on the propagation and attenuation of ultrasonic and stress waves. At present, the research on the dynamic damage of rock, concrete and other materials is mainly based on the dynamic impact of the Hopkinson compression bar (SHPB compression b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/06G01N3/02G01N3/307
CPCG01N3/06G01N3/02G01N3/307
Inventor 罗忆李帅豪龚航里李新平郭运华孟飞黄俊红陶宇航李桥梁邓运辰
Owner WUHAN UNIV OF TECH
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