Triaxial apparatus for synchronously loading high-frequency cyclic load under static load

A triaxial instrument and high-frequency technology, applied in the field of triaxial instrument, can solve the problems of low vibration frequency, unstable stress, low vibration frequency, etc., and achieve the effect of good durability, fast response speed and long expected service life of the equipment

Inactive Publication Date: 2020-05-08
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, there are problems such as low vibration frequency (generally lower than 20Hz), and the need for step-by-step excitation (the excitation frequency needs to be increased step by step from 0 to reach the target frequency, and there are problems such as disturbing the sample before reaching the target frequency), which is difficult Meet the experimental requirements of the above high-frequency cyclic loading conditions
[0004] At present, the mainstream driving methods of soil moving triaxial instrument include

Method used

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[0029] Hereinafter, the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention.

[0030] The present invention provides a triaxial instrument for synchronous loading of high-frequency cyclic loads under static load. Compared with traditional instruments, the load frequency range of the triaxial instrument is 0-120 Hz, which is much higher than the 20 Hz frequency of existing instruments, including The following structure:

[0031] 1) Main structure, 2) Loading system, 3) Pore pressure measurement system, 4) Acceleration measurement system, 5) Axial stress measurement system, 6) Displacement measurement system

[0032] Such as figure 1 As shown, the main structure of the triaxial apparatus includes a reaction force frame 21, a loading rod 12, a pressure chamber 27, a latex film-wrapped sample 8, a pressure chamber base 3, a triaxial apparatus base 1, and a triaxial apparatus base 1. In addition to the body structur

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PUM

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Abstract

The invention relates to a triaxial apparatus for synchronously loading a high-frequency cyclic load under a static load. A main body structure of the triaxial apparatus comprises a triaxial apparatusbase, a pressure chamber base and a reaction frame vertical rod arranged on the triaxial apparatus base, a pressure chamber fixed to the pressure chamber base in a sealed mode, a sample placed on thepressure chamber base, a reaction frame adjustably fixed to the upper portion of the pressure chamber through the reaction frame vertical rod, and a loading rod whose upper end and the lower end arefixed to the bottom face of the reaction frame and the top face of the sample respectively. The triaxial apparatus further comprises a static force loading system, a high-frequency cyclic load loadingsystem, a confining pressure loading system, a back pressure loading system, a computer for realizing control loading and an acquisition system for realizing acceleration measurement, deformation measurement and load measurement. Compared with the prior art, the triaxial apparatus has the advantages of realizing synchronous loading of static load and high-frequency cyclic load, being wide in loadfrequency adjustment range, being capable of realizing stepless speed regulation, being stable and reliable in loading mode, being simple to operate and the like.

Description

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Claims

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Application Information

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Owner TONGJI UNIV
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