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Method and device for calculating dynamic modulus and damping ratio

A dynamic modulus and damping ratio technology, applied in the field of data processing, can solve the problems of the limited dynamic triaxial test sensor test accuracy of the hysteretic loop method, the poor calculation accuracy of the dynamic modulus, and the large discreteness, etc., to broaden the strain test. Range, Reliability, and Confidence Effects

Active Publication Date: 2018-09-18
NANJING UNIV OF TECH
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Problems solved by technology

[0003] Although the above method can calculate the dynamic modulus, the hysteresis loop method is largely limited by the test accuracy of the dynamic triaxial test sensor
When the strain amplitude is small, due to the test accuracy, random noise in the test environment, etc., there is strong white noise in the collected stress and strain waveforms, which appear as many burrs and peaks on the waveform, which leads to calculation The dynamic modulus obtained has the disadvantages of poor calculation accuracy, large dispersion and unreliability.

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  • Method and device for calculating dynamic modulus and damping ratio
  • Method and device for calculating dynamic modulus and damping ratio
  • Method and device for calculating dynamic modulus and damping ratio

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0058] It should be noted that like numerals and let...

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Abstract

The embodiment of the invention provides a method and device for calculating dynamic modulus and damping ratio. The method for calculating the dynamic modulus comprises the following steps of: obtaining a first autocorrelation function of a stress time history according to a correlation function and collected stress data point information; obtaining a second autocorrelation function of a strain time history according to a correlation function and collected strain data point information; calculating the average amplitude of the stress time history through the first autocorrelation function; calculating the average amplitude of the strain time history through the second autocorrelation function; and obtaining the dynamic modulus according to the average amplitude of the stress time history,the average amplitude of the strain time history and a dynamic modulus calculating formula. The method for calculating the dynamic modulus has the characteristics of high reliability and high calculation precision and has the advantages that the influence of noise on the calculation process can be reduced and the strain testing range of a dynamic triaxial test for reliably testing the dynamic modulus can broadened.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a method and device for calculating dynamic modulus and damping ratio. Background technique [0002] The dynamic modulus and damping ratio of soil mainly reflect the nonlinear and hysteresis characteristics of the dynamic stress-dynamic strain relationship of the soil. Both the dynamic modulus and the damping ratio of the soil are parameters that vary with the strain amplitude. At present, the dynamic triaxial test of solid or hollow cylindrical specimens is the most widely used soil dynamic modulus and damping ratio test method at home and abroad. The test principle is to regard the soil as a viscoelastic body, and calculate the dynamic modulus and damping ratio through the stress-strain hysteresis loop under different strain amplitudes. [0003] Although the above method can calculate the dynamic modulus, the hysteresis loop method is largely limited by the test accur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/15
CPCG06F17/15
Inventor 梁珂陈国兴
Owner NANJING UNIV OF TECH
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