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Novel layered slope earthquake damage instability calculating system and method based on energy demodulation frequency spectrum

A technology of earthquake damage and calculation system, applied in the direction of seismic signal processing, etc., can solve problems such as the inability to deal with the evaluation of slope seismic stability, and achieve the effect of ensuring accuracy

Active Publication Date: 2018-08-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] 3. The original calculation theory cannot deal with the complex seismic stability evaluation of slopes, especially the seismic instability of layered slopes. This patent can consider the seismic instability of layered slopes

Method used

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  • Novel layered slope earthquake damage instability calculating system and method based on energy demodulation frequency spectrum
  • Novel layered slope earthquake damage instability calculating system and method based on energy demodulation frequency spectrum
  • Novel layered slope earthquake damage instability calculating system and method based on energy demodulation frequency spectrum

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no. 1 example

[0033] see figure 1 , a novel layered slope seismic damage and instability calculation system based on energy demodulation spectrum provided by an embodiment of the present invention, the system includes:

[0034] The seismic wave time history curve module is used to obtain the time history curve of the seismic wave;

[0035] The STFT demodulation curve module is used to obtain the typical frequency-time history curves and energy spectrum curves of each order of reflected waves and transmitted waves;

[0036] The multiple seismic excitation module is used for multiple seismic excitations in the frequency domain;

[0037] The secondary stress redistribution module is used to calculate the secondary stress redistribution;

[0038] Structural slope block stress calculation module, used to solve the average stress state on each interface, draw the structural surface stress field of the slide body, slice the slope horizontally and transversely, and solve the sliding force and An...

no. 2 example

[0206] A novel calculation method for seismic damage and instability of layered slopes based on energy demodulation spectrum, said method comprising:

[0207] Step 1: Establish a generalized geological model of the slope;

[0208] Step 2: Input and check the seismic wave;

[0209] Step 3: According to the integration of the ground motion acceleration time history curve, the displacement time history curve is obtained; the seismic displacement time history curve of the initial reflected wave and the transmitted wave and the reflected and transmitted wave time history curves on each subsequent interface are calculated;

[0210] Step 4: Use STFT transformation to obtain typical frequency-time history curves and energy spectrum curves of each order of reflected waves and transmitted waves;

[0211] Step 5: Calculate the stress components at different positions through the frequency-time history curve;

[0212] Step 6: Use the method from step 1 to step 5 to solve the average str...

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Abstract

The embodiment of the invention provides a novel layered slope earthquake damage instability calculating system and method based on an energy demodulation frequency spectrum, and relates to the geological technical field; the system comprises the following parts: a seismic wave time travel curve module used for obtaining a seismic wave time travel curve; a STFT demodulation curve module used for obtaining reflection wave and penetrated wave each order typical frequency time travel curve and energy spectrum curve; a multi-earthquake excitation module used for carrying out multi-earthquake excitations in a frequency domain; a secondary stress redistribution module used for calculating secondary stress redistribution; a structural slope partitioning stress calculation module used for solvingthe average stress state on each interface, drawing a sliding mass structural surface stress field, horizontally and transversely stripping the slope, and solving the lower sliding force and anti-sliding force of corresponding positions on the strip interfaces; a damage mode analysis module used for analyzing damage modes; a stability state evaluation module used for evaluating stability states. The method and system are high in calculating efficiency and accuracy.

Description

technical field [0001] The invention relates to the field of geological technology, in particular to a novel layered slope seismic damage and instability calculation system and method based on energy demodulation spectrum. Background technique [0002] 1. The HHT theory lacks rigorous physical and mathematical meanings, and requires complex recursion. The calculation time is longer than the short-time Fourier transform. Only in special cases (combining simpler data) is Hilbert- The yellow conversion is faster, resulting in lower calculation efficiency when evaluating slope instability problems, and the calculation efficiency of this patent is higher. [0003] 2. The HHT theory may not be able to correctly calculate the instantaneous frequency of the essential mode function, and the fast Fourier transform cannot be used, resulting in a limited range of use, and the scope of use of this patent is not limited; in addition, due to the above-mentioned defects in the original theo...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 李龙起巨能攀张帅邓小雪邓天鑫
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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