Landslide process analysis method, process numerical reconstruction method and application
A process analysis and numerical simulation technology, applied in the field of signal analysis, can solve the problems of fuzzy pre-processing of signals, high frequency of occurrence, too generality, etc., to achieve obvious social benefits, increase the richness, and improve the effect of utilization efficiency.
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Embodiment 1
[0049]Such asFigure 1 ~ 5 As shown, a landslide disaster process is completed by the method of the invention.
[0050]figure 1 It is a schematic diagram of the landslide process analysis method. Medium and low frequency analysis in 0Hz ~ 5Hz.
[0051]1, original landslide seismic signal
[0052]In 2017, landslide events occurred in Sichuan, and the broadband seismographs of Sichuan Earthquake Network Earthquake Monitoring Station were monitored to the landslide event. The original landslide seismic signal of the second landslide event is extracted from the original seismic waveform signal recorded from the broadband seismometer (record 0.001Hz ~ 500 Hz frequency range). The original landslide seismic signal is about 150s, and the waveform diagram can be seen twice more pronounced amplitude peaks, and the second peak value is larger than the first peak.figure 2 It is the original landslide seismic signal.
[0053]2, extract signal a
[0054]The original landslide seismic signal is decomposed to obt...
Embodiment 2
[0074]Such asFigure 6 ~ 10 As shown, on the basis of the first example, numerical simulation reconstruction of this landslide disaster process is continued.
[0075]Figure 6 It is a schematic diagram of a landslide process numerical analog reconstruction method.
[0076]1. Calculate the power spectral density PSD of the signal B
[0077]For each stage of the landslide process, the signal power spectral density PSD of the signal B is calculated to obtain energy distribution at each stage.
[0078]In this example, the transition phase signal (28S ~ 68S) is analyzed as an example, and the frequency value of the landslide process transition phase signal in the signal B is substituted to the formula 1, and the transition phase is calculated from the power spectral density PSD characterization. Energy distribution.Figure 7 It is a transition phase power spectral density PSD diagram.
[0079]
[0080]In the formula, F represents the frequency, T indicates the time.
[0081]2, numerical simulation
[0082]PFC2D 5....
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