Landslide process analysis method, process numerical reconstruction method, application

Abstract

The invention discloses a landslide process analysis method, a process numerical reconstruction method and applications. The method for analyzing the landslide disaster process of the invention is based on the original landslide ground motion signal, extracts the IMF principal component signal, performs time-frequency spectrum transformation, and divides the landslide process into five stages according to the frequency energy characteristics in different time periods in the landslide ground motion signal. This method extracts the transition stage of the landslide process for the first time. The invention provides the application of the landslide disaster process analysis method in the landslide disaster analysis, in the design of the landslide disaster emergency response plan, and in the mathematical modeling of the landslide event. The invention also provides a method for numerical simulation and reconstruction of the landslide process, which uses the energy data evolution of the landslide ground motion signal as the basis to perform the numerical simulation and reconstruction of the landslide process. And the application of reconstruction method in landslide disaster analysis and landslide disaster emergency response plan design. Each method improves the abundance of landslide disaster basic data and the effectiveness of disaster prevention and emergency response plans, and has significant social benefits.

Description

technical field [0001] The invention relates to a signal analysis technology, in particular to a technology for analyzing and numerically reconstructing a landslide disaster process by using ground motion signals, and its application, belonging to the technical fields of signal analysis and processing technology and geological disaster monitoring. Background technique [0002] Earthquake observatory networks all over the world monitor and obtain massive earthquake signals every day. The essence of the ground motion signal is the seismic waveform information generated by various natural and unnatural earthquake events, including the information generated by various geological disaster events. Earthquake signal public resources, and the sharing of global earthquake information has been preliminarily realized. Therefore, the use of ground motion signals to implement various technologies for geological disaster prevention and control can greatly save the monitoring cost of geol...

AI Technical Summary

Problems solved by technology

However, there are three obvious shortcomings in the implementation of this type of technology: First, as mentioned above, landslide disasters are both independent disasters and derivative disasters, so the frequency of occurrence is high and the location is uncertain

The main defects of this method are as follows: First, the landslide event is finally divided into "stationary-acceleration-deceleration-integral re-acceleration after front-end anti-tilt-stationary", which is too general compared with the actual landslide process and cannot be used. The purpose of numerical simulation to restore the disaster process; second, this method inverts the low-frequency landslide seismic signal to obtain the force-time function of the landslide source area, and performs classical mechanical analysis on this function to obtain the motion characteristics of the landslide body, but the signal is not affected during the inversion process. The previous processing is fuzzy, and there are errors in the force-time function completed on this basis; third, the method mainly focuses on the data of the slope of the slide bed, the direction of the landslide, and the displacement of the slide body obtained from seismic signal inversion, combined with the force-time function The final result of time function analysis, time-frequency analysis and on-site monitoring data is only to roughly restore the landslide process, and it is impossible to further introduce numerical models to complete the numerical reconstruction of the landslide process, so it cannot provide the possibility for more accurate landslide disaster research

At the same time, the article does not give the specific process of dividing the stages, and it cannot belong to the technical solution claimed in the patent.

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