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

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 correspondin