Hydraulic collapse simulation device and control method based on energy similarity feedback

Abstract

This invention belongs to the field of geological disaster simulation and geotechnical mechanics experimental technology, and relates to a hydraulic collapse simulation device based on energy similarity feedback. The device includes a load-bearing box, a lifting box, a hydraulic cylinder, a hydraulic pressure sensor, a laser displacement sensor, a DIC system, an acoustic emission sensor array, and a control module. This invention uses thrust, instantaneous displacement, average strain rate, and damage energy to determine energy similarity indices. It then judges whether the energy similarity indices deviate from a preset energy similarity bandwidth. If they do, the stepping frequency of the hydraulic cylinder is dynamically adjusted until the energy similarity indices return to the preset energy similarity bandwidth range. This allows for the reproduction of the dynamic balance between energy input and release during ground collapse, maintaining quasi-static conditions at the model scale. Simultaneously, multi-parameter acquisition enables real-time quantification of key indicators such as crack geometric evolution and energy release rate, avoiding a disconnect between the loading and response processes.

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