A method and system for simulating rock dynamic response of plateau frozen rock

Abstract

The present application relates to the technical fields of modeling and adaptive correction of highland frozen rock dynamic response, and discloses a rock dynamic response simulation method and system for highland frozen rock, which is used to solve the deviation problem caused by directly extrapolating normal temperature continuous medium parameters to highland frozen rock engineering, and the method comprises the following steps: step one, constructing a digital rock model with real mesostructure through in-situ monitoring and CT scanning; step two, quantifying the dependence of frozen rock mechanical behavior on temperature and strain rate through systematic tests under multiple temperatures, multiple water contents and combined dynamic and static loads, and establishing a dynamic parameter database; step three, constructing a sequential thermal-mechanical coupling numerical model, dynamically updating the element material properties according to the instantaneous temperature, water content and strain rate state, and realizing high-fidelity simulation; step four, comparing the field monitoring data with the simulation results, starting the parameter optimization process based on the proxy model and inversion algorithm, and updating the verified and effective optimization results to the database to form a self-evolution closed loop.

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