Differential pressure response simulation method and system for interface of strongly hydrated confined layered minerals

Abstract

The application discloses a differential pressure response simulation method and system for a strong hydration limited layered mineral interface and belongs to the technical field of limited hydration structure analysis. The differential pressure response simulation method for the strong hydration limited layered mineral interface comprises the following steps: a strong hydration limited solid-liquid-solid interface system is constructed and pretreated to obtain an initial stable interface structure; the interface piston layer and the fixed skeleton layer are identified according to the spatial distribution of the mineral sheet layer in the normal direction; a local equivalent pressure background between layers is established based on the initial stable interface structure, an engineering disturbance pressure is introduced, and a differential pressure response system is constructed; a local normal additional force is applied to the interface piston layer to realize local interface normal loading and perform stability control; layer structure response parameters are extracted for analysis; and a two-way convergence verification is performed to confirm that the equilibrium state is a true stable equilibrium state. The application can truly reflect the local stress state of the strong hydration limited interface, and avoids the non-physical compression and numerical instability problems caused by traditional overall NPT loading.

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