Construction method of numerical simulation of fluid-solid coupling in hydraulic fracturing
A fluid-solid coupling and hydraulic fracturing technology, which is applied in CAD numerical modeling, electrical digital data processing, and special data processing applications. Achieve the effect of easy promotion and application
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[0030] as attached figure 1 As shown, the present invention provides a method for constructing numerical simulation of fluid-solid coupling problems in hydraulic fracturing, comprising the following steps:
[0031] 1) Determine the model parameters and enter the program according to actual engineering problems; the present invention adopts the fracture zone model (ZdeněkP. B.H.Oh.Crack band theory for fracture of concrete[J].Materials&Structures,1983,16(3):155-177.)
[0032] 2) According to the stress balance equation In the time domain, the explicit central difference method is used to iteratively solve, that is In the formula, ρ is the solid density, is the acceleration, α is the damping coefficient, is the velocity, σ is the stress tensor, f is the physical force, u is the displacement, i is the number of iteration steps, and Δt is the time step. Solve solids problems with explicit algorithms, including nodal accelerations node speed Node displac...
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