Explicit dynamics ground stress initialization method and system, medium and computer equipment
An initialization method and dynamic technology, applied in computer equipment, medium, explicit dynamic in-situ stress initialization method, and system field, can solve problems such as time-consuming, result error, complicated and cumbersome parameter setting, etc., and achieve a simplified stress initialization method. , Simple operation, easy to set effect
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Embodiment 1
[0052] The present invention is based on the ground stress initialization method of AUTODYN platform, is characterized in that, comprises the following steps:
[0053] (1) Establish numerical models based on actual engineering problems
[0054] First, a simplified numerical model is established according to the actual underground engineering problems, such as the deep tunnel blasting model, etc., and then the corresponding dynamic mechanical parameters are assigned to the model according to the specific geographical environment, including rock density, volume model, dynamic shear modulus and Dynamic Poisson's ratio, etc.;
[0055] (2) Set specific boundary conditions for the numerical model
[0056] The present invention needs to set the transmission boundary condition on the numerical model to simulate the situation of infinite rock mass, and then set the corresponding constant stress boundary condition according to the needs, that is, the stress does not change with time; ...
Embodiment 2
[0060] (1) Establish a deep ground single hole blasting model
[0061] The single hole blasting problem in a deep blasting project is simplified as image 3 In the numerical model shown, its length and width are both 200mm, and the radius of the blast hole is 3.5mm. Considering the geological conditions of granite, the corresponding dynamic mechanical parameters are: the density is 2.66g / cm 3 , the bulk model is 25.59GPa, the dynamic shear modulus is 21.83GPa, and the Poisson's ratio is 0.169. The model is discretized into a total of 164,500 two-dimensional plane strain elements.
[0062] (2) Set specific boundary conditions for the numerical model
[0063] A transmission boundary condition is set around the single-hole blasting model to simulate the situation that the blasthole is in an infinite rock mass, and the constant stress boundary condition considered is the lateral initial pressure P x and vertical initial pressure P y Only 20MPa, such as image 3 shown.
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