复杂结构内爆炸冲击波传播的大规模计算方法研究

In order to study the propagation process and attenuation law of explosion shock wave in complex underground confined space such as mine tunnel, a block continuation calculation method based on data flow was proposed. This method solved the problem of huge waste of computational resources and realized large-scale, high-efficiency and high-precision numerical simulation of shock wave propagation in large-size complex underground confined spaces. The numerical results of the implosion process in the square trench were basically consistent with the experimental results, which proved the accuracy of the calculation method. The error between the full-scale calculation of the standard model case and the block continuation numerical simulation was within 0.33%, and the continuation method saved 88.68% of the computational core time compared with the ordinary full-scale calculation for a given case, which proved that the method not only ensured the accuracy of the calculation process, but also greatly improved the computational efficiency. At the same time, the explosion of a large complex structure containing a rectangular room and a cylindrical bifurcated pressure relief cavity was numerically simulated. Simulation results show that: shock wave overpressure in the pressure relief cavity decreased gradually with a trend of fluctuating decline, and its decay rate was smaller than that in the free field; T-shaped manifold with right-angle intersection between pipes or reduced diameter of the pipe was to a certain extent conducive to the attenuation of shock wave overpressure. Numerical simulation results show that the data flow-based block continuation calculation method can be used for theoretical guidance of explosion-proof and blast-resistant design of large scale complex structures such as underground spaces.