When a high explosive detonates, a large amount of energy is released within a short time, creating a high-temperature and high-pressure environment accompanied by a blast wave. When the blast wave interacts with field obstacles such as building structures and ground soil, it produces a reflected wave. The complexity of the pressure field created by blast waves depends on the spatial characteristics of the explosion domain. To understand the blast wave characteristics in various environmental constraints, this study develops a large-scale hydrodynamic solver of shock wave propagation in complex spatial domains of two kinds. First, the propagation of a blast wave in large open spaces (20 m × 10 m area) was simulated using an adaptive mesh refinement technique programmed to capture the details of moving blast waves and multiple reflections. Second, a point source explosion in a two-room concrete structure (5 m × 7 m × 3 m) was simulated which makes use of the optimal merging of two equations of state, while a spherical detonation wave is stabilized before spreading into multiple rooms. The experimental data in both tests are used to validate the computational results presented.

中文翻译：

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在模拟和实验中了解爆炸载荷对开放空间和封闭结构的影响

烈性炸药引爆时，会在短时间内释放出大量能量，形成高温高压环境，伴随着冲击波。当冲击波与建筑结构和地面土壤等现场障碍物相互作用时，它会产生反射波。冲击波产生的压力场的复杂性取决于爆炸域的空间特征。为了了解各种环境约束下的冲击波特性，本研究开发了两种复杂空间域中冲击波传播的大规模流体动力学求解器。首先，使用自适应网格细化技术模拟爆炸波在大型开放空间（20 m × 10 m 区域）中的传播，该技术编程以捕获移动爆炸波和多次反射的细节。第二，模拟了两室混凝土结构（5 m × 7 m × 3 m）中的点源爆炸，该结构利用两个状态方程的最佳合并，同时球形爆震波在扩散到多个房间之前稳定。两个测试中的实验数据都用于验证所呈现的计算结果。