为研究爆炸条件下土中应力波的时空分布，基于黄土中接触爆炸和半埋爆炸试验，验证了ANSYS/AUTODYN软件建立的计算模型，并在此基础上开展了土中爆炸地冲击效应研究。结果表明：随着土介质深度的增加，感生地冲击峰值减小，而直接地冲击峰值增大，最终压力和竖向应力时程曲线中的两个峰值减少为一个峰值，据此特征可将土中应力波场分为三个区域——地表区、近地表区和中心区；当装药比例埋深为-0.05~0.075 m/kg1/3时，随着装药比例埋深的增加，中心区迅速增大，地表区迅速减小，近地表逐渐增大；当装药比例埋深为0.1~0.4 m/kg1/3时，地冲击作用区的分布趋于稳定；爆炸耦合进入空气和土介质中的动能受炸药类型影响，但在一定范围内，地冲击作用区角度与地面空气冲击波超压冲量和直接地冲击应力冲量之比呈线性相关关系。
In order to investigate the temporal and spatial distribution of the stress wave in the soil produced by buried explosion, ANSYS/AUTODYN were used to model and simulation analysis, and a study on the ground shock effect of explosion in soil was carried out. The numerical model was valid through the test data, which were measured by the contact explosion and semi-buried explosion test in loess. The results show that as the depth of the soil medium increases, the peak of induced ground shock decreases, while the peak of direct ground shock increases. Finally, the two peaks of the time travel curves decrease to one peak. According to the characteristics of the pressure and vertical stress at various depths, the stress wave field in soil can be divided into three subzones, i.e. surface subzone, near-surface subzone and central subzone. With the increase of the scaled buried depth of charge, the central subzone rapidly increases, the surface subzone rapidly decreases, and the near-surface subzone gradually increases from zero, when the scaled buried depth of charge are -0.05~0.075 m/kg1/3. The distribution of ground shock subzones tend to be stable, when the scaled buried depth of charge are 0.1~0.4 m/kg1/3. The energy of explosive coupling into the air and soil medium is affected by the type of explosive. In certain extent, the angles of the ground shock subzones are linearly related to the ratio of the air-blast overpressure impulse to the impulse of the direct ground shock stress.