【摘要】 海拔高度会引起空气密度及气压的变化，直接影响冲击波压力在空气介质中的传播分布规律。该项研究采用AUTODYN建立了0、1 000、2 000、3 000、4 500 m等5种海拔高度下爆炸冲击波压力传播规律的有限元数值仿真模型，开展了等效TNT当量为10、30、50 kg工况下的数值仿真分析，并对获取的冲击波压力分布规律进行了分析。分析结果表明：海拔高度对冲击波压力具有显著的影响作用，具体表现为在同一等效TNT当量下，随海拔高度的增加，冲击波超压峰值、比冲量都逐渐减小，峰值到达时刻随测点距离增大逐渐提前；并且随等效TNT当量的增加，爆炸冲击波压力峰值和比冲量都逐渐增大，峰值到达时间逐步提前。数值仿真结果与试验结果具有较高的吻合度，该项研究揭示了海拔高度对爆炸冲击波传播分布规律的影响作用，为实际工程测试提供了理论支撑。更多还原

【Abstract】 Altitude causes changes in air density and pressure, directly affecting the propagation pattern of shock wave pressure in the air medium. The study used AUTODYN to establish a numerical simulation model for propagating blast wave pressure at altitudes of 0, 1 000, 2 000, 3 000, and 4 500 m. It performed numerical simulations for equivalent TNT equivalent conditions of 10, 30, and 50 kg. The analysis results show that altitude affects the pressure distribution of the shock wave. The results show that the altitude significantly affects the shock wave pressure, which is reflected in the fact that under the exact equivalent TNT equivalent, with the increase of altitude, the peak shock wave overpressure and specific impulse gradually decrease. The peak arrival time gradually advances with the increase of the distance of the measurement point. With the equivalent TNT equivalent increase, the peak blast shock wave pressure and specific impulse gradually increase, and the peak arrival time gradually. The numerical simulation results are in good agreement with the test results. This study reveals the effect of altitude on the distribution of blast wave propagation and provides adequate theoretical support for practical engineering tests.更多还原