多点云雾爆炸波相互作用的数值模拟

发布时间：2018-05-04 03:46

本文选题：爆炸力学 + 峰值超压　；参考：《爆炸与冲击》2016年01期

【摘要】：为研究多点云雾爆炸超压场的分布特性,利用LS-DYNA程序,对4个非圆柱体云雾的爆炸超压的相互作用过程进行了数值模拟,并与实验结果进行了对比。得到了中心区域冲击波相互作用演化过程与中心竖直方向0~20m处的超压变化规律,以及0°、90°、135°和180°等4个方向的地面峰值超压随水平距离变化的规律。结果表明:中心区域地面依次出现3重冲击波;地面整体超压场强度向中心区域倾斜。在45°方向竖直截面上冲击波波系由入射波、反射波与马赫波构成。
[Abstract]:In order to study the distribution characteristics of the overpressure field of multi point cloud explosion, the interaction process of explosion overpressure of 4 non cylindrical clouds was simulated by using the LS-DYNA program, and compared with the experimental results. The evolution of the impact wave interaction in the central region and the overpressure in the vertical direction of the center of the center of 0~20m were obtained. The ground peak overpressure changes with the horizontal distance in 4 directions, such as 0 degrees, 90 degrees, 135 degrees and 180 degrees. The results show that the ground surface has 3 heavy shock waves in turn, and the overall overpressure field strength of the ground is inclined to the central region. The impact wave system is composed of the incoming wave, the reflected wave and Maher wave on the vertical section of the 45 degree direction.

【作者单位】：北京理工大学爆炸科学与技术国家重点实验室;
【基金】：国家自然科学基金项目(11372044)
【分类号】：O383.3

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