【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。更多还原

【Abstract】 In this work,to study the overpressure distribution characteristics for multiple cloud explosion,we carried out a numerical simulation using LS-DYNA of the process of blast waves interaction for four non-circular cross-section clouds,with the computational results verified and compared with experimental data.Furthermore,based on our analysis of the peak overpressure located from 0mto20 min the vertical direction and the processes of blast-waves interaction in the central area,we obtained the variation of the overpressure close to the ground versus the horizontal distances in four directions including 0°,90°,135°and 180°.Our results show that three blast waves occur in sequence over the central ground area,and there exists an increasingly higher pressure towards the central area.In the 45°vertical section,blast waves consist of incident wave,reflection wave and Mach wave.更多还原