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含能材料  2015 

非圆截面云雾爆炸超压场数值模拟

DOI: 10.11943/j.issn.1006-9941.2015.05.015

Keywords: 非圆截面 超压 起爆高度 云雾爆炸 数值模拟

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Abstract:

为研究非圆截面云雾爆炸超压场的分布特性, 用LS-DYNA程序对云雾爆炸超压过程进行了数值模拟, 将数值模拟超压值与试验超压结果进行了对比, 得到了0°、90°、135°和180°共4个方向的峰值超压随距离的变化规律, 以及不同起爆高度对超压场分布的影响。结果表明, 试验中起爆云雾呈椭球形爆轰火球。4个方向在距离爆炸中心5 m处的峰值超压为2.9~5.2 MPa。在距离爆炸中心5~50 m范围内, 地面冲击波轨迹呈椭圆形。冲击波在90°方向的传播速率最小。当起爆高度由0.5 m增加至2.5 m时, 5~15 m范围内的地面峰值超压平均提高了8%

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