Abstract Dome structures are often employed for industrial buildings and may be potential targets of terrorist attacks or accidental explosion. Military design manuals that are commonly used for structural design practice are based on the assumption that the blast wave reflects on an infinite or finite flat surface. These semi-empirical formulae ignore the blast wave propagation behaviour on a finite and variable-curvature reflector. The purpose of this research work is to estimate the blast load on dome structures during an external explosion. To achieve this objective, two laboratory-scale spherical dome structures were tested experimentally with 11 different blast cases. Following the experimental analysis, numerical parametric analysis based on ANSYS/AUTODYN was carried out to study the propagation and reflection on dome roofs. In addition, the performance of the Mach effect, reflection effect, diffraction effect, clearing effect and decay coefficient of the blast wave on the dome roof were investigated for different structural and explosion parameters. Based on this, a series of empirical equations are proposed to describe the temporal and spatial blast load distribution on a dome roof mounted on a supporting structure. This new load model described in the paper has been validated as it is able to predict the results of the experimental measurement on dome structures within experimental error.

中文翻译：

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半球形冲击波在穹顶上的传播行为

摘要 圆顶结构常用于工业建筑，可能成为恐怖袭击或意外爆炸的潜在目标。通常用于结构设计实践的军事设计手册基于冲击波在无限或有限平面上反射的假设。这些半经验公式忽略了有限和可变曲率反射器上的冲击波传播行为。这项研究工作的目的是估计外部爆炸期间圆顶结构上的爆炸载荷。为了实现这一目标，两个实验室规模的球形穹顶结构在 11 种不同的爆炸案例中进行了实验测试。在实验分析之后，基于 ANSYS/AUTODYN 进行数值参数分析，以研究圆顶屋顶的传播和反射。此外，研究了不同结构参数和爆炸参数下冲击波在穹顶上的马赫效应、反射效应、绕射效应、清扫效应和衰减系数等性能。在此基础上，提出了一系列经验方程来描述安装在支撑结构上的圆顶屋顶的时空爆炸载荷分布。论文中描述的这种新载荷模型已经过验证，因为它能够在实验误差范围内预测圆顶结构的实验测量结果。提出了一系列经验方程来描述安装在支撑结构上的穹顶上的时间和空间爆炸载荷分布。论文中描述的这种新载荷模型已经过验证，因为它能够在实验误差范围内预测圆顶结构的实验测量结果。提出了一系列经验方程来描述安装在支撑结构上的圆顶屋顶上的时间和空间爆炸载荷分布。论文中描述的这种新载荷模型已经过验证，因为它能够在实验误差范围内预测圆顶结构的实验测量结果。