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Effects of structural congestion and surrounding obstacles on the overpressure loads in explosions: experiment and CFD simulations

机译:结构拥挤和周围障碍物对爆炸中超压载荷的影响:实验和CFD模拟

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摘要

An experimental and numerical study was undertaken to identify the characteristics of overpressure loads in offshore platform models subject to hydrocarbon explosions, with a focus on the structural congestion and surrounding obstacles. A large-scale (one-half) test model of a FLNG (liquefied natural gas floating production storage and offloading unit) topside structure was used for the experiment. Computational fluid dynamics (CFD) were used to calculate the overpressure loads in explosions with varying degrees of structural congestion. The overpressure loads tended to be more significant with the increase in structural congestion because the ventilation of exploded gas was retarded due to the obstacles presented by congested structural elements. Also, the overpressure loads with the surrounding structures are much larger than those without them. Details about the test database are documented to provide a useful reference for other researchers to validate numerical and theoretical methods.
机译:进行了一项实验和数值研究,以识别遭受碳氢化合物爆炸的海上平台模型中的超压载荷的特征,重点是结构性拥堵和周围的障碍物。实验使用FLNG(液化天然气浮动产品存储和卸载单元)顶部结构的大型(一半)测试模型。计算流体动力学(CFD)用于计算结构拥挤程度不同的爆炸中的超压载荷。随着结构拥堵的增加,超压负荷趋向于更为显着,这是因为由于拥挤的结构元件所带来的障碍,爆炸气体的通风受到了阻碍。而且,周围结构的超压载荷比没有周围结构的超压载荷大得多。有关测试数据库的详细信息已记录在案,为其他研究人员验证数值和理论方法提供了有用的参考。

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