Blast walls are installed on the topside of offshore structures to reduce the damage from fire and explosion accidents. The blast walls on production platforms such as floating production storage, offloading, and floating production units undergo fire and explosion risk analysis, but information about blast walls on the well-test area of drillship topsides is insufficient even though well tests are performed 30 to 45 times per year. Moreover, current industrial practices of design method are used as simplified elastically design approaches. Therefore, this study investigates the strength characteristic of blast wall on drillship based on the blast load profile from fire and explosion risk analysis results, as well as the ability of the current design scantling of the blast wall to endure the blast pressure during the well test. The maximum plastic strain of the FE results occurs at the bottom connection between the vertical girder and the blast wall plate. Based on the results, several alternative design applications are suggested to reduce the fabrication cost of a blast wall such as differences of stiffened plated structure and corrugated panels, possibility of changing material (mild steel), and reduced plate thickness for application in current industrial practices.

中文翻译：

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钻井船试区现有爆破墙结构强度研究

爆炸墙安装在海上结构的顶部，以减少火灾和爆炸事故造成的损害。浮动生产存储，卸载和浮动生产单元等生产平台上的爆炸墙要经过火灾和爆炸风险分析，但是即使进行了30到45次井测试，钻井船顶部测试区域的爆炸墙信息仍然不足。每年的次数。此外，设计方法的当前工业实践被用作简化的弹性设计方法。因此，本研究基于火灾和爆炸风险分析结果中的爆炸载荷曲线，以及当前设计的爆炸壁在试井期间承受爆炸压力的能力，来研究钻井船上爆炸壁的强度特性。 。有限元分析结果的最大塑性应变出现在垂直大梁与爆破墙板之间的底部连接处。根据结果​​，提出了几种替代设计应用程序，以降低爆破墙的制造成本，例如加硬的镀层结构和波纹板的差异，更换材料（低碳钢）的可能性以及减小的板厚，以用于当前的工业实践中。 。