油气爆炸作用下海洋平台抗冲结构研究

Research on anti-explosion structure of offshore platform subject to gas explosion load

海洋平台在服役期间,常会遭受到油气泄露而爆炸引起的冲击破坏。结合歧口QK18-2海洋平台结构,利用非线性瞬态动力学计算软件MSC.Dytran对气体爆炸造成海洋平台结构的损伤机理进行数值仿真研究。在此基础上,详细研究舱室在爆炸载荷下的动态响应,将舱室和爆炸区之间的围壁结构采用增加板厚和改变支撑结构形式、尺寸等四种不同的方式进行比较研究,得出支撑结构对于平台抗冲击的重要性,从而提出有效可行的抗冲结构形式。

The offshore platform is liable to suffer from the shock damage caused by explosion due to oil or gas leaking during its operation. Based on the structure of QK18-2 platform, by using the non-linear dynamic transient analysis calculation software MSC. Dytran, the paper pre- sents the numerical simulation of the damage caused by gas explosion to the offshore structure. And on the basis of the analysis on the structure of the platform, an in-depth study is made on the dynamic response of the compartment to the explosion load and on the distortion, stress, strain, and acceleration. Finally an effective and feasible strengthening proposal is made to provide an anti-explosion structure after comparing four different methods of increasing the thickness, changing the support structure, and re-adjusting the structural form and size.