天然气井喷爆炸下深水平台钻台区响应分析

Response of the Drill Floor Equipment on Deepwater Platform to the Explosion after the Natural Gas Blowout

针对天然气井喷爆炸后爆炸冲击波直接作用对象——钻台装备,采用TNT当量法及多物质耦合模型开展结构位移响应、超压响应及爆炸能吸收大小研究。研究结果表明,司钻房前舱壁钢板及玻璃中部偏左侧、就地工具房及就地电房前舱壁钢板中部为最大变形位置;钻台结构迎爆面连接部位较易发生破坏;司钻房后舱壁钢板比前舱壁钢板吸收更多塑性能,破坏更严重,且集中在连接部位;司钻房后舱壁连接部位等薄弱环节、结构最大变形位置为防爆设计重点考虑对象,可对其采取强化措施以达到优化防爆的目的。

The TNT equivalent method and multi-material coupled model are used to study the structural dis- placement response, overpressure response and explosion energy absorption of drill floor equipment-the direct ob- jects of the explosive blast of the natural gas blowout explosion. The results show that the maximum deformations oc- cur on the front bulkhead plate and central left glass of driller room, onsite tool house and the central front bulk- head plate of the electrical room. The connection part of the explosion side of the drill floor structure is prone to damage. The plastic energy absorbed by the back bulkhead plate of the driller room are greater than the front bulk- head plate, which results in more, serious damage and concentrated in connection areas. The weak points like the connection areas of the back bulkhead plate of the driller room and the maximum deformation position of the struc- ture are the critical targets of anti-explosion design. Strengthening measures should be taken to optimize the anti-ex- plosion design.