As the offshore life and production base,the offshore platform plays an important role in offshore oil exploitation.The acoustic emission(AE)technology can be applied to damage detection and early warning of the offsh...As the offshore life and production base,the offshore platform plays an important role in offshore oil exploitation.The acoustic emission(AE)technology can be applied to damage detection and early warning of the offshore platform,and then can effectively guarantee the safe operation of the offshore platform,prevent accidents and casualties.The steel jacket offshore platform is currently the most widely used in shallow sea oil field of our country.Considering the complex structure of the steel jacket offshore platform and using AE technology,this paper has carried on research on effects of the pipe diameter size,the welding angle on the AE signal propagation characteristics,and at the same time,influence of the marine environment(seawater temperature,salinity)on the AE testing.These research contents have very important reference value for the application of the AE technology in offshore platform monitoring.展开更多
为研究导管架平台井口区天然气泄漏引发的喷射火灾对平台结构、设备及人员安全性的影响,对比防火墙和被动防火材料(Passive Fire Protection,PFP)的保护效果,采用计算流体软件开展了不同泄漏速率下可燃气云燃烧发展过程的模拟,得到平台...为研究导管架平台井口区天然气泄漏引发的喷射火灾对平台结构、设备及人员安全性的影响,对比防火墙和被动防火材料(Passive Fire Protection,PFP)的保护效果,采用计算流体软件开展了不同泄漏速率下可燃气云燃烧发展过程的模拟,得到平台着火区域附近支撑结构及周边设备的热通量时空变化特征,进而基于热通量评价准则,对平台结构、设备、人员及防火措施的效果进行安全评价。结果表明:不同泄漏速率下,井口区火灾发展与蔓延趋势不同,小泄漏火灾主要影响平台中层甲板井口区;中等泄漏火灾对平台中层甲板的影响范围最大,人员逃生最为不利;高泄漏时则主要影响平台中层甲板北侧区域,但会对上层甲板的模块安全性造成威胁。泄漏速率越大,火焰覆盖区的平台主支撑及设备的稳态热通量越大,破坏时间越短。在相同的火灾场景下,防火墙能够比PFP对设备起到更好的安全防护效果。展开更多
基金financially supported by the National Natural Science Foundation of China (No.50875016)
文摘As the offshore life and production base,the offshore platform plays an important role in offshore oil exploitation.The acoustic emission(AE)technology can be applied to damage detection and early warning of the offshore platform,and then can effectively guarantee the safe operation of the offshore platform,prevent accidents and casualties.The steel jacket offshore platform is currently the most widely used in shallow sea oil field of our country.Considering the complex structure of the steel jacket offshore platform and using AE technology,this paper has carried on research on effects of the pipe diameter size,the welding angle on the AE signal propagation characteristics,and at the same time,influence of the marine environment(seawater temperature,salinity)on the AE testing.These research contents have very important reference value for the application of the AE technology in offshore platform monitoring.
文摘为研究导管架平台井口区天然气泄漏引发的喷射火灾对平台结构、设备及人员安全性的影响,对比防火墙和被动防火材料(Passive Fire Protection,PFP)的保护效果,采用计算流体软件开展了不同泄漏速率下可燃气云燃烧发展过程的模拟,得到平台着火区域附近支撑结构及周边设备的热通量时空变化特征,进而基于热通量评价准则,对平台结构、设备、人员及防火措施的效果进行安全评价。结果表明:不同泄漏速率下,井口区火灾发展与蔓延趋势不同,小泄漏火灾主要影响平台中层甲板井口区;中等泄漏火灾对平台中层甲板的影响范围最大,人员逃生最为不利;高泄漏时则主要影响平台中层甲板北侧区域,但会对上层甲板的模块安全性造成威胁。泄漏速率越大,火焰覆盖区的平台主支撑及设备的稳态热通量越大,破坏时间越短。在相同的火灾场景下,防火墙能够比PFP对设备起到更好的安全防护效果。
