深水水下分离器承压结构强度的可靠性  

Strength reliability of pressure bearing structure of deep-water separator

作　　者：张慎颜[1] 李秀美[1] 葛玖浩 陈国明[1] 

机构地区：[1]中国石油大学(华东)海洋油气装备与安全技术研究中心

出　　处：《油气储运》2017年第8期976-981,共6页Oil & Gas Storage and Transportation

基　　金：国家863计划资助项目"水下分离器关键技术研究";2013AA09A213;中央高校基本科研业务费专项资金资助项目"深水水下分离器承压结构强度可靠性分析";14CX06123A

摘　　要：深水水下分离器服役环境下的载荷工况复杂,服役寿命易受多种因素影响。为了确保深水水下分离器服役期间的安全可靠性,进一步研究不同材料水下分离器承压结构的强度可靠性与设计尺寸及加工材料性能之间的定量关系,采用蒙特卡罗法,以承压结构壁厚、材料屈服强度等参数为随机输入变量,建立了承压结构串联系统模型,并且通过外压试验验证了模型的准确性。通过模拟承压结构设计参数的随机性,得到承压结构的应力强度分布特征和各参数对结构强度可靠性的敏感性和灵敏度。算例分析表明:在2 000 m深水条件下,水下分离器承压结构的可靠度达到99.565 3%,筒体壁厚是影响承压结构可靠性的最主要因素,该研究结果可为深水水下分离器的优化设计提供必要的技术参考。The load condition is complicated where a deep-water separator is in service, so its service life is affected by various factors. In order to ensure the safety and reliability of deep-water separators in service, the quantitative relationships between the strength reliability of pressure bearing structure of deep-water separator made of different materials and the design size and material property were investigated further in this paper. By virtue of Monte Carlo method, the series system model of pressure bearing structure was established by taking the wall thickness of pressure bearing structure and the yield strength of material as the stochastic input variables. Then, its accuracy was verified by means of external pressure test. Finally, the stochasticity of design parameters of pressure bearing structure was simulated, and the stress intensity distribution characteristics of pressure bearing structure and the sensitivity and sensitiveness of each parameter to the structure strength reliability of pressure bearing structure were figured out. Case calculation shows that the reliability of pressure bearing structure of deep-water separator in the water of 2 000 m deep is 99.565 3 % and the wall thickness of cylinder is the most important factor affecting the reliability. The research results provide the necessary technological reference for the optimization design of deep-water separators.

关 键 词：水下分离器 承压结构 可靠性 串联系统模型 外压试验 蒙特卡罗法 

分 类 号：TE952[石油与天然气工程—石油机械设备]