摘要
研究长期服役的石油钻机用井架实际承载力准确预测问题。井架作为石油钻机设备的关键部分,承载性能直接关系到整套钻机系统的安全运行,影响安全承载能力的预测精度。为了准确预测安全承载能力,建立一个准确而有效的基准模型,提出综合设计要求和实测数据,以反映结构性能参数的残差最小作为目标函数,推导了目标函数的改进形式,利用一阶搜索算法进行优化求解。并采用考虑弹塑性大位移分析的简化单元模式和计算方法,实现了有损伤在役井架承载性能非线性平衡路径的全过程跟踪。以某油田使用的在役井架为例进行分析,确定了井架的失稳状态、破坏形式及极限承载力,结果表明,方法可靠,可以为石油井架的承载力预测和安全评估提供了依据。
The accurate prediction of the actual ultimate bearing capacity of oil - derrick in - service was dis- cussed. As the key part of drilling equipment, the bearing capacity of derrick is close related to the safety of the op- erating drilling system. To evaluate the safety bearing capacity accurately, the baseline numerical model for the full range elastic - plastic analysis is very important. The optimal updating function was established according to residual equation between test and theory parameters. Combined with first - order optimization algorithm, the improved objec- tive function was deduced to solve this problem. Then a simplified element model and a relevant calculating method for an advanced large - displacement elastic - plastic analysis were proposed. The full range elastic - plastic analysis was achieved with arc - length method. Simulation analysis was carried out for the derrick in - service of an oilfield. The failure shape, dangerous position and ultimate bearing capacity can be obtained. The results indicate that this method can provide an effective way for the safety evaluation and state monitoring of oil - derrick with damage, and is suitable for practical engineering applications.
出处
《计算机仿真》
CSCD
北大核心
2013年第10期143-148,共6页
Computer Simulation
基金
中国石油天然气集团公司科技攻关项目(2011B-438)
黑龙江省研究生创新基金项目(YJSC2012-067HLJ)
关键词
石油井架
极限承载能力
弹塑性
双重非线性
基准仿真模型
0il derrick
Ultimate bearing capacity
Elastic- plastic
Double nonlinear
Baseline simulation model
作者简介
刘金梅（1975-），女（汉族），黑龙江人，博士，副教授，主要从事油气田地面工程方面的研究工作。
周国强（1952-），男（汉族），上海人，硕士，教授，主要从事石油装备检测和安全评定技术的研究工作。
郭金玉（1974-），男（汉族），黑龙江人，硕士，高级工程师，主要从事钻井技术方面的研究工作。
