摘要
为确保海上钻井作业的安全运行,以试验和数值模拟相结合的方法研究钻机底座的安全承载能力.以某海洋钻机底座为研究对象,采用有限元方法,建立了底座不同井位时的三维数值模型.对其中一个井位作业时的底座进行现场试验和有限元分析.当数值模拟和工程实测结果存在差异时,一方面底座各杆件的基本尺寸以实际测绘数据为基准来校正模型,另一方面以实测应力来局部修正有限元模型,从而推演到设计工况下不同井位作业时的承载能力预测.结果表明:以试验和数值模拟相结合的方法可以比较真实地模拟出底座在不同井位作业时的结构力学性态,确定底座的薄弱井位、结构的薄弱部位以及安全承载能力,为现场实际操作提供有价值的建议,具有一定的实用价值,适合工程应用.
To ensure the safety of offshore drilling operation,an integration of testing and numerical simulation is employed for safe loading capacity of offshore rig substructures.By using a specific offshore rig substructure as an example,a3 D model is first established for different well locations.Then,the onsite testing and finite element analysis are conducted on one of well location operations.When the differences between numerical simulation and practical testing results exist,the model is rectified based on the surveying data from basic dimensions of substructure bars.Meanwhile,the finite element model is revised using the tested stresses.Next,the loading capacity is predicted on different well location operations under design working conditions.Finally,it is detected that the proposed method effectively simulates the structural dynamics properties of different well location operations.In addition,the weak well location,weak structural component and safe loading capacity can be identified.Therein,this approach provides a valuable recommendation on practical operation.
出处
《中国工程机械学报》
北大核心
2015年第4期367-371,共5页
Chinese Journal of Construction Machinery
基金
黑龙江省教育厅科学技术研究项目资助(12541057)
关键词
海洋钻机
底座
承载能力
数值模拟
offshore rig
substructure
loading capacity
numerical simulation
