摘要
针对深水钻井隔水管快速连接接头在复杂环境载荷作用下容易发生强度破坏的问题,采用ANSYS软件建立了双卡簧式快速连接接头有限元计算模型,并结合隔水管在波流耦合作用下的整体瞬态动力响应结果对其进行强度分析,研究了接头结构参数对其强度的影响规律。分析结果表明,隔水管快速连接接头最大应力出现在外接头和上卡簧接触的下部位置,最大应力可达255 MPa,满足结构强度要求;双卡簧受力情况为上卡簧受力比下卡簧普遍要大,另外,双卡簧在顶部和右下角处容易产生较明显的应力集中现象。左端面倾角、右端面倾角和倒角半径对隔水管接头最大应力的影响非常显著。考虑到实际情况,接头左、右端面倾角最优值分别为50°和15°,而其倒角半径的最优值为2 mm。该分析结果可为深水钻井隔水管快速接头的设计提供参考。
Deepwater drilling riser quick coupling is prone to suffering strength failure under complex environmental loads. The finite element model for double-clamp spring quick coupling is established by using ANSYS soft- ware. Strength analysis is carried out for the quick coupling based on the results of instantaneous dynamic response for the riser under wave current coupling effect. This paper focuses on the influencing rule of structural parameters on the coupling strength. The analysis results show that maximum stress of the quick coupling occurs in the lower position of contact between external coupling and the upper clamp spring, which can be up to 255 MPa and meet structure strength requirements; in addition, double clamp springs easily cause significant stress concentration on the top and in the lower right corner. Left end face inclination, right end face inclination and fillet radius play a very significant effect on maximum stress of the riser coupling. Based on actual conditions, the optimal value is 50° and 15°respectively for left and right end face inclination while the optimal value is 2 mm for fillet radius of the coupling.
出处
《石油机械》
2015年第4期59-63,共5页
China Petroleum Machinery
基金
国家973计划项目"深海柔性结构的非线性流固耦合振动与破坏机理"(2011CB013702)
关键词
深水
钻井隔水管
连接接头
结构参数
耦合作用
有限元
deepwater
drilling riser
coupling
structural parameters
coupling action
finite element
