缓波型柔性立管构型优化及敏感性分析
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摘要
针对缓波型柔性立管存在的波型较陡和浮子段张力较大的问题,对其进行优化,将单波构型优化为双波构型,运用集中质量法对改进前后的2种结构形式进行分析,确认双波构型在静力和动力响应下的张力及弯曲特性更优。在此基础上,对双波型柔性立管进行敏感性分析。在静力状态下,悬挂点和第2段浮子段末端对浮子段间隔和浮子段长度敏感;在动力响应下,悬挂段到第1段浮子段的张力变化和最小弯曲半径对浮子段间隔和大悬挂角非常敏感。研究得到的敏感性参数结论可作为缓波型柔性立管总体布置设计的参考。为提升缓波型柔性立管的性能,可合理增加浮子段与浮子段的间隔和悬挂角,但同时要满足规范的要求,避免关键部位动力响应过大。
In order to solve the problem of the steep wave type and large tension in the float segment of the lazy wave type flexible riser, the single-wave configuration is optimized to a double-wave configuration, and the lumped mass method was used to analyze the improvement before and after confirmation. Lumped mass method is used to analyze the two configurations before and after the improvement, and it is confirmed that the double-wave configuration has better tension and bending properties under static tension distribution and dynamic response.On this basis, the sensitivity analysis of the double-wave type flexible riser is performed. In the static state, the top hanging point and the end of the second section of the float section are sensitive to the float section interval and float section length. In the dynamic response, the tension change and the minimum bending radius of the hanging segment to the first section of the float section are very sensitive to the float section interval and large hanging angle.The sensitive parameter conclusions obtained can be used as a reference for the design of the overall arrangement of the lazy wave type flexible riser. In order to improve the performance of the lazy rise type flexible riser, the float section interval and the hanging angle can be reasonably increased, and at the same time,the specification requirements must be met. Excessive dynamic response in key areas should be avoided.
In order to solve the problem of the steep wave type and large tension in the float segment of the lazy wave type flexible riser, the single-wave configuration is optimized to a double-wave configuration, and the lumped mass method was used to analyze the improvement before and after confirmation. Lumped mass method is used to analyze the two configurations before and after the improvement, and it is confirmed that the double-wave configuration has better tension and bending properties under static tension distribution and dynamic response.On this basis, the sensitivity analysis of the double-wave type flexible riser is performed. In the static state, the top hanging point and the end of the second section of the float section are sensitive to the float section interval and float section length. In the dynamic response, the tension change and the minimum bending radius of the hanging segment to the first section of the float section are very sensitive to the float section interval and large hanging angle.The sensitive parameter conclusions obtained can be used as a reference for the design of the overall arrangement of the lazy wave type flexible riser. In order to improve the performance of the lazy rise type flexible riser, the float section interval and the hanging angle can be reasonably increased, and at the same time,the specification requirements must be met. Excessive dynamic response in key areas should be avoided.
引文
[1]DNV Offshore Riser Systems:DNV-OSS-302[S].2003
[2]陈加菁,王安姣.柔性立管的非线性动力分析[J].海洋工程,1991,9(3):12-22.
[3]GIESE K.Development of Flexible Riser for Floating Offshore Production[C]//OTC5469,Offshore Technology Conference.1987.
[4]孙丽萍,周佳,王佳琦.深水柔性立管的缓波型布置及敏感性分析[J].中国海洋平台,2011,26(3):37-42.
[5]RUAN W D BAI Y,CHENG P.Static Analysis of Deepwater Lazy-Wave Umbilical on Elastic Seabed[J].Ocean Engineering,2014,91(4):73-83.
[6]API RP 17B.Recommended Practice For Flexible Pipe[S].2002.
[7]宋磊建.缓波形柔性立管总体响应特性研究及疲劳分析[D].上海:上海交通大学,2013.
[8]丁鹏龙,李英,刘志龙.柔性立管的非线性动力分析[J].海洋工程,1991,9(3):12-22.
[2]陈加菁,王安姣.柔性立管的非线性动力分析[J].海洋工程,1991,9(3):12-22.
[3]GIESE K.Development of Flexible Riser for Floating Offshore Production[C]//OTC5469,Offshore Technology Conference.1987.
[4]孙丽萍,周佳,王佳琦.深水柔性立管的缓波型布置及敏感性分析[J].中国海洋平台,2011,26(3):37-42.
[5]RUAN W D BAI Y,CHENG P.Static Analysis of Deepwater Lazy-Wave Umbilical on Elastic Seabed[J].Ocean Engineering,2014,91(4):73-83.
[6]API RP 17B.Recommended Practice For Flexible Pipe[S].2002.
[7]宋磊建.缓波形柔性立管总体响应特性研究及疲劳分析[D].上海:上海交通大学,2013.
[8]丁鹏龙,李英,刘志龙.柔性立管的非线性动力分析[J].海洋工程,1991,9(3):12-22.