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Stress verification of a TLP under extreme wave environment

极端环境条件下TLP平台的应力校核

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Abstract

Stress response of a tension leg platform (TLP) in extreme environments was investigated in this paper. A location on one of the gussets was selected as the object point, where directional stresses were numerically simulated and also experimentally verified by a strain gage. Environmental loading and the platform’s structural strength were analyzed in accordance with industrial standards, utilizing linear wave theory and the finite element method (FEM). The fast Fourier transform technique was used to calculate the stress response amplitude operators (RAO) from the records of measurements. A comparison was performed between the stress RAO of the numerical simulation and that of the actual measurements. The results indicated that the stress RAO of the numerical simulation fitted well with measured data at specified wave headings with different periods.

摘 要

计算校核了某TLP平台垂向肘板在极端环境条件下的应力响应。 该垂向肘板为TLP立柱与张力支撑系统(TSS)间的连接件, 是TLP平台强度评估的关键部位。 根据通用的业界标准, 平台的环境载荷计算采用三维线性理论, 结构分析使用有限元方法。 应力数值计算与处理与实测应变片的位置和方向完全一致。 平台在位监测的数据使用FFT技术进行了处理, 得到了不同时段统计下各浪向的应力谱密度(RAO)。 数值计算与平台在位实测对比表明, 数值模拟的应力谱密度与实测数据吻合较好, 业界的分析方法可以在极端条件下对TLP的关键部位进行有效的强度分析。

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Authors and Affiliations

  1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, China

    Fa-suo Yan  (闫发锁), Da-gang Zhang  (张大刚), Li-ping Sun  (孙丽萍) & Yang-shan Dai  (戴仰山)

Authors
  1. Fa-suo Yan  (闫发锁)
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  2. Da-gang Zhang  (张大刚)
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  3. Li-ping Sun  (孙丽萍)
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  4. Yang-shan Dai  (戴仰山)
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Corresponding author

Correspondence to Fa-suo Yan  (闫发锁).

Additional information

Foundation item: supported by the Fund of “111 Project” (Grant No.B07019) from the State Administration of Foreign Experts Affairs and the Ministry of Education of China.

YAN Fa-Suo was born in 1977. He is a lecturer at Harbin Engineering University. His current research interests include offshore floating structures’ wave loads and structural analysis, etc.

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Yan, Fs., Zhang, Dg., Sun, Lp. et al. Stress verification of a TLP under extreme wave environment. J. Marine. Sci. Appl. 8, 132–136 (2009). https://doi.org/10.1007/s11804-009-8105-1

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  • DOI: https://doi.org/10.1007/s11804-009-8105-1

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