海洋工程装备与技术 ›› 2014, Vol. 1 ›› Issue (1): 3-13.

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典型张力腿平台整体结构强度分析方法研究

李阳, 时忠民, 谢彬, 谢文会   

  1. 中海油研究总院, 北京 100027
  • 收稿日期:2014-01-22 出版日期:2014-01-30 发布日期:2017-08-12
  • 作者简介:

    作者简介: 李阳(1984--), 男, 硕士, 工程师, 主要从事深水浮式平台结构及水动力分析方面的研究.

  • 基金资助:
    国家科技重大专项(2011ZX05026-002)

Global Structural Strength Analysis Methodology of a Typical TLP

Yang LI, Zhong-min SHI, Bin XIE, Wen-hui XIE   

  1. CNOOC Research Institute, Beijing 100027, China
  • Received:2014-01-22 Online:2014-01-30 Published:2017-08-12

摘要:

重点针对一种典型张力腿平台(TLP)进行了整体结构强度分析研究, 以验证平台结构完整性设计的环境能够抵御恶劣海况的冲击.首先, 建立了一种典型张力腿平台的整体有限元模型, 平台主体结构按实际设计建立, 上甲板结构通过甲板及梁模型对应简化.通过对操作和极端条件下载荷分析, 得到平台危险波浪工况下载荷设计波参数.随后, 将波浪载荷映射到整体结构的有限元模型, 将张力腿上端位置建模简化为弹簧单元来反映包括旋转在内的6个自由度.最后, 通过结构有限元计算软件得到结构在各危险工况下的最大等效应力及应力分布趋势, 其中针对35个控制单元组, 得到对应每种单元组的波浪的浪向及相位.分析结果及张力腿平台整体结构强度分析方法可供其他海洋平台强度分析参考.

关键词: 张力腿平台, 整体结构强度评估, 极端工况, 有限元模型, 浪向

Abstract:

We focus on the global structure strength analysis of a typical tension leg platform (TLP). The objective of the TLP global structural analysis is to check the hull global structural integrity under design environmental conditions. Firstly, a global finite element model of the entire TLP is established, the hull structure is modeled in detail, whilst the deck structure is represented through a simplified deck beam model. A hydrodynamic analysis for operation and extreme conditions is conducted to get the design wave parameters for critical wave loads. After that, wave loads are mapped to the global structure finite element model, and the tendons are modeled as spring element which represents 6 degrees of freedom and rotations. Finally, the maximum stress and its distribution trends, together with the control elements, are obtained by finite element analysis according to critical wave heading, wave periods, wave heights and wave positions. Results and the TLP analysis method proposed can be used as reference for strength analysis of other offshore platforms.

Key words: tension leg platform, global structural strength analysis, extreme conditions, finite element model, wave heading

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