上海交通大学学报

上海交通大学学报（自然版）

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海洋内孤立波中张力腿平台的水动力特性

尤云祥1，李巍1，时忠民2，曲衍2，肖越2

  

  1. (1.上海交通大学 海洋工程国家重点实验室， 上海 200240；2.中海石油（中国）有限公司北京研究中心， 北京 100027)
  • 收稿日期:2009-04-20 修回日期:1900-01-01 出版日期:2010-01-29 发布日期:2010-01-29

Hydrodynamic Characteristics of Tension Leg Platforms in Ocean Internal Solitary Waves

YOU Yunxiang1,LI Wei1,SHI Zhongmin2,QU Yan2,XIAO Yue2

  

  1. (1. State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. China National Offshore Oil Corperation Research Center, Beijing 100027, China）
  • Received:2009-04-20 Revised:1900-01-01 Online:2010-01-29 Published:2010-01-29

摘要：

基于内孤立波mKdV理论，采用时域有限位移运动方程，结合改进的Morison公式研究了两层流体中内孤立波与张力腿平台(TLP)的相互作用，针对东沙群岛南部海域附近某实测内孤立波特征参数，计算并分析了国际船舶结构力学会议提供的张力腿平台(ISSCTLP)的内孤立波冲击载荷与运动响应，以及张力腿的张力变化特性.结果表明，内孤立波将对张力腿平台产生突发性的冲击载荷以及大幅度水平漂移运动，并使得张力腿的张力显著增大.

关键词: 两层流体, 内孤立波, 张力腿平台, 运动响应, 载荷

Abstract: Based on the mKdV theory of internal solitary waves in a twolayer fluid, a theoretical model for analyzing the interaction of internal solitary waves with tension leg platforms was presented by using coupling motion equations of six degrees of freedom for the floating body combining with the modified Morison formula. The observational data near the Dongsha Island were used as the characteristic parameters of the internal solitary wave, the characteristics of hydrodynamic load and motion response, as well as tension changs of the tethers for the ISSCTLP due to such an internal solitary wave were computed and analyzed. The results show that internal solitary waves will give rise to sudden impact load and motion response with the large amplitude, as well as remarkable increase of the tether tension. Therefore, the influence of internal solitary waves on the hydrodynamic characteristics of the deepsea platforms including TLP can not be neglected in their designs and applications.

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