FPSO内孤立波载荷实验及其理论模型研究  

Experiments and theoretical model on the load characteristics of the FPSO in internal solitary waves

作　　者：许忠海[1] 尤云祥[1] 黄文昊[1] 胡天群[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2014年第1期24-33,共10页Chinese Journal of Hydrodynamics

基　　金：国家高技术研究发展计划资助项目(863计划;2010AA092305);高等学校博士学科点专项科研基金(20110073130003)~~

摘　　要：该文在大型重力式密度分层水槽中,对内孤立波作用下FPSO载荷特性开展了系列实验,研究表明,FPSO的内孤立波载荷包括船体水线表面的摩擦阻力和Froude-Krylov力两个部分。并基于两层流体内孤立波的KdV、eKdV和MCC理论,建立了这两个载荷成分的理论预报模型。系列实验结果表明,摩擦阻力系数与内孤立波诱导速度场的雷诺数之间为反比例关系,而且基于所建立理论预报模型所获FPSO的水平力、垂向力及其力矩计算结果与系列实验结果一致。该项研究以系列实验结果为依据,为海洋工程FPSO的内孤立波载荷预报提供了一个实用的理论计算模型。Experiments on the load characteristics of the FPSO in internal solitary waves are carried out in a large-scale density stratified tank. It is shown that the loads on the FPSO due to internal solitary waves consist of two parts： the frictional resistance and Froude-Krylov force on the hull beneath its waterline. A theoretical model is established for predicting these loads by use of KdV, eKdV and MCC theories for internal solitary waves in a two-layer fluid. Series experimental results show that the frictional resistance coefficient follows an inverse power function relationship with the Reynolds number based on the velocity field induced by the internal solitary wave. Moreover, the numerical results of horizontal forces, vertical forces and torques on the FPSO based on the presented theoretical predicting models have good agreement with experimental ones. The investigation provides a practical theoretical model on the basis of the series experimental results for predicting internal solitary wave loads on the FPSO.

关 键 词：两层流体 内孤立波 FPSO 摩擦阻力 Froude-Krylov力 

分 类 号：O352[理学—流体力学]