摘要
针对半潜式平台的立柱群和沉箱群,设计了两套独立的载荷测量系统,利用大型重力式密度分层水槽,在不同来波方向下对孤立波中半潜式平台载荷进行了系列模型试验。研究表明,对平台立柱部分,其内孤立波载荷可以用Morison公式进行计算,基于试验结果建立了Morison公式中其拖曳力系数以及惯性力系数的经验公式;对于半潜式平台的沉箱部分,当来波方向与其中纵剖面不平行时,其水平内孤立波载荷同样可以使用Morison公式进行计算,并建立了Morison公式中其拖曳力系数以及惯性力系数的经验公式;当来波方向与半潜式平台中纵剖面平行时,沉箱群的水平内孤立波载荷可以采用Froude-Krylov公式进行计算;同时,在不同来波方向下沉箱群的垂向载荷同样可以采用Froude-Krylov公式进行计算。
Two independent devices are designed to measure loads exerted on the columns and pontoons of a semi-submersible platform,and a series of experiments for internal solitar^^ wave loads of such a platfor^n with different wave incidence angles are carried out in a large-scale gravity type density stratified tank. Results show that,for the columns of the platfor^n,the horizontal forces exerted by internal solitary waves can be calculated by using Morison formula,and an empirical formula is established to determine the drag and inertia coefficients in Morison for^mula based on results of the experiments. The horizontal forces exerted on the pontoons can also be cal-culated by using Morison formula when the wave direction is not parallel to the central longitudinal section of the platfor^m,and an em-pirical for^mula is established to deter^mine the drag and inertia coefficients in Morison for^mula. When the wave direction is parallel to the central longitudinal section, the horizontal forces exerted on the pontoons can be calculated by using Froude-Krylov formula. Meanwhile,results also show that the vertical force exerted on the pontoons under different wave directions can also be calculated by using Froude-Krylov formula.
作者
陈晨
尤云祥
陈科
CHEN Chen;YOU Yunxiang;CHEN Ke(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)
出处
《海洋工程》
CSCD
北大核心
2018年第4期28-38,共11页
The Ocean Engineering
基金
国家自然科学基金资助项目(11372184)
国家重点基础研究发展计划(973计划)(2015CB251203)
