新型导管架复合式深吃水半潜平台概念导管架对平台整体垂荡、横摇和纵摇运动的影响分析

摘要

The vertical motions of a new dry tree semisubmersible concept for the South China Sea is presented. The hull configuration of the new semisubmersible concept consists of a deep draft semisubmersible hull and a central jacket which supports the platform topsides. In this paper, both experimental and numerical results were derived for different sea states. Main differences between this new floating concept and the traditional Semis with the similar underwater structure were inves-tigated using the frequency-domain analysis method to explore the motions of the new floating con-cept. The effects on heave, roll and pitch motions resulted from the jacket are studied by using the linear potential theory and Morison equation. The results show that influence caused by the jacket part is minimal and so its designed benefit is only slightly discounted.%导管架复合式深吃水半潜平台是近年来为了适应南海恶劣海况而提出来的新型干树半潜平台概念，主要由传统的深吃水半潜平台和导管架两部分组成。导管架的设计主要是为了支撑上层甲板结构，提高平台稳性和气隙性能。文章主要针对该平台概念的垂直平面运动进行分析，对不同海况下平台系统的数值和模型试验的结果进行了对比分析，运用频域分析方法分析了该平台与传统半潜平台之间的区别。并重点分析了导管架部分对平台垂直平面内的运动造成的影响。结果表明，该平台概念较传统的半潜平台而言具有较好的垂向运动性能，而且导管架部分对平台垂直面内的运动影响较小，导管架设计的主要优势并未受到较大的折减。