固定塔式单点系泊系统中塔架结构的疲劳分析

Fatigue Analysis of Fixed Tower Structure for a SPM System

本文针对我国海域使用的固定塔式单点系泊系统,提出使用理论分析手段估算单点系泊系统中塔架结构因系泊油轮的往复运动造成的疲劳损伤;在中海石油工程设计公司现有计算分析软件SACS,OSCAR—Ⅱ的基础上,开发了用于OS-CAR—Ⅱ结果处理的数值滤波、等效幅值、等效频次统计的辅助软件;并以某实际系泊系统为例,计算了一个方向上波浪荷载直接和间接作用引起的疲劳损伤。

Aiming at the fixed tower type SPM used in offshore China, a theoretical analysis method is proposed to estimate the fatigue failure of tower structure due to the alternating motions of FPSU ; In addition to the existing software of SACS and OSCAR- Ⅱ , supplemental softwares have been developed to process the results OSCAR- Ⅱ : Taking a certain existing mooring system as example, the fatigue failure induced by direct and indirect action of wave load in one direction is calculated.