摘要
从提高锚泊系统收放时效性入手,提出了一种半潜式钻井平台复合式锚泊系统组分配比优化设计方法,旨在尽可能降低复合式锚泊系统的钢链配比长度,提高收放效率。结合锚泊系统设计参数,制定优化设计准则,建立优化分析流程,采用ANSYS-AQWA建立锚泊定位半潜式平台水动力分析模型,获得平台运动参数和锚链动力参数,对平台漂移量、锚链最小安全系数、走锚临界张力、锚链最小卧底长度和起锚力进行无量纲指标分析,并综合考虑张力倾角与预张力对优化结果的影响,获得复合式锚泊系统钢链与钢缆的最优配比关系,确定最优钢链长度为395 m,较原钢链长度缩短225 m,钢链收放时间降低36%,进一步提高锚泊系统收放时效性,并降低平台可变荷载。
An optimum design method for composite mooring system components of semi-submersible drilling platform is proposed to decrease the chain length in mooring system in order to increase deploying and retracting efficiency of mooring line. Optimum design criterion and process are developed, combined with design parameters of mooring system. Hydrodynamic model of moored semi-submersible platform is established,and results of platform and mooring system are obtained based on ANSYS-AQWA. The optimum length of chain is 395 m,by analyzing dimensionless parameters for offset of platform,minimum safety factor of mooring system,anchor dragging,grounding length of mooring line and uplift force of anchor,and considering the effect of pretension angle and pretension on steel chain reduction. The efficiency of deploying and retracting of mooring line is improved,and the variable load of platform is decreased.
出处
《海洋工程》
CSCD
北大核心
2017年第5期95-102,共8页
The Ocean Engineering
基金
国家自然科学基金资助项目(51239008)
国家重点基础研究发展计划("973"计划)资助项目(2015CB251203)
中海油深海开发有限公司资助项目(YXKY-ZY-2014-SHENHAI-03)
关键词
复合式锚泊系统
优化设计
半潜式钻井平台
composite mooring system
optimization design
semi-submersible platfomi
