摘要
基于三维势流理论,在API风谱及JONSWAP波浪谱环境条件下,通过计算分析,研究了海洋油气开采张力腿平台的水动力性能。结果表明,张力腿平台的水平面外运动受到的波浪载荷,随着波浪频率的增大呈现快速下降趋势;垂荡、横摇及纵摇运动响应在波浪频率为0.4 rad/s时达到峰值,且垂荡运动位移不超过工作水深的5%,摇角不超过5°,体现了张力腿平台半刚性的运动特点;二阶差频波浪载荷作用于张力腿平台的y方向力约为x方向力的4倍,与一阶波浪载荷相比,二阶差频波浪载荷相对较小,但对张力腿平台的水平面内运动影响不容忽视。
The offshore oil and gas exploitation TLP＇s hydrodynamic performance is computed, and analyzed by using 3- D potentialtheory, API of wind and JONSWAP of wave in terms of hydrodynamic coefficients, 1st-order wave load, 1st-order motion response and 2nd-order difference frequency wave load. The results indicate that the 1st- order wave load on TLP of the out- of- plane presents a rapiddecreasing trend with the increase of wave frequency. Heave/roll/pitch reach their peaks at the wave frequency 0.4 rad/s, the heavedisplacement is no more than 5% of water depth and the roll angle less than 5°. It is shown that TLP can effectively avoid wave/windfrequency concentrated areas, and safely work in variety of sea conditions. The 2nd-order difference frequency wave load in the y directionis about 4 times as large as the force in the x direction. Compared with the 1st-order wave loads, the 2nd-order difference frequency waveload is relatively small, but the damage for TLP can not be ignored.offshore oil and gas exploitation tension leg platform（TLP）; 1st- order wave load; 1st- order motion response; 2nd- order r difference equency wave load is relatively small, but the damage for TLP can not be ignored.
出处
《科技导报》
CAS
CSCD
北大核心
2016年第18期251-257,共7页
Science & Technology Review
基金
国家自然科学基金项目(51009037)
关键词
海洋油气开采张力腿平台
一阶波浪载荷
一阶运动响应
二阶差频波浪载荷
offshore oil and gas exploitation tension leg platform（TLP）
1st-order wave load
1st-order motion response
2nd-order difference frequency wave load
