海洋油气开采张力腿平台的水动力性能

 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。

Hydrodynamic performance research of offshore oil and gas exploitation TLP

The offshore oil and gas exploitation TLP's hydrodynamic performance is computed, and analyzed by using 3-D potential theory, API of wind and JONSWAP of wave in terms of hydrodynamic coefficients, 1st-order wave load, 1st-order motion response and 2ndorder difference frequency wave load. The results indicate that the 1st-order wave load on TLP of the out-of-plane presents a rapid decreasing trend with the increase of wave frequency. Heave/roll/pitch reach their peaks at the wave frequency 0.4 rad/s, the heave displacement is no more than 5% of water depth and the roll angle less than 5°. It is shown that TLP can effectively avoid wave/wind frequency concentrated areas, and safely work in variety of sea conditions. The 2nd-order difference frequency wave load in the y direction is about 4 times as large as the force in the x direction. Compared with the 1st-order wave loads, the 2nd-order difference frequency wave load is relatively small, but the damage for TLP can not be ignored.