环境载荷对自升式钻井平台动力响应的影响

Effect of Environmental Loads on Dynamical Responses of Jack-up

为了研究海流载荷、波浪载荷、风载和浮力等环境载荷对自升式钻井平台力学响应的影响,进行了某平台在自存工况和作业工况下的数值分析。分别采用等效梁单元、梁单元、线性弹簧单元和线弹性基础模型来模拟船体、桩腿、船体-桩腿和桩靴-土壤。应用Stokes fifth-order波浪理论模拟水质点的运动规律,得到平台的响应特性。考察了各种环境载荷对平台数值计算结果的影响。结果表明:在自升式平台建模过程中,须要考虑浮力的作用,还应特别关注风载的影响,其次是海流载荷,最后是波浪载荷。

In order to investigate effect of current, wave, wind and buoyancy loads on mechanical responses of a jack-up, numerical analysis of a jack-up in both survival and operating conditions was performed in this paper. The hull, leg, hull-leg connection, spudcan-soil interaction was modelled using equivalent beam, beam element, spring element, elastic foundation model, respectively. And fluid particle movement was simulated using Stokes fifth-order theory. Finally, effect of the four environmental loads on numerical simulation of the jack-up was summarized. The results showed that buoyancy need to be defined in jack-up numerical model; wind load was the most important factor and was followed by current, and the last one was wave in the model.