基于二阶耦合响应的半潜式生产平台运动研究

摘要

半潜式生产平台常年作业于海上油田,需具备更强的抵御恶劣海况的能力,而一阶频域运动计算无法与模型试验结果匹配,不足以准确评估平台在生存海况下的运动性能.基于二阶频域分析方法,计算分析了深水半潜式生产平台的运动响应,并通过与模型试验结果比对,证实了基于二阶耦合响应运动计算方法的适用性.此外进行了平台二阶响应的影响因子分析,为平台运动性能的优化设计提供参考.%Semi-submersible production unit is permanently used in oilfield,which re quires better seakeeping performance.First order motion theory is insufficient to accurately estimate the motions of the unit in survival sea state.Base on time domain analysis for second order response,the heave and roll motions are calculated for Semi-submersible production unit.The calculated results are compared with results of the model test to prove accuracy of the calculation method.Further study for second order motions influencing factors are implemented,which can provide the reference for design of semi-submersible production unit.