风浪流中Truss Spar平台耦合动力响应分析

摘要

采用时域耦合分析方法,研究了Truss Spar平台浮体/系泊/立管系统在不规则波浪及风流作用下的耦合动力特性问题.比较分析了SCR及TTR两种立管形式对平台浮体运动响应及其系泊张力变化特性的影响,同时还考虑了在极端海况下当有系泊断裂时,平台运动响应及其系泊张力的变化特性.研究表明,在耦合立管后,平台运动响应及系泊张力特性变化明显,特别是耦合TTR时,平台运动响应及系泊张力幅值显著减小.当平台遭遇恶劣海况发生系泊断裂时,对平台运动响应及其系泊系统动力响应特性都会产生显著影响.%The dynamic responses of Truss Spar with the mooring/riser system in irregular waves,wind and current environments are considered by use of the coupled dynamic analysis.The impact of the SCR and TTR on the motion specturms of the platform and tension specturms of the mooring lines are analysized.Furthermore,the dynamic characteristics of the platform and its mooring system are also considered for the case where some mooring lines are broken under extreme sea conditions.Results show that when the risers exist,the dynamic characteristics of the platform and its mooring system change remarkably,and especially the amplitudes of the motion and tension spectrums are reduced significantly when TTR exist.When some mooring lines are broken under extreme sea conditions,the influence of such a case on the dynamic characteristics of the platform and its mooring system is remarkable.