导向架隔水管在波流联合作用下的非线性动力响应

考虑了波流联合作用下固定式钻井装置隔水管与导向架之间的间隙-接触条件，讨论了非线性边界条件下瞬态动力学问题的求解方法。应用有限元法，将隔水管简化为海底泥面线下3m处固支、下层平台简支、中间不同高度的横向振动被导向架限制的梁模型，采用ANSYS软件，利用其combination40单元来模拟隔水管与导向架之间的间隙-接触条件，实例计算了百年重现期环境载荷下隔水管的动力响应，得到了典型节点的位移-时间历程和典型单元的等效应力-时间历程，成功实现了隔水管的强度校核。该计算结果为带导向架隔水管的设计与分析提供了参考。

Non-linear dynamic response induced by wave-current for marine risers with guide-frames

Considering the gap-contact condition between guide-frames and the fixed drilling unit riser subjected to wavecurrent loads, the solution method for transient dynamic problem under the nonlinear boundary condition was discussed. By applying the finite dement method, the marine riser was modeled as the beam model which was fixed under the seabed mudline at the depth of three meters, simply supported at the lower deck, and its lateral vibration was restricted by guideframes at different elevation. Using ANSYS software, the gap-contact condition between marine riser and guide-frames was simulated by combination40 element. The non-linear dynamic response of marine riser under one-hundred-year wave-current environmental load was calculated, the displacement-time history of typical nodes and equivalent stress-time history of typical dements were also obtained, and strength check of the riser was then achieved successfully. The results provide reference for design and analysis of the marine risers with guide-frames.