复杂海流载荷作用下的缓波形立管力学响应

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文章编号：00-3482（2025）06-000-3

关键词：缓波形立管；数值模拟；复杂海流流型；来流角度 中图分类号：TE952 文献标志码：A doi：0.3969/j.issn.00-3482.2025.06.00

Abstract：A mechanical model was established based on the concentrated mass method for the mechanical behavior of deep-sea slow wave risers under complex ocean current loads，and multi-condition numerical simulations were conducted using OrcaFlex software.The influence of diferent flow velocities and inflow angles on the deformation characteristics，tension，shear force，and bending moment distribution of the riser under three flow paterns： uniform flow，unidirectional shear flow，and linear bidirectional shear flow was systematically analyzed.Research has shown that under the action of uniform flow，the tension at the topof the riser increases quadratically with the flow velocity，reaching 1 283kN at 2.O m/s，indicating an increase of 24.81% compared to that at 0.5m/s . The bidirectional shear flow causes deformation in the "S" -shaped space，resulting in a 7.64% increase in tension extremum compared to uniform flow.When the flowvelocityexceeds 1.0m/s ，themaximumvaluesof shearforceandbendingmoment decrease by 50% （204 and 57% ，respectively，revealing the geometric stiffness enhancement effect. The maximum lateral displacement occurs at an inflow angle of 90o ，and the tension extremum difference in the 45o oblique flow condition reaches 5.3% ，confirming the anisotropic characteristics of the fluid structure coupling response. The research results provide a theoretical basis and technical support for the anti-current design and safety assessment of deep-sea risers.

Key words： slow wave riser;numerical simulation; complex ocean current pattern;current inflow angle

随着全球能源需求的持续增长和陆地油气资源的日益匮乏，深海油气开发占全球新油气发现的比例逐年上升，预计未来深水和超深水资源的开发将成为满足全球能源需求的关键手段之一[]。（剩余12237字）