海洋双胎体软管在扭转载荷下力学行为研究

Gao Songlin，An Chen，Wei Daifeng，etal.Mechanical behavior of marine dual-carcass floating hoseunder tor-sional load[J].ChinaPetroleumMachinery，2025，53（6）：91-98.

MechanicalBehaviorofMarineDual-Carcass FloatingHoseUnder TorsionalLoad

Gao Songlin ^1，2，3 An Chen ^1，2，3 Wei Daifeng4Yang Haoyue1Li Youans （1.Collg ofSafetyand Ocean Enginering，China Universityof Petroleum（Beijing）;2.KeyLaboratoryofOilamp;Gas Production SafetyandEmergencyTechnology3.KeyLaboratoryStateAdministrationforMarketRegulation;4ChineseAcademyfGeological Sciences；5.Hebei ZebungRubberTechnologyCo.，Ltd.）

Abstract：Torsionalload is one of the main loads on offshore floating hose during service，and torsional rigidity is akey mechanical performance parameteroffloating hose.The existing floating hoses are designed and manufactured subjecttothe standards OCIMF2OO9 and API17 K，and there is no detailed description of the torsional mechanical performance indicators and key structural parameters of the floating hose.In this paper，a nonlinear mechanical model ofdual-carcassflotation hose under torsional load was built basedon Rebarelementand Embedded embedding technology.Then，a full-scale torsional test was conducted to verifytheaccuracyof the finite element model.Thirdly，the clockwise/counterclockwise torsional mechanical performance of the dual-carcass floating hose under fixed/unfixed axial freedom was analyzed.Finally，the sensitivity analysis of the friction coefficient between the innerandouter carcasses ofthehose，the inner diameterofthe hose，thenumberof layersof the inner carcass cord，the winding angle of thecordand the pitchof the spiral reinforcement was carried out.The study results show that when the torsional direction of the hose isopposite to the winding directionof the spiral reinforcement，the torsional rigidity is greater，and theradialdisplacementof thehose is lessaffcted bythedeformation directionofthespiralreinforcement.Whentheendof thehose isnotfixed，the axial displacementshowsaninward shrinkage trend with the increaseof the torsion angle.Afectedbythe geometricnonlinearfactor，the torsional rigidityof thehose increases with the increase ofthe torsion angle.The inner diameterof the hose，the numberof layersof the inner carcasscord，the winding angleofthecordand the pitchof the spiral reinforcement have great influences on the torsional mechanical performanceof the hose.The study results provideareference for the structural design and application of hoses.

Keywords：marine dual-carcass floating hose;torsional rigidity；torsional test；sensitivity analysis

0 引言

随着海洋油气开采力度的加大，海洋双胎体软管越来越广泛地应用于SALM、CALM系统中[1]。海洋开采的油气从水下管汇流经水下软管、浮筒、漂浮软管到达穿梭油轮[2，水下软管与漂浮软管在输油状态下受到浮力、波浪以及洋流的共同作用，扭转载荷是海洋双胎体软管的主要载荷之二[3]。相比于单胎体软管，双胎体软管为海洋油气运输提供额外一层保护，在南海油气运输作业中应用更为广泛。双胎体软管的扭转力学性能关乎海洋油气的安全输运[4]，现有OCIMF2009规范与API17K标准仍缺少关于详细的设计指导以及扭转力学性能指标，因此对海洋双胎体软管在扭转载荷下的力学性能分析以及研究不同参数变化对软管力学性能的影响就显得尤为重要。

双胎体软管（水下软管和漂浮软管）的管体结构分为内胎体与外胎体，内胎体由橡胶层、帘线层和螺旋钢筋层组成，外胎体由橡胶层和帘线层组成，漂浮软管含有浮体层[5]。螺旋钢筋复合层是复合软管力学性能的主要贡献者[6-8]。M.L.P.TONATTO等[9]、GAOQ.等[10]将螺旋钢筋等效为环向加强筋，研究了漂浮软管极限内压下的失效机制。WEID.F.等[1]考虑到单胎体漂浮软管螺旋钢筋的非对称性，采用全尺寸试验与数值模拟的方法对单胎体漂浮软管在扭转载荷下的力学性能进行研究。金邦杰等[对漂浮软管的弯曲及动态特性进行分析，提出软管的两端需要做加强处理。李龙胜[13]引入Hashin渐进失效作为纤维增强热塑性复合管道的判定准则，对复合管道在极限扭转载荷下的失效模型进行了分析。……