Offshore crude oil export hoses are widely used for the offshore export of crude oil from FPSOs and tankers.These hoses are subjected to axial tension under marine environmental conditions,and the tensile stiffness is a key structural performance parameter affecting axial force.According to the requirements of the API SPEC 17K standard and the GMPHOM2009 specification,it is necessary to determine the tensile stiffness of the hose.Based on the Rebar method defining the cord reinforcement layer of offshore crude oil export hoses,a finite element model of the axial tension of a domestically produced offshore crude oil export hose is established using the ABAQUS finite element software.The tensile stiffness of the hose under different structural parameter conditions is calculated.The results show that the cord reinforcement layer is the main anti-stretching structural layer of offshore crude oil export hoses.The smaller the laying angle of the cord,the greater the tensile stiffness.The number of cord layers affects the anti-stretching capacity of the hose significantly;the more cord layers,the more significant the anti-stretching capacity of the hose.The steel bar diameter and pitch of the spiral reinforcement layer maintain a good linear relationship with the tensile stiffness of the hose within a certain range of tension.The tensile stiffness of the hose increases with the increase of steel bar diameter and decreases with the increase of pitch.The research results can provide reference for the structural design and practical application of offshore crude oil export hoses.
关键词
海洋输油软管/有限元模拟/拉伸刚度/帘线增强层/螺旋钢筋
Key words
offshore oil hose/finite element simulation/tensile stiffness/cord reinforcement layer/spiral reinforcement
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