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对钢悬链线立管的运动进行了时域模拟,采用三维集中质量模型对深海立管进行离散,考虑重力、浮力、流体拖曳力、张力、惯性力、剪切、弯曲刚度及海床作用的影响。分别用Newton-Raphson和Newmark-β数值方法求解立管的静态、动态特性。分析了钢悬链线立管的构型、张力、剪力和弯矩特性,系缆在顶端不同幅值不同频率激励下疲劳特征点的有效张力变化趋势,并对比分析了剪切、弯曲刚度对钢悬链线立管疲劳特征点产生的影响,文中的结论可以为工程应用提供参考。
The time-domain simulation of the riser riser of steel catenary was carried out. The three-dimensional concentrated mass model was used to discretize the deep sea riser. Considering gravity, buoyancy, fluid drag, tension, inertial force, shear, bending stiffness and seabed Impact. The static and dynamic properties of the riser were solved by Newton-Raphson and Newmark-β numerical methods respectively. The configuration, tension, shear force and moment characteristics of riser of steel catenary were analyzed. The effective tension of the fatigue characteristic points under different amplitude and amplitude of the top of the mooring line was analyzed. The shear and flexural rigidity On the catenary steel riser fatigue characteristics of the point of impact, the conclusions of the paper can provide a reference for engineering applications.