中文摘要：

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。

英文摘要：

This paper mainly focuses on time domain simulations of the steel catenary riser A three-dimensional lumped mass model is built to obtain characteristics of the riser considering the influences of the gravity, buoyancy, current-induced dragging .force, tension, inertia .force, shear force and the bending stiffness. Then a Newton-Raphson method and Newmark-β method are respectively adopted to solve static and dynamic equations. Riser configuration, effective tension, shear force and the bending moment are investigated and the motion characteristics in different exciting amplitude and.frequency are carried out. In addition, influences of the shear force and bending moment on the characteristics of the riser are analyzed in detail. The results can be used as references for engineering applications.