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随着油气资源勘探和开发活动不断向深海发展,钢悬链线立管(SCRs)成为深海浮式生产系统油气输送的首选立管。该文在钢悬链线立管动力学模型研究中提出一种新模型:SCR刚体转动模型,该模型基于SCR悬垂段大曲率的考虑,假定立管为绕悬挂点与触地点连线形成的转动轴的刚体转动系统,并将该转动效应以惯性力和水动力阻尼的形式与立管弯曲振动耦合,进行立管的出平面运动分析。数值模拟算例表明,刚体转动效应对钢悬链线立管的动力响应具有较大影响,为立管动力分析中不可忽略的运动分量。
As oil and gas exploration and development activities continue to develop into the deep sea, steel catenary risers (SCRs) become the first choice for oil and gas pipelines in deep-sea floating production systems. In this paper, a new model of SCR rigid body rotation model is proposed in the study of steel catenary riser dynamic model. Based on the large curvature of SCR suspension section, it is assumed that the riser is formed by the connection of suspension point and touch point Rotating the rigid body rotating system of the shaft, and coupling the rotating effect with the bending vibration of the riser in the form of inertial force and hydrodynamic damping, to analyze the out-of-plane motion of the riser. Numerical simulations show that the effect of rigid body rotation has a great influence on the dynamic response of riser riser, which is a component that can not be neglected in the dynamic analysis of riser.