1.State Kay Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China；
2.Collaborative Innovation Center for Advance Ship and Deep-Sea Exploration, Shanghai 200240, China;
3.Tianjin Design Institude, China Petroleum Pipeline Engineering Co., Ltd., Tianjin 300457, China
Abstract：Aiming at the strong nonlinear coupling property of the hull-mooring system, the time-domain numerical simulation analysis was carried out to study the mechanism of complex motion responses under the local mooring failure of a tension leg platform (TLP).The balance position, motion magnitude and nonlinear components in the heave motion response under simultaneous failure of two tendons were emphatically analyzed.The results show that the equilibrium position of heave motion under wave loading is the same as that in calm water.The change of the equilibrium position depends on the change of the tension and stiffness of tendons.In the case of the complete tendon and the failure of single tendon, the heave motion of the platform under regular wave at 0° is a linear motion, while in the case of the simultaneous failure of two tendons, the heave motion is a nonlinear motion.The nonlinear components are closely related to the wave height.The higher the wave height is, the more obvious the nonlinear components are.The radiation force and mooring force contribute most to the nonlinear motion of the platform.
成司元1,2，余杨1,2，余建星1,2，郝帅1,2，吴静怡1,2，张春迎1,2，康煜媛3. 张力腿平台局部系泊失效下复杂运动响应机理研究[J]. 振动与冲击, 2021, 40(10): 187-195.
CHENG Siyuan1,2,YU Yang1,2,YU Jianxing1,2,HAO Shuai1,2,WU Jingyi1,2,ZHANG Chunying1,2,KANG Yuyuan3. Mechanism of the complex motion response of a TLP under tendon failure. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(10): 187-195.
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