Dynamic response analysis of the equivalent water depth truncated point of the catenary mooring line

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• 作者：Huo-ming Zhang ; Ling-bin Kong ; Wei-bing Guan ; Sai-hua Huang…
• 关键词：Key wordsmooring line ; truncated point ; dynamic response ; lumped ; mass method ; time domain simulation
• 刊名：China Ocean Engineering
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：31
• 期：1
• 页码：37-47
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Offshore Engineering; Oceanography; Coastal Sciences; Fluid- and Aerodynamics; Marine & Freshwater Sciences; Numerical and Computational Physics, Simulation;
• 出版者：Chinese Ocean Engineering Society
• ISSN：2191-8945
• 卷排序：31

文摘

The real-time computer-controlled actuators are used to connect the truncated parts of moorings and risers in the active hybrid model testing system. This must be able to work in model-scale real time, based on feedback input from the floater motions. Thus, mooring line dynamics and damping effects are artificially simulated in real time, based on a computer-based model of the problem. In consideration of the nonlinear characteristics of the sea platform catenary mooring line, the equations of the mooring line motion are formulated by using the lumped-mass method and the dynamic response of several points on the mooring line is investigated by the time and frequency domain analysis method. The dynamic response of the representative point on the mooring line is analyzed under the condition of two different corresponding upper endpoint movements namely sine wave excitation and random wave excitation. The corresponding laws of the dynamic response between the equivalent water depth truncated points at different locations and the upper endpoint are obtained, which can provide technical support for further study of the active hybrid model test.