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Dynamic Response Analysis of the Equivalent Water Depth truncated point of the Catenary Mooring Line

China Ocean Engineering 2017年第1期31卷 37-47页

作者： ZHANG Huo-ming KONG Ling-bin GUAN Wei-bing HUANG Sai-hua FANG Gui-sheng College of Metrology and Measurement Engineering China Jiliang UniversityHangzhou 310018China State Key Laboratory of Satellite Ocean Environment Dynamics(Second Institute of Oceanography SOA)Hangzhou 310012China Institute of Hydraulic & Environmental Engineering Zhejiang University of Water Resources and Electric PowerHangzhou 310018China Mechanical and Automotive Engineering College Zhejiang University of Water Resources and Electric PowerHangzhou 310018China

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.

关键词： mooting line truncated point dynamic response lumped-mass method time domain simulation

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