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Title:: Numerical Simulation of the Spreading Dynamic Responses of the Multibody System with a Floating Base

Author(s):: Zhaobing Jiang¹; Luzhong Shao²; Fei Shao¹

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Keywords:: multibody system; Floating base; spreading form; dynamic response; homogeneous matrix method; wave load; wind load

DOI:: 10.1007/s11804-015-1302-1

Abstract:: To simulate the dynamic responses of the multibody system with a floating base when the upper parts spread with a certain sequence and relative speed, the homogeneous matrix method is employed to model and simulate a four-body system with a floating base and the motions are analyzed when the upper parts are spread sequentially or synchronously. The rolling, swaying and heaving temporal variations are obtained when the multibody system is under the conditions of the static water along with the wave loads and the mean wind loads or the single pulse wind loads, respectively. The moment variations of each joint under the single pulse wind load are also gained. The numerical results showed that the swaying of the floating base is almost not influenced by the spreading time or form when the upper parts spread sequentially or synchronously, while the rolling and the heaving mainly depend on the spreading time and forms. The swaying and heaving motions are influenced significantly by the mean wind loads. The single pulse wind load also has influences on the dynamic responses. The torque of joint 3 and joint 4 in the single pulse wind environment may be twice that in the windless environment when the system spreads with 60 s duration.

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Journal of Marine Science and Application[ISSN:1002-2848/CN:61-1400/f]

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