Dynamic Characteristics Analysis of the Rigid Flexible Coupling Multi-body System of Wharf-cable-dynamic Positioning Vessel

• Published in: IOP Conference Series: Materials Science and Engineering
• Main Authors: Zhang, Dapeng, Bai, Yong, Zhu, Keqiang, Liu, Jian
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2019
• Subjects: Orca
• Online Access: http://dx.doi.org/10.1088/1757-899x/612/3/032068; https://iopscience.iop.org/article/10.1088/1757-899X/612/3/032068/pdf; https://iopscience.iop.org/article/10.1088/1757-899X/612/3/032068

Abstract In order to study the coupling effect of the rigid-flexible multi-body system composed of the dynamic positioning vessel, the wharf and mooring cables in mooring state, the lumped mass method was applied to discretize the mooring cables into lumped mass models for the calculation of the mooring tension of the mooring system, the nonlinear reaction force of dock fenders was simulated by Link unit in Orca Flex, and the thrust allocation of thrusters was based on PID control system. The full coupling dynamic time-frequency characteristics of the multi-body system has been analysed. The results show that the performance of the side thruster and vessel’s positioning capability can be improved effectively when the target position is selected reasonably.