Multi-buoy Mooring System Dynamic Analysis And Software Development

Mooring cable structure in the form of catenary is simple, accurate positioning, is currently the main form of floating mooring, but because of the limitations of its dynamic performance and structural features, it cannot satisfy the needs of the development of science and technology. In the deep or bad sea condition, mooring system requires a good dynamic stiffness, so as to ensure the safe and reliable positioning vessel or platform; secondly, in the pipeline dense waters, cable catenary form at the bottom of the sea easily with other has laid on the seabed pipe line cause interference. Based on the above two reasons, buoy mooring system because of its good dynamic stiffness and structural features are gradually applied in some specific engineering field.In this paper, based on the tiny vibrating principles deduced mooring system hanging equation, iterative method chain line in Matlab seeking multi-buoy mooring rope attitude algorithms and experimental data confirm the reliability of the algorithm; Based on lumped mass method of mooring system dynamics modeling, and thus determining flow rate on the mooring rope tension reference DNV and API specification AQWA in the traditional cylindrical platform and mooring system to do the overall performance analysis, enable the multi-buoy mooring system could satisfy the requirement of specification of the mooring cable breakage allowable tension, platform displacement range meet the requirements of the specification limit displacement, and through AQWA-AGS reading the data, analyzing the direction of the incident wave and the mooring line affect the shape and cable tension, getting the system working situation and the change of the tension distribution; Through statics and parameter sensitivity of multi-buoy mooring cable posture, forming theory, semi-empirical algorithms, and developing multi-buoy mooring system analysis software applications, providing the initial conditions for buoy design calculation, by applying the software interface of input parameters, automatic optimization, and getting optimal mooring scheme. Be based on these research data, gaining more buoy mooring rope static posture, building a dynamic model of a cylindrical deep-water environment platform mooring system. Through frequency domain analysis evaluation platform campaign performance, analysis of cable tension with external force curve by the time-domain, in order to gain more power parameters buoy mooring system, getting mooring rope tension fluctuations dynamic range. The final design is multi-buoy mooring system application software, automatic optimization by a given static parameters, and seeking the best mooring solutions. Through the analysis of this paper provides theoretical and experimental data support for applications and multi-buoy mooring system, as the specification request of multi-buoy mooring system provides the reference for the selection of the best mooring scheme.