Force analysis method of single point buoy mooring system of extra-large ship under coupling action of stormy waves

Abstract

The invention relates to a force analysis method of a single point buoy mooring system of an extra-large ship under the coupling action of stormy waves and provides a mooring force mathematical model suitable for a single point buoy anti-typhoon mooring system of the extra-large ship, which are used for performing identification modeling on a non-steady motion strained condition under a typhoon environment and performing a mathematical simulation test and actual measurement verification on the force motion of the ship without power and interference effects of the typhoon environment. Required input and output data are provided for the identification modeling of the mathematical model through a ship motion physical model test of a single point mooring ship model under the action of wind, currents and waves; and a mooring curve of a buoy type anti-typhoon single point mooring system is deduced and the influence of all component parts on the mooring curve is analyzed by researching a ship-buoy motion law based on catenary and cubic parabola theories, so that the key technical problem of the design of the single point buoy anti-typhoon mooring system is solved.

Description

Force analysis method of single point buoy mooring system of super large ship under coupling effect of wind and wave technical field The invention relates to the field of typhoon-proof single-point buoy mooring, in particular to the configuration of typhoon-proof buoy type wind single-point mooring facilities for super-large ships. Background technique The national army standard "Windproof Mooring Water Drum" (GJB1119.91) promulgated in 1991 stipulated the design and use of the military single-point buoy anti-typhoon mooring system, but due to theoretical shortcomings and poor applicability, especially for super large The reason for the poor applicability of ships has not been popularized and used, resulting in the configuration of anti-typhoon buoy type wind single point mooring facilities for large and super large ships in my country has been in an unsuitable situation. The function of "Windproof Mooring Water Drum" (GJB1119.91) is to ensure the safety of windproof moori...

AI Technical Summary

Problems solved by technology

(1) The existing research on typhoon-proof buoy-type single point mooring systems is mostly limited to small and medium-sized ships or naval super-large ships in non-extreme sea conditions. Research on Mooring System of Anti-Typhoon with Single Point Buoy under Condition

(2) With the enlargement of my country's ships and the development of the shipbuilding industry, the original standard can no longer meet the requirements for use

(3) There is a lack of scientific understanding of the ship's motion laws, force characteristics and the response of different hydrometeorological conditions to the system under the typhoon

(4) Due to the comprehensive influence of random factors such as wind load, wave force, and water flow force in the sea area, the random dynamic change of the anchor chain pull force, especially the maximum transient pull force caused by sudden wind and wave changes and disaster weather, the above force The model is complex, and the model parameters need to be checked and corrected by the measured data. In the absence of the measured data under the action of typhoons, it is difficult to establish accurate and scientific mathematical models of single-point mooring and double-point mooring

(5) Different ship types have different requirements for the buoy mooring system, and there are certain differences in the models. However, the existing models are not specific to the specific ship type, and the pertinence is poor, which brings a lot of inconvenience to the actual application

In summary, in view of the fact that most of the current research on single point mooring systems is limited to berthing and loading and unloading operations, and rarely involves single point mooring in the windproof state, the existing research results on windproof single point mooring systems cannot meet the requirements of use , especially for the windproof single point mooring of very large ships, there are very few research materials

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