Piecewise extrapolation policy-based method for estimating dynamic response of mooring system

Abstract

The invention provides a piecewise extrapolation policy-based method for estimating a dynamic response of a mooring system. For a mooring positioning cable rope containing a composite component, the influence of factors such as gravity, tension, ocean current force, elastic elongation and the like of a mooring line is considered, and based on a piecewise extrapolation thought, the dynamic response of the whole mooring system is solved. Each component section is divided from a mooring point; then each component section is subdivided into different anchor chain units according to a discrete numerical method; in combination with a hydrostatic equation, a tension and direction span of the mooring line of each unit is calculated; and finally superposition is performed to obtain a total vertical span, and the total vertical span is compared with water depth, so that static characteristics of the whole mooring line can be obtained on the premise of meeting a precision condition. System excitation is given; a static characteristic curve of the mooring line is subjected to numerical fitting by utilizing spline interpolation; and force synthesis is performed by an included angle relationship between the distributed mooring line and a ship bow, so that the dynamic response of the mooring system is realized.

Description

technical field [0001] The invention relates to a mooring positioning method. Background technique [0002] Mooring positioning (Mooring positiong) can be said to be the earliest positioning method, which belongs to the passive positioning structure. Different from other positioning methods, it is mainly based on the reverse tension provided by the mooring line to offset the environmental force, thereby limiting the drift of the platform. The mooring system has the characteristics of low cost, simple structure and strong safety. Considering the relative advantages of the system in terms of cost and performance, it is still used as the main technical support in offshore operating platforms. However, as the water depth increases, the complexity of chain deployment and operation and maintenance will also increase. Coupled with the improvement of anchor chain materials and positioning technology, the configuration of the mooring system also presents a more diversified form. Th...

AI Technical Summary

Problems solved by technology

However, at present, many universities and scientific research institutes use large-scale finite element software for calculation of dynamic and static analysis of mooring systems, such as ABAQUS, ANSYS, PATRAN, etc., which integrate complex nonlinear characteristics with comprehensive multidisciplinary theories, and cannot For quick and easy engineering applications

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