A description model of fluctuation intervals of wave force amplitudes of a cylindrical array in a non-capture area

Abstract

The invention provides a description model of fluctuation intervals of wave force amplitudes of a cylindrical array in a non-capture area, comprising the following steps: listing the velocity potential of water wave diffraction near any cylinder, the diffraction coefficient being determined by a linear equation set; Solving the linear equation set by adopting a Claimer rule to obtain a target square matrix determinant; Ignoring the quantity slowly changing along with the wave number in the square expression of the determinant model to obtain a target expression; Solving a first derivative of the expression and enabling the first derivative to be equal to zero to obtain a transcendental equation; And deducing a fluctuation interval expression of any cylindrical wave force amplitude curve byusing a transcendental equation, and performing synthesizing to obtain a description model of the non-capture region. The method has the advantages that the fluctuation interval of the wave force amplitude curve in the non-capture area is not changed along with the change of the dimensionless wave number and is only related to the total number of cylinders in the cylinder array, the number of thecolumns marking the positions of the cylinders and the wave incident angle, and accurate prediction can be realized by the aid of a formula provided by the invention.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to a cylinder array composed of a large number of cylinders penetrating the water surface under the action of waves, and a description model of the wave force amplitude of the wave force on any cylinder in the non-capture area. Background technique [0002] The ocean, which accounts for 71% of the earth's surface area, is rich in recoverable resources such as oil and natural gas, and renewable energy such as wind energy and wave energy that can be used by human beings for a long time. With the increasing demand for energy and resources in economic development, it has become an obvious trend to expand living space in the ocean and seek various materials and energy supplies. [0003] Whether it is the exploitation of marine resources, the development of offshore space, or the actual use of marine renewable energy, it is necessary to develop offshore structures as carriers. Among the...

AI Technical Summary

Problems solved by technology

As for the non-capturing region, which accounts for most of the wave force curve, that is, region III (this region has practical significance for evaluating the fatigue life of structures), there is still a lack of deep understanding of its wave characteristics, and there is no wave force amplitude that varies with dimensionless The description model of the wave force curve formed by the change of wave number in the non-capture area is used as the basis for efficient evaluation and design

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