The method of acquiring wave force amplitude fluctuation characteristics, step size and envelope of cylindrical array

Abstract

The invention provides a cylindrical array wave force amplitude fluctuation characteristic, step length and envelope line obtaining method. The method includes: establishing a coordinate system for acylinder array consisting of limited bottom-supported cylinders arranged in a straight line, and determining relevant parameters; analyzing the interference effect of diffracted waves of any cylinderand upstream and downstream cylinders thereof based on a long cancellation theory, obtaining a description model of a wave incident angle equal to zero and unequal to zero fluctuation spacing, the fluctuation spacing and an expression of peak and valley point horizontal coordinates, and determining a calculation step length of a wave force amplitude curve and a peak and valley point vertical coordinate; And connecting the peak / valley points to obtain an upper / lower envelope line of the wave force curve in the non-capture region. The invention further provides a method for establishing the waveforce amplitude curve fluctuation interval description model based on the diffraction theory. It is proved that the fluctuation interval is only related to the total number of cylinders in the cylinder array, the cylinder number for marking the cylinder position and the wave incident angle, the workload can be reduced on the premise that the precision is guaranteed, and the design and evaluationperiod is shortened.

Description

technical field [0001] The present 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 based on the theory of constructiveness and subtraction to establish the description of the wave force amplitude of the wave force on any cylinder in the non-capture area. The model, the method for determining the calculation step of the wave force amplitude curve, and the method for determining the envelope of the wave force amplitude curve in the non-capture area; A method for describing models of fluctuation spacing in capture zones. 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 econom...

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Problems solved by technology

This process is tedious and time-consuming even for very experienced specialists

For the inexperienced or completely inexperienced, the process can be very onerous and costly

[0009] Another problem is that at present, when designing and evaluating actual engineering structures based on the wave force curve, in order to avoid missing the peak and valley points of the wave force curve, it is usually necessary to perform a large number of complicated calculations on the wave force curve, which will cause Problems such as excessive time cost and high computational cost

In program evaluation, model selection or preliminary design, this approach will lead to inefficiency, greatly increase costs, waste time, and is very uneconomical

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