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Determination Method of Calculation Step Size and Envelope Curve of Wave Force Amplitude Curve of Cylindrical Array

A technology for calculating step size and wave force, applied in the field of marine engineering, can solve problems such as time-consuming, laborious, expensive and cumbersome calculations

Active Publication Date: 2020-08-04
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Determination Method of Calculation Step Size and Envelope Curve of Wave Force Amplitude Curve of Cylindrical Array
  • Determination Method of Calculation Step Size and Envelope Curve of Wave Force Amplitude Curve of Cylindrical Array
  • Determination Method of Calculation Step Size and Envelope Curve of Wave Force Amplitude Curve of Cylindrical Array

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Embodiment Construction

[0116] Before elaborating the specific content of the present invention in detail, first introduce the method for determining the position and range of the wave force curve to capture the relevant areas (area I and area II) obtained by synthesizing the existing research results and our analysis results. (Region I and region II are the capture-related regions mentioned above. These two regions have significantly higher and deeper peaks and valleys than region III. In addition, another feature of these two regions is that the fluctuation distance changes with the dimensionless wave number changes)

[0117] 1) Area I (capturing the relevant area)

[0118]At present, many literatures have studied the trapped mode frequency problem of an infinitely long cylindrical array or a single cylinder arranged on the center line of a tank. These results can estimate the near-trapping wavenumber of a finite number of cylindrical arrays sitting on the bottom, that is, the position of area I ca...

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Abstract

The invention provides a method for determining a calculation step length and an envelope line of a cylindrical array wave force amplitude curve. The method includes: establishing a coordinate systemfor a cylinder array consisting of limited bottom-supported cylinders and arranged in a straight line, and determining relevant parameters; analyzing the interference effect of diffraction waves of any cylinder and upstream and downstream cylinders thereof on the basis of a constructive 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 point and valley point horizontal coordinates, and then determining a calculation step length of each area and peak point and valley point vertical coordinates; And connecting the peak points / valley points to obtain upper / lower envelope lines of the wave force curve in the non-capture area. 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 evaluation period 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. A model, a method for determining the calculation step of the wave force amplitude curve and a method for determining the envelope of the wave force amplitude curve 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 oce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F17/15
Inventor 曾晓辉孙哲于法军
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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