A description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction

A technology of wave force and cylinder, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as lack of deep understanding of wave characteristics

Active Publication Date: 2019-05-07
INST OF MECHANICS - CHINESE ACAD OF SCI +1
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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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  • A description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction
  • A description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction
  • A description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction

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Embodiment Construction

[0081] 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)

[0082] 1) Area I (capturing the relevant area)

[0083] 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 c...

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Abstract

The invention provides a description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction. Analyzing the wave path difference of two paths of diffraction generated when incident waves are transmitted to any cylinder and diffraction generated when incident waves are transmitted to an array farthest-end cylinder at the upstream or downstream ofthe cylinder based on a wave construction and destruction interference theory, so as to obtain a preliminary fluctuation interval expression; And then, analyzing the comprehensive effect of diffraction waves of cylinders at upstream and downstream of the cylinder, correcting an initial fluctuation interval expression, and performing synthesizing to obtain a final expression and a description model of the fluctuation interval of the wave force amplitude curve of any cylinder. The fluctuation interval of the wave force amplitude curve in the non-capture area is not changed along with the changeof the dimensionless wave number and is only related to the total number of cylinders in the cylinder array, the number of the columns 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 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 principle of constructive and destructive waves to establish the wave force amplitude of any cylinder subjected to wave force in the non-capture area fluctuation distance description model. 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 actu...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 曾晓辉王琪于法军
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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