Method for simulating influence of flexible net on wave propagation

A simulation method and wave technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of long time consumption, difficulty in giving the change of wave propagation in net clothing, and high cost of physical model experiment simulation

Active Publication Date: 2013-08-07
DALIAN UNIV OF TECH
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Problems solved by technology

Since the net is a special marine engineering structure, it is completely different from the marine structures usually used in ports, offshore oil fields, etc., and has the characteristics of large deformation, flexibility, and porosity. Due to the limitation of observation technology, it is difficult to give the change of wave propagation near the net

Method used

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  • Method for simulating influence of flexible net on wave propagation
  • Method for simulating influence of flexible net on wave propagation
  • Method for simulating influence of flexible net on wave propagation

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the drawings.

[0056] Such as Figure 1-2 As shown, the simulation experiment performed by the method of the present invention is as follows:

[0057] Physical model experiment: The experiment was carried out in the wave current tank of the State Key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology. The experimental water tank is 22m long, 0.45m wide, and the experimental water depth is 0.4m. The experimental net is a diamond-shaped polyethylene net with a size of 0.3m×0.3m, and is fixed at the center of the sink through a steel frame, and the upper edge of the frame is flush with the water surface. The detailed parameters of the net are shown in Table 1, and the selected wave parameters are shown in Table 2.

[0058] Table 1 Detailed parameter list of experimental nets

[0059]

[0060] Table 2 Wave parameters of model experiment

[0061]

[0062] Table 3 Model experim...

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Abstract

The invention discloses a method for simulating influence of a flexible net on wave propagation. The method comprises the steps of adopting a method for generating a wave through a pushing plate, generating the wave according to a wave generation equation form, combining with a continuity equation and a momentum equation to serve as a control equation to describe movement of a fluid, and on the basis of a finite volume method discrete control equation, establishing a numerical wave tank by solving of a wave surface through a fluid volume function method; introducing a porous medium model into numerical simulation to simulate the net, wherein according to the porous medium model, flow resistance which is determined through an empirical assumption is coupled inside an area which is defined as a porous medium, and the flow resistance which is added manually is used for simulating the damping effect of the net in reality. Physical tests of the method confirm that wave dissipation results obtained through the numerical simulation are matched with real wave dissipation results, and the calculation time of the numerical simulation is within 10 hours. The method solves the problems that costs are high, consumed time is long, wave propagation changes nearby the net can not be provided in the prior art.

Description

Technical field [0001] The invention belongs to the technical fields of aquaculture engineering, water conservancy engineering and marine engineering, and particularly relates to a numerical method for the influence of flexible net clothing on wave propagation during wave action. Background technique [0002] Floating breakwaters can not only prevent waves, but also have little impact on the surrounding ecological environment. It can basically maintain the balance of the original marine ecological environment and will not affect the flow of tides and the exchange of sea water inside and outside the floating dike. At present, in the design of floating breakwaters, the use of floating boards and nets to form floating breakwaters to eliminate waves is widely used. Among them, the net structure is used to destroy the surface wave motion of the water body and absorb wave energy to reduce wave propagation. The main working principle of Lang work. [0003] At present, the physical model ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 赵云鹏毕春伟董国海
Owner DALIAN UNIV OF TECH
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