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Two-dimensional numerical simulation method of tsunami wave overtopping process

A technology of two-dimensional numerical and analog methods, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of high research cost and achieve the effect of promoting development

Active Publication Date: 2018-01-09
HOHAI UNIV
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Problems solved by technology

There are three main research methods for drifting currents: (1) theoretical research; (2) physical experiment; (3) numerical simulation, and physical experiment is the most commonly used method, but the research cost of physical experiment is relatively high

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  • Two-dimensional numerical simulation method of tsunami wave overtopping process
  • Two-dimensional numerical simulation method of tsunami wave overtopping process
  • Two-dimensional numerical simulation method of tsunami wave overtopping process

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Embodiment Construction

[0075] Such as figure 1 As shown, a two-dimensional numerical simulation method for the process of tsunami wave overtaking includes the following steps:

[0076] Step S1, according to the specific seawall structure outline and water depth conditions, determine the seawall model size, the numerical tank size and the initial space coordinates of all particles;

[0077] Step S2. According to the wave height of the target tsunami wave, iteratively generate the initial wave height value required by the wave-making pusher plate;

[0078] Step S3, control the movement of the fluid through the directly discrete Lagrangian continuity equation and momentum equation, simulate the process of tsunami wave overtaking, and obtain the movement form of the wave, the velocity field and the pressure field of the water flow structure;

[0079] Step S4, post-processing the output result.

[0080] In this embodiment, step S1 is specifically:

[0081] (1-1) According to the outline of the actual ...

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Abstract

The invention discloses a two-dimensional numerical simulation method of a tsunami wave overtopping process. The method comprises the steps that 1, the numerical water channel element form is determined according to the seawall outline; 2, initial wave height valves needed by wave pushing plate wave making are generated iteratively according to a target wave height of a tsunami wave; 3, through adirectly-discrete continuity equation and N-S equation in a lagrangian form, fluid motion is controlled, and the tsunami wave overtopping process is simulated to obtain the motion form, a flow velocity field and a pressure field of the wave; 4, the output results are calculated to obtain the maximal impact pressure value and the position of the maximal impact pressure value. By means of the method, the whole tsunami wave overtopping process and a changing process of the flow velocity field can be simulated, and the overtopping rate and the overtopping flow velocity of the top of a seawall canbe calculated to obtain the maximal impact pressure point of a seawall body and the position of the maximal impact pressure point.

Description

technical field [0001] The invention relates to the technical field of coastal engineering, in particular to a two-dimensional numerical simulation method for a tsunami wave overrunning process. Background technique [0002] As one of the important coastal protection structures, seawalls are often damaged under the action of dynamic loads such as waves and tides, especially under extreme dynamic conditions such as tsunamis and storm surges. Levee breaks cause coastal areas to directly bear the impact of waves and currents, bringing huge disasters to human life and production in coastal areas. The tsunami is a kind of powerful destructive sea wave, which is formed by the submarine earthquake and the surface wave that propagates around the landslide. There is almost no energy loss in the process of propagating to the near shore, and shallow water deformation occurs with the change of the terrain. Coastal areas pose a huge threat. [0003] According to the location of the dam...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02A90/10
Inventor 蒋勤王丽珠张长宽张骏聂思航张青刘鹏易迪
Owner HOHAI UNIV
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