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Tsunami motion forecasting method based on multi-hierarchy interaction

A motion prediction, multi-level technology, applied in measurement devices, geophysical measurements, instruments, etc., can solve problems such as slow calculation efficiency and inaccurate simulation process

Inactive Publication Date: 2010-07-28
EAST CHINA NORMAL UNIV
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing methods that focus on test simulation, slow calculation efficiency, inaccurate simulation process, etc., and provide a tsunami motion prediction method based on multi-level interaction

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  • Tsunami motion forecasting method based on multi-hierarchy interaction

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Embodiment Construction

[0048] The tsunami motion prediction method based on multi-level interaction involved in the present invention includes the following implementation steps:

[0049] Step 1: Grid generation of tsunami area based on source interaction

[0050] (1) First, we set relevant initial parameters according to the situation of the tsunami source. Earthquakes that cause tsunamis can occur in deep or shallow oceans. In this example, it is assumed that a tsunami occurs in the deep sea about 2000km away from the coast. From this point onwards, the calculation of the seabed topography is determined by equation (2). When the tsunami propagates to this point, the propagation speed of the tsunami can be calculated as:

[0051] v ( x ) = g × H ( x )

[0052] Then the distance traveled by the tsunami is equal to

[0053] ...

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Abstract

The invention discloses a tsunami motion forecasting method based on multi-hierarchy interaction, which comprises the following steps: 1) generating hierarchical grids according to the position of an actual tsunami source, establishing corresponding relation between the grids and spherical coordinates, and establishing an interaction mechanism of the hierarchical grids; 2) carrying out sector and square combined dispersion on a tsunami motion equation, setting initial conditions and boundary conditions according to actual conditions, and solving a wave equation to compute flux change of tsunami motion; and 3) setting an initial sea level height field according to the height of a sea level, establishing an interaction mechanism of particles and the grids in the process of tsunami motion, establishing updating and iterating rules of the particles, and then, forecasting the height of tsunami through interaction of the particles and the grids. The method can quickly and vividly forecast the tsunami propagation phenomenon and solves the problems that the existing simulation method only pays attention to numerical simulation, the simulation result is not visual, the computing efficiency is too slow, and the like. The method has certain practical value in the fields of disaster prevention, tsunami early warning, virtual simulation etc.

Description

technical field [0001] The invention relates to a tsunami motion prediction method based on multi-level interaction in disaster early warning simulation application. Background technique [0002] Tsunami is a very important natural disaster, which brings huge losses to people all over the world every year. On December 26, 2004, a rare tsunami swept across many countries in the Indian Ocean, killing about 300,000 people, and 5 million people lost their homes and livelihoods. This tsunami can cause people to think deeply. The tsunami has the characteristics of suddenness, long-distance impact, and great harm. The main reasons for this huge disaster are the general lack of necessary early warning mechanisms and scientific research funds, poor communication of information, and weak awareness of disasters among the public and the government. According to measurements, the tsunami reached Cocos Island 3 minutes after the earthquake and India 2.5 hours after the earthquake. Ther...

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Application Information

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IPC IPC(8): G01V1/00G06F17/50
CPCY02A90/10
Inventor 王长波
Owner EAST CHINA NORMAL UNIV
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